/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --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/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:19,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:19,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:19,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:19,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:19,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:19,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:19,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:19,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:19,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:19,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:19,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:19,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:19,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:19,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:19,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:19,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:19,727 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:19,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:19,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:19,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:19,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:19,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:19,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:19,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:19,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:19,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:19,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:19,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:19,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:19,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:19,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:19,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:19,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:19,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:19,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:19,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:19,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:19,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:19,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:19,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:19,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:19,814 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:19,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:19,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:19,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:19,817 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:19,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:19,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:19,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:19,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:19,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:19,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:19,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:19,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:19,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:19,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:19,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:19,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:19,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:19,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:19,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:19,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:19,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:19,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:19,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:19,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:19,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:19,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:19,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:19,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:19,824 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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;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=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:20,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:20,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:20,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:20,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:20,322 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:20,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 09:10:20,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d7b0363/4d5411548aca494f99aa9c2a6e86f157/FLAG4217fd0f1 [2020-09-25 09:10:20,930 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:20,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 09:10:20,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d7b0363/4d5411548aca494f99aa9c2a6e86f157/FLAG4217fd0f1 [2020-09-25 09:10:21,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2d7b0363/4d5411548aca494f99aa9c2a6e86f157 [2020-09-25 09:10:21,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:21,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:21,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:21,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:21,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:21,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a29a149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21, skipping insertion in model container [2020-09-25 09:10:21,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:21,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:21,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:21,528 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:21,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:21,564 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:21,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21 WrapperNode [2020-09-25 09:10:21,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:21,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:21,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:21,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:21,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... [2020-09-25 09:10:21,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:21,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:21,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:21,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:21,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:21,947 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:21,947 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:10:21,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:21 BoogieIcfgContainer [2020-09-25 09:10:21,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:21,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:21,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:21,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:21,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:21" (1/3) ... [2020-09-25 09:10:21,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d064983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:21, skipping insertion in model container [2020-09-25 09:10:21,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:21" (2/3) ... [2020-09-25 09:10:21,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d064983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:21, skipping insertion in model container [2020-09-25 09:10:21,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:21" (3/3) ... [2020-09-25 09:10:21,961 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-09-25 09:10:21,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:21,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:22,003 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:22,032 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:22,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:22,032 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:22,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:22,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:22,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:22,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:22,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-25 09:10:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 09:10:22,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:22,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:22,060 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-09-25 09:10:22,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:22,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835188523] [2020-09-25 09:10:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:10:22,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-25 09:10:22,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:22,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:10:22,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:22,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 09:10:22,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:22,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 09:10:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:22,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835188523] [2020-09-25 09:10:22,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:22,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:22,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023452007] [2020-09-25 09:10:22,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:22,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:22,410 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-09-25 09:10:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:22,439 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-09-25 09:10:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:22,441 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 09:10:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:22,451 INFO L225 Difference]: With dead ends: 34 [2020-09-25 09:10:22,451 INFO L226 Difference]: Without dead ends: 17 [2020-09-25 09:10:22,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-25 09:10:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-25 09:10:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 09:10:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 09:10:22,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2020-09-25 09:10:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:22,501 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 09:10:22,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 09:10:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 09:10:22,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:22,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:22,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:22,503 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash 121681208, now seen corresponding path program 1 times [2020-09-25 09:10:22,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:22,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154212867] [2020-09-25 09:10:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:22,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:10:22,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:22,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:22,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:22,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154212867] [2020-09-25 09:10:22,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:22,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:22,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340026300] [2020-09-25 09:10:22,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:22,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:22,725 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-25 09:10:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:22,855 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-25 09:10:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:10:22,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 09:10:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:22,857 INFO L225 Difference]: With dead ends: 24 [2020-09-25 09:10:22,857 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 09:10:22,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 09:10:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-25 09:10:22,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 09:10:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-25 09:10:22,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-09-25 09:10:22,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:22,865 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-25 09:10:22,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:22,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-25 09:10:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 09:10:22,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:22,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:22,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:22,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-09-25 09:10:22,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:22,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108703859] [2020-09-25 09:10:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 09:10:23,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 09:10:23,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:23,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 09:10:23,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:10:23,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:23,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:23,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:23,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:23,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108703859] [2020-09-25 09:10:23,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:10:23,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698149776] [2020-09-25 09:10:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:23,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:23,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:23,060 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-09-25 09:10:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:23,139 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 09:10:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:10:23,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 09:10:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:23,140 INFO L225 Difference]: With dead ends: 31 [2020-09-25 09:10:23,141 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 09:10:23,141 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 [2020-09-25 09:10:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 09:10:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-09-25 09:10:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 09:10:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-25 09:10:23,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-09-25 09:10:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:23,148 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-25 09:10:23,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-25 09:10:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 09:10:23,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:23,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:23,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:23,150 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:23,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-09-25 09:10:23,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:23,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298015534] [2020-09-25 09:10:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 09:10:23,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 09:10:23,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 09:10:23,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:23,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:23,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:23,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:23,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:23,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 09:10:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:23,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298015534] [2020-09-25 09:10:23,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:23,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:10:23,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083917893] [2020-09-25 09:10:23,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:10:23,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:10:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:23,345 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-25 09:10:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:23,474 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 09:10:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:10:23,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 09:10:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:23,476 INFO L225 Difference]: With dead ends: 36 [2020-09-25 09:10:23,476 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 09:10:23,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 09:10:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 09:10:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 09:10:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-25 09:10:23,492 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-25 09:10:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:23,492 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-25 09:10:23,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:10:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-25 09:10:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 09:10:23,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:23,493 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:23,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:23,494 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-09-25 09:10:23,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:23,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606713832] [2020-09-25 09:10:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 09:10:23,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-09-25 09:10:23,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:23,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:23,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 09:10:23,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:23,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:23,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:23,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:23,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:23,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606713832] [2020-09-25 09:10:23,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:23,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:10:23,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801590300] [2020-09-25 09:10:23,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:10:23,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:10:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:23,738 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2020-09-25 09:10:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:23,885 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 09:10:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:10:23,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-25 09:10:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:23,887 INFO L225 Difference]: With dead ends: 41 [2020-09-25 09:10:23,887 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 09:10:23,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 09:10:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-25 09:10:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 09:10:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-25 09:10:23,895 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-09-25 09:10:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:23,895 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-25 09:10:23,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:10:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-25 09:10:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 09:10:23,897 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:23,897 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:23,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:23,897 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-09-25 09:10:23,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:23,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518578684] [2020-09-25 09:10:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 09:10:24,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 09:10:24,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:10:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:24,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 09:10:24,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:24,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:24,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:24,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:24,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518578684] [2020-09-25 09:10:24,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:24,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:10:24,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067285237] [2020-09-25 09:10:24,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:10:24,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:10:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:24,186 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2020-09-25 09:10:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:24,386 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 09:10:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:10:24,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-25 09:10:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:24,390 INFO L225 Difference]: With dead ends: 46 [2020-09-25 09:10:24,390 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 09:10:24,391 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 [2020-09-25 09:10:24,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 09:10:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-25 09:10:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 09:10:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 09:10:24,397 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-09-25 09:10:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:24,398 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 09:10:24,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:10:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 09:10:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 09:10:24,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:24,399 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:24,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:10:24,400 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-09-25 09:10:24,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:24,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580319974] [2020-09-25 09:10:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 09:10:24,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-25 09:10:24,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:10:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:24,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 09:10:24,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:24,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:24,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:24,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:24,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:24,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580319974] [2020-09-25 09:10:24,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:24,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:10:24,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694242370] [2020-09-25 09:10:24,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:10:24,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:10:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:10:24,734 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2020-09-25 09:10:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:24,943 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 09:10:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 09:10:24,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-25 09:10:24,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:24,945 INFO L225 Difference]: With dead ends: 51 [2020-09-25 09:10:24,945 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 09:10:24,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:24,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 09:10:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-25 09:10:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 09:10:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-25 09:10:24,952 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-09-25 09:10:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:24,952 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-25 09:10:24,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:10:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-25 09:10:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 09:10:24,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:24,954 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:24,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:10:24,955 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-09-25 09:10:24,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:24,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693972051] [2020-09-25 09:10:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 09:10:25,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:25,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-09-25 09:10:25,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 09:10:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:25,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 09:10:25,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:25,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:25,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:25,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:25,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:25,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:25,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:25,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693972051] [2020-09-25 09:10:25,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:25,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:10:25,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743578489] [2020-09-25 09:10:25,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:10:25,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:25,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:10:25,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:25,412 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 15 states. [2020-09-25 09:10:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:25,648 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 09:10:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 09:10:25,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-25 09:10:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:25,650 INFO L225 Difference]: With dead ends: 56 [2020-09-25 09:10:25,650 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 09:10:25,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 09:10:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 09:10:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-25 09:10:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 09:10:25,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-25 09:10:25,657 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-09-25 09:10:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:25,657 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-25 09:10:25,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:10:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-25 09:10:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 09:10:25,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:25,659 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:25,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:10:25,659 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:25,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-09-25 09:10:25,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:25,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975229] [2020-09-25 09:10:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 09:10:25,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:25,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-09-25 09:10:25,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 09:10:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:25,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 09:10:25,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:26,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:26,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:26,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:26,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:26,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:26,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:26,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:26,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:26,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:26,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:26,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975229] [2020-09-25 09:10:26,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:26,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 09:10:26,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630777269] [2020-09-25 09:10:26,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 09:10:26,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:26,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 09:10:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 09:10:26,122 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2020-09-25 09:10:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:26,377 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 09:10:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 09:10:26,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-09-25 09:10:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:26,378 INFO L225 Difference]: With dead ends: 58 [2020-09-25 09:10:26,379 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 09:10:26,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 09:10:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 09:10:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 09:10:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 09:10:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-25 09:10:26,385 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-09-25 09:10:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:26,386 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-25 09:10:26,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 09:10:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-25 09:10:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 09:10:26,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:26,388 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:26,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:10:26,388 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-09-25 09:10:26,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:26,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655128220] [2020-09-25 09:10:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:26,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:26,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:26,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 09:10:26,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:26,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-25 09:10:26,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:26,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:26,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:10:26,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:26,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 09:10:26,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:26,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:26,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:26,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:26,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:26,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:26,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:26,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:26,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:26,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655128220] [2020-09-25 09:10:26,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:26,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:10:26,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765673798] [2020-09-25 09:10:26,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:10:26,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:10:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:10:26,871 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 13 states. [2020-09-25 09:10:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:26,967 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-09-25 09:10:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 09:10:26,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-25 09:10:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:26,969 INFO L225 Difference]: With dead ends: 64 [2020-09-25 09:10:26,969 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 09:10:26,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-25 09:10:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 09:10:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 09:10:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 09:10:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-09-25 09:10:26,976 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-09-25 09:10:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:26,976 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-09-25 09:10:26,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:10:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-09-25 09:10:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 09:10:26,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:26,978 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:26,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:10:26,979 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1401826219, now seen corresponding path program 9 times [2020-09-25 09:10:26,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:26,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122764532] [2020-09-25 09:10:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:27,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:27,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 09:10:27,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:27,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-09-25 09:10:27,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:27,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 09:10:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 09:10:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:27,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:27,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:27,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:27,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:27,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:27,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:27,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:27,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 160 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:27,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122764532] [2020-09-25 09:10:27,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:27,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 09:10:27,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367883928] [2020-09-25 09:10:27,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 09:10:27,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 09:10:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:10:27,548 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2020-09-25 09:10:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:27,866 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 09:10:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 09:10:27,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-09-25 09:10:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:27,867 INFO L225 Difference]: With dead ends: 58 [2020-09-25 09:10:27,867 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 09:10:27,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 09:10:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 09:10:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 09:10:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 09:10:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 09:10:27,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-25 09:10:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:27,870 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 09:10:27,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 09:10:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 09:10:27,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 09:10:27,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 09:10:27,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 09:10:28,076 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-09-25 09:10:28,082 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 09:10:28,082 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:10:28,082 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 09:10:28,082 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 09:10:28,083 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 09:10:28,083 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 09:10:28,083 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-25 09:10:28,083 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-09-25 09:10:28,083 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 09:10:28,083 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-25 09:10:28,083 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-09-25 09:10:28,084 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-25 09:10:28,084 INFO L268 CegarLoopResult]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2020-09-25 09:10:28,084 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-25 09:10:28,084 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-25 09:10:28,084 INFO L264 CegarLoopResult]: At program point L13-6(lines 13 15) the Hoare annotation is: (let ((.cse0 (= main_~sn~0 0))) (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= 9 main_~i~0) (or .cse0 (= 16 main_~sn~0))) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0)) (and .cse0 (= main_~i~0 1)))) [2020-09-25 09:10:28,085 INFO L264 CegarLoopResult]: At program point L13-7(lines 13 15) the Hoare annotation is: (or (= main_~sn~0 0) (= 16 main_~sn~0)) [2020-09-25 09:10:28,085 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 09:10:28,085 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 09:10:28,085 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 09:10:28,085 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 09:10:28,085 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 09:10:28,086 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 09:10:28,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:28 BoogieIcfgContainer [2020-09-25 09:10:28,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:10:28,115 INFO L168 Benchmark]: Toolchain (without parser) took 6833.50 ms. Allocated memory was 140.0 MB in the beginning and 276.8 MB in the end (delta: 136.8 MB). Free memory was 102.4 MB in the beginning and 199.9 MB in the end (delta: -97.5 MB). Peak memory consumption was 39.3 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:28,116 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 09:10:28,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.95 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:28,118 INFO L168 Benchmark]: Boogie Preprocessor took 106.07 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 182.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:28,119 INFO L168 Benchmark]: RCFGBuilder took 279.60 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:28,120 INFO L168 Benchmark]: TraceAbstraction took 6159.76 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 169.6 MB in the beginning and 199.9 MB in the end (delta: -30.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:28,124 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.95 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.07 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 182.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.60 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6159.76 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 169.6 MB in the beginning and 199.9 MB in the end (delta: -30.3 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (9 <= i && (sn == 0 || 16 == sn))) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn)) || (sn == 0 && i == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 202 SDtfs, 129 SDslu, 1093 SDs, 0 SdLazy, 522 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 212 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=10, 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, 11 MinimizatonAttempts, 20 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 28 NumberOfFragments, 122 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 9 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 346 ConstructedInterpolants, 0 QuantifiedInterpolants, 42108 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 160/645 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...