/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:23:59,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:23:59,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:23:59,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:23:59,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:23:59,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:23:59,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:23:59,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:23:59,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:23:59,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:23:59,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:23:59,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:23:59,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:23:59,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:23:59,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:23:59,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:23:59,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:23:59,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:23:59,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:23:59,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:23:59,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:23:59,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:23:59,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:23:59,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:23:59,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:23:59,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:23:59,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:23:59,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:23:59,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:23:59,737 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:23:59,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:23:59,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:23:59,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:23:59,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:23:59,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:23:59,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:23:59,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:23:59,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:23:59,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:23:59,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:23:59,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:23:59,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:23:59,814 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:23:59,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:23:59,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:23:59,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:23:59,819 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:23:59,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:23:59,820 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:23:59,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:23:59,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:23:59,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:23:59,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:23:59,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:23:59,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:23:59,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:23:59,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:23:59,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:23:59,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:23:59,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:23:59,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:23:59,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:23:59,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:23:59,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:23:59,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:23:59,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:23:59,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:24:00,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:24:00,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:24:00,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:24:00,257 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:24:00,261 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:24:00,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-14 18:24:00,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d43555448/d0c558d3b87943728ecbc22e3c1ffb5d/FLAGb244e9ca7 [2020-10-14 18:24:00,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:24:00,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/sum_multi_array.i [2020-10-14 18:24:00,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d43555448/d0c558d3b87943728ecbc22e3c1ffb5d/FLAGb244e9ca7 [2020-10-14 18:24:01,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d43555448/d0c558d3b87943728ecbc22e3c1ffb5d [2020-10-14 18:24:01,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:24:01,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:24:01,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:24:01,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:24:01,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:24:01,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:24:01" (1/1) ... [2020-10-14 18:24:01,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425b51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:01, skipping insertion in model container [2020-10-14 18:24:01,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:24:01" (1/1) ... [2020-10-14 18:24:01,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:24:01,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:24:01,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:24:58,218 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:24:58,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:24:58,268 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:24:58,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58 WrapperNode [2020-10-14 18:24:58,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:24:58,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:24:58,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:24:58,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:24:58,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... [2020-10-14 18:24:58,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:24:58,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:24:58,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:24:58,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:24:58,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:24:58,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:24:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:24:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:24:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:24:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:24:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:24:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:24:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:24:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:24:58,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:24:58,688 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:24:58,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:24:58 BoogieIcfgContainer [2020-10-14 18:24:58,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:24:58,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:24:58,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:24:58,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:24:58,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:24:01" (1/3) ... [2020-10-14 18:24:58,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1196a562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:24:58, skipping insertion in model container [2020-10-14 18:24:58,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:58" (2/3) ... [2020-10-14 18:24:58,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1196a562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:24:58, skipping insertion in model container [2020-10-14 18:24:58,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:24:58" (3/3) ... [2020-10-14 18:24:58,701 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_multi_array.i [2020-10-14 18:24:58,712 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:24:58,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:24:58,734 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:24:58,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:24:58,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:24:58,758 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:24:58,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:24:58,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:24:58,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:24:58,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:24:58,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:24:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 18:24:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:24:58,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:58,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:58,783 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-14 18:24:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:58,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145580245] [2020-10-14 18:24:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:58,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:59,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:59,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:59,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:24:59,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:24:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-14 18:24:59,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:59,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:24:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:24:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:24:59,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:24:59,846 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-10-14 18:24:59,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:59,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:59,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:59,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:59,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 18:24:59,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:59,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:59,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:24:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:24:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:25:00,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145580245] [2020-10-14 18:25:00,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:00,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 18:25:00,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473109933] [2020-10-14 18:25:00,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:25:00,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:00,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:25:00,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:25:00,059 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-14 18:25:00,554 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-14 18:25:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:00,658 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-14 18:25:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:25:00,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-14 18:25:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:00,670 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:25:00,670 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 18:25:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 18:25:00,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 18:25:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 18:25:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 18:25:00,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2020-10-14 18:25:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:00,719 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 18:25:00,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:25:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 18:25:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:25:00,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:00,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:00,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:25:00,721 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2020-10-14 18:25:00,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:00,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146516597] [2020-10-14 18:25:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:00,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:01,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:25:01,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-14 18:25:01,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:01,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:25:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:25:01,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:25:01,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:25:03,526 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-14 18:25:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:03,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-14 18:25:03,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:25:03,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146516597] [2020-10-14 18:25:03,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:03,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:25:03,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378428141] [2020-10-14 18:25:03,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:03,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:03,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:03,791 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2020-10-14 18:25:04,007 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-14 18:25:04,291 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-14 18:25:04,543 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-14 18:25:04,933 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-14 18:25:05,713 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-14 18:25:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:05,775 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-14 18:25:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:25:05,776 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-14 18:25:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:05,778 INFO L225 Difference]: With dead ends: 60 [2020-10-14 18:25:05,778 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:25:05,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:25:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:25:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2020-10-14 18:25:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:25:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-14 18:25:05,793 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 17 [2020-10-14 18:25:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:05,793 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-14 18:25:05,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-14 18:25:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 18:25:05,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:05,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:05,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:25:05,795 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1416793826, now seen corresponding path program 2 times [2020-10-14 18:25:05,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:05,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231908507] [2020-10-14 18:25:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:06,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:06,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 18:25:06,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-14 18:25:06,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:06,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:25:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:25:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:25:06,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:06,845 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-14 18:25:07,048 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 18:25:07,599 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-10-14 18:25:12,495 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-10-14 18:25:12,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:12,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:12,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:12,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:12,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:25:12,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231908507] [2020-10-14 18:25:12,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:12,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:25:12,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682673000] [2020-10-14 18:25:12,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:25:12,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:25:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:25:12,791 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 13 states. [2020-10-14 18:25:13,207 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-14 18:25:13,599 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-14 18:25:14,624 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-10-14 18:25:16,099 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 103 DAG size of output: 96 [2020-10-14 18:25:18,210 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2020-10-14 18:25:18,835 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-14 18:25:19,316 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-14 18:25:26,833 WARN L193 SmtUtils]: Spent 6.62 s on a formula simplification that was a NOOP. DAG size: 101 [2020-10-14 18:25:35,879 WARN L193 SmtUtils]: Spent 8.82 s on a formula simplification that was a NOOP. DAG size: 104 [2020-10-14 18:25:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:36,040 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-14 18:25:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:25:36,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-10-14 18:25:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:36,045 INFO L225 Difference]: With dead ends: 64 [2020-10-14 18:25:36,046 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:25:36,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:25:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:25:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2020-10-14 18:25:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:25:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-14 18:25:36,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 19 [2020-10-14 18:25:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:36,077 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-14 18:25:36,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:25:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-14 18:25:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:25:36,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:36,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:36,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:25:36,079 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 515736960, now seen corresponding path program 1 times [2020-10-14 18:25:36,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:36,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942998311] [2020-10-14 18:25:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:37,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:39,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:25:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:25:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3400 [2020-10-14 18:25:39,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:39,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:25:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:25:39,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:25:39,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:25:40,012 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-10-14 18:25:40,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:40,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:40,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:40,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:40,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:40,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-14 18:25:40,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:40,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:40,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:40,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:40,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:25:40,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942998311] [2020-10-14 18:25:40,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:40,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:25:40,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839841095] [2020-10-14 18:25:40,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:40,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:40,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:40,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:40,206 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-10-14 18:25:40,366 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-14 18:25:40,691 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-14 18:25:40,893 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-14 18:25:41,387 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 18:25:41,532 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-14 18:25:41,758 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 18:25:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:41,789 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-14 18:25:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:25:41,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-14 18:25:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:41,792 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:25:41,792 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:25:41,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:25:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:25:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 30. [2020-10-14 18:25:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 18:25:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 18:25:41,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-14 18:25:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:41,806 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 18:25:41,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 18:25:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:25:41,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:41,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:41,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:25:41,807 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -96694823, now seen corresponding path program 1 times [2020-10-14 18:25:41,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:41,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809460043] [2020-10-14 18:25:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:42,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:42,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:44,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:44,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:45,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:45,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:25:45,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:25:45,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3979 [2020-10-14 18:25:45,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:45,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:25:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:25:45,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:25:45,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:46,139 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-14 18:25:46,273 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-14 18:25:46,751 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-14 18:25:47,701 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2020-10-14 18:25:48,213 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-14 18:25:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:48,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:48,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 18:25:48,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:48,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:48,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:48,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-14 18:25:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:48,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:48,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 18:25:48,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:48,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:25:48,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:25:48,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809460043] [2020-10-14 18:25:48,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:48,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:25:48,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399286242] [2020-10-14 18:25:48,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:48,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:48,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:48,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:48,402 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-14 18:25:49,093 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-14 18:25:49,697 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-14 18:25:50,013 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 18:25:50,350 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-14 18:25:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:50,624 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-14 18:25:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:25:50,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-14 18:25:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:50,629 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:25:50,629 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 18:25:50,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:25:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 18:25:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-14 18:25:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 18:25:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 18:25:50,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-14 18:25:50,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:50,641 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 18:25:50,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 18:25:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:25:50,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:50,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:50,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:25:50,643 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1065593097, now seen corresponding path program 2 times [2020-10-14 18:25:50,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:50,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648259386] [2020-10-14 18:25:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:50,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:50,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:50,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:51,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:52,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:52,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:25:52,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:25:52,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2333 [2020-10-14 18:25:52,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:52,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:25:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:25:52,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:25:52,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:53,538 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-14 18:25:56,082 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-14 18:25:56,954 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 93 [2020-10-14 18:25:57,859 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-14 18:25:58,983 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 114 [2020-10-14 18:26:00,188 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 139 DAG size of output: 122 [2020-10-14 18:26:00,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:00,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:00,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 18:26:00,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:00,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:26:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:26:00,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:26:00,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-14 18:26:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:00,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:00,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:00,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:00,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-14 18:26:00,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:00,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:26:00,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:00,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:26:00,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:26:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:26:00,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648259386] [2020-10-14 18:26:00,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:00,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:26:00,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669555709] [2020-10-14 18:26:00,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:26:00,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:00,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:26:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:26:00,687 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2020-10-14 18:26:00,870 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-14 18:26:01,289 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 77 [2020-10-14 18:26:01,569 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-14 18:26:03,083 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 121 DAG size of output: 115 [2020-10-14 18:26:05,158 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 175 DAG size of output: 138 [2020-10-14 18:26:07,375 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2020-10-14 18:26:08,762 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-14 18:26:10,743 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-14 18:26:13,790 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 143 [2020-10-14 18:26:15,852 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 133 [2020-10-14 18:26:17,121 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-14 18:26:20,180 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification that was a NOOP. DAG size: 146 [2020-10-14 18:26:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:21,417 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-10-14 18:26:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:26:21,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-10-14 18:26:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:21,422 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:26:21,422 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:26:21,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:26:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:26:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-14 18:26:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:26:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-14 18:26:21,451 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2020-10-14 18:26:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:21,451 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-14 18:26:21,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:26:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-14 18:26:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:26:21,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:21,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:21,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:26:21,453 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -168931179, now seen corresponding path program 3 times [2020-10-14 18:26:21,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:21,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247427132] [2020-10-14 18:26:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:21,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:23,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:23,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:26:23,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:26:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2177 [2020-10-14 18:26:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:23,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:26:23,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 18:26:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:26:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:24,781 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-10-14 18:26:24,934 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-14 18:26:25,208 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-14 18:26:25,676 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-14 18:26:26,770 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 99 [2020-10-14 18:26:28,985 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 145 DAG size of output: 104 [2020-10-14 18:26:32,845 WARN L193 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 223 DAG size of output: 128 [2020-10-14 18:26:36,027 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 205 DAG size of output: 121 [2020-10-14 18:26:43,261 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 218 DAG size of output: 134 [2020-10-14 18:26:48,907 WARN L193 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 221 DAG size of output: 136 [2020-10-14 18:26:51,031 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-10-14 18:26:51,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:51,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:51,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:51,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:51,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:51,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:26:51,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:51,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 18:26:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:51,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:51,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:51,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:51,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:26:51,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:26:51,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247427132] [2020-10-14 18:26:51,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:51,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:26:51,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723224134] [2020-10-14 18:26:51,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:26:51,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:26:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:26:51,697 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 18 states. [2020-10-14 18:26:51,971 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-14 18:26:52,632 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 70 [2020-10-14 18:26:53,064 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-14 18:26:55,468 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 135 DAG size of output: 105 [2020-10-14 18:26:58,346 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 180 DAG size of output: 121 [2020-10-14 18:27:04,193 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 162 DAG size of output: 150 [2020-10-14 18:27:09,031 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2020-10-14 18:27:16,842 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification. DAG size of input: 142 DAG size of output: 137 [2020-10-14 18:27:23,695 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 189 DAG size of output: 160