/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 12:31:30,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:30,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:30,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:30,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:30,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:30,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:30,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:30,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:30,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:30,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:30,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:30,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:30,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:30,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:30,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:30,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:30,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:30,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:30,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:30,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:30,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:30,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:30,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:30,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:30,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:30,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:30,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:30,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:30,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:30,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:30,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:30,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:30,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:30,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:30,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:30,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:30,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:30,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:30,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:30,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:30,744 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 12:31:30,787 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:30,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:30,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:30,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:30,790 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:30,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:30,790 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:30,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:30,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:30,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:30,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:30,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:30,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:30,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:30,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:30,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:30,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:30,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:30,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:30,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:30,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:30,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:30,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:30,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:30,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:30,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:30,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:30,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:30,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:30,797 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:31,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:31,328 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:31,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:31,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:31,336 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:31,337 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 12:31:31,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d1ccc09/46f731ded9684f69902a8a9a2320e6ba/FLAG9d589445a [2020-09-25 12:31:31,979 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:31,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 12:31:31,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d1ccc09/46f731ded9684f69902a8a9a2320e6ba/FLAG9d589445a [2020-09-25 12:31:32,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77d1ccc09/46f731ded9684f69902a8a9a2320e6ba [2020-09-25 12:31:32,356 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:32,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:32,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:32,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:32,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:32,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb58955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:32,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:32,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,619 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:32,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,660 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:32,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32 WrapperNode [2020-09-25 12:31:32,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:32,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:32,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:32,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:32,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:32,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:32,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (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 12:31:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:32,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:32,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:32,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:32,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:33,104 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:33,109 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:33,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:33 BoogieIcfgContainer [2020-09-25 12:31:33,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:33,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:33,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:33,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:33,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:32" (1/3) ... [2020-09-25 12:31:33,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54204c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:33, skipping insertion in model container [2020-09-25 12:31:33,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (2/3) ... [2020-09-25 12:31:33,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54204c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:33, skipping insertion in model container [2020-09-25 12:31:33,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:33" (3/3) ... [2020-09-25 12:31:33,152 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-09-25 12:31:33,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:33,202 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:33,232 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:33,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:33,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:33,264 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:33,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:33,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:33,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:33,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:33,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-25 12:31:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 12:31:33,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,293 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-09-25 12:31:33,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286473763] [2020-09-25 12:31:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 12:31:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-25 12:31:33,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:33,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:31:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:33,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:33,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,658 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 12:31:33,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286473763] [2020-09-25 12:31:33,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:33,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:33,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758137667] [2020-09-25 12:31:33,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:33,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:33,685 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-09-25 12:31:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,784 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-09-25 12:31:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:31:33,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 12:31:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,797 INFO L225 Difference]: With dead ends: 43 [2020-09-25 12:31:33,797 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 12:31:33,802 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 12:31:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 12:31:33,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-25 12:31:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 12:31:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-25 12:31:33,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-09-25 12:31:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,845 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-25 12:31:33,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-25 12:31:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 12:31:33,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,846 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 12:31:33,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:33,847 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-09-25 12:31:33,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593591588] [2020-09-25 12:31:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 12:31:33,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-25 12:31:33,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 12:31:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 12:31:34,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:31:34,044 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 12:31:34,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593591588] [2020-09-25 12:31:34,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:31:34,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805239357] [2020-09-25 12:31:34,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:34,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:34,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:34,053 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-09-25 12:31:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,123 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 12:31:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:31:34,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 12:31:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,126 INFO L225 Difference]: With dead ends: 31 [2020-09-25 12:31:34,126 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 12:31:34,129 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 12:31:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 12:31:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-09-25 12:31:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 12:31:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-25 12:31:34,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-09-25 12:31:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,141 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-25 12:31:34,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-25 12:31:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 12:31:34,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,143 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 12:31:34,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:34,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-09-25 12:31:34,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822779437] [2020-09-25 12:31:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 12:31:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-25 12:31:34,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:31:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 12:31:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:34,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,400 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 12:31:34,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822779437] [2020-09-25 12:31:34,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:31:34,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147223069] [2020-09-25 12:31:34,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:31:34,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:31:34,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:31:34,403 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-25 12:31:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,492 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 12:31:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:31:34,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 12:31:34,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,494 INFO L225 Difference]: With dead ends: 36 [2020-09-25 12:31:34,494 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 12:31:34,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 12:31:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 12:31:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 12:31:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-25 12:31:34,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-25 12:31:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,503 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-25 12:31:34,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:31:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-25 12:31:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 12:31:34,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,505 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 12:31:34,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:34,505 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,506 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-09-25 12:31:34,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202241414] [2020-09-25 12:31:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:31:34,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-25 12:31:34,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:34,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:34,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 12:31:34,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:34,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,736 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 12:31:34,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202241414] [2020-09-25 12:31:34,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:31:34,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750759437] [2020-09-25 12:31:34,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:31:34,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:31:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:31:34,739 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2020-09-25 12:31:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,858 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 12:31:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:31:34,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-25 12:31:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,860 INFO L225 Difference]: With dead ends: 41 [2020-09-25 12:31:34,860 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 12:31:34,861 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 12:31:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 12:31:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-25 12:31:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 12:31:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-25 12:31:34,868 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-09-25 12:31:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,869 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-25 12:31:34,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:31:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-25 12:31:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 12:31:34,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,870 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 12:31:34,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:34,871 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-09-25 12:31:34,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643742960] [2020-09-25 12:31:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 12:31:35,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 12:31:35,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:35,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:35,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 12:31:35,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,161 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 12:31:35,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643742960] [2020-09-25 12:31:35,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:35,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354739835] [2020-09-25 12:31:35,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:35,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:35,164 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2020-09-25 12:31:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:35,330 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 12:31:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:31:35,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-25 12:31:35,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:35,332 INFO L225 Difference]: With dead ends: 46 [2020-09-25 12:31:35,332 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 12:31:35,333 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 12:31:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 12:31:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-25 12:31:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 12:31:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 12:31:35,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-09-25 12:31:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:35,340 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 12:31:35,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 12:31:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 12:31:35,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:35,342 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 12:31:35,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:31:35,343 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:35,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-09-25 12:31:35,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:35,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970528846] [2020-09-25 12:31:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 12:31:35,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-09-25 12:31:35,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:31:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:35,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 12:31:35,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:35,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,777 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 12:31:35,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970528846] [2020-09-25 12:31:35,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:35,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199877671] [2020-09-25 12:31:35,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:35,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:35,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:35,783 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2020-09-25 12:31:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,006 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 12:31:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 12:31:36,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-25 12:31:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,009 INFO L225 Difference]: With dead ends: 51 [2020-09-25 12:31:36,009 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 12:31:36,010 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 12:31:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 12:31:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-25 12:31:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 12:31:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-25 12:31:36,020 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-09-25 12:31:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,026 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-25 12:31:36,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-25 12:31:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 12:31:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,028 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 12:31:36,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:31:36,032 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,032 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-09-25 12:31:36,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205037118] [2020-09-25 12:31:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 12:31:36,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-09-25 12:31:36,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 12:31:36,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:36,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 12:31:36,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:36,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 12:31:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:36,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:36,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,501 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 12:31:36,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205037118] [2020-09-25 12:31:36,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:36,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 12:31:36,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520081367] [2020-09-25 12:31:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 12:31:36,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 12:31:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:31:36,505 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 15 states. [2020-09-25 12:31:36,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,730 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 12:31:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 12:31:36,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-25 12:31:36,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,732 INFO L225 Difference]: With dead ends: 56 [2020-09-25 12:31:36,732 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 12:31:36,734 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 12:31:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 12:31:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-25 12:31:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 12:31:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-25 12:31:36,740 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-09-25 12:31:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,740 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-25 12:31:36,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 12:31:36,741 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-25 12:31:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 12:31:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,742 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 12:31:36,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:31:36,743 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-09-25 12:31:36,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192055660] [2020-09-25 12:31:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 12:31:37,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-09-25 12:31:37,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 12:31:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:37,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 12:31:37,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:37,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:37,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:37,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:37,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:37,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:37,240 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 12:31:37,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192055660] [2020-09-25 12:31:37,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:37,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 12:31:37,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114777945] [2020-09-25 12:31:37,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 12:31:37,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 12:31:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:31:37,242 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2020-09-25 12:31:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:37,512 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 12:31:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 12:31:37,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-09-25 12:31:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:37,514 INFO L225 Difference]: With dead ends: 58 [2020-09-25 12:31:37,514 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 12:31:37,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 12:31:37,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 12:31:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 12:31:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 12:31:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-25 12:31:37,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-09-25 12:31:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:37,522 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-25 12:31:37,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 12:31:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-25 12:31:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 12:31:37,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:37,524 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 12:31:37,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:31:37,524 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-09-25 12:31:37,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:37,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516892934] [2020-09-25 12:31:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:37,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 12:31:37,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-25 12:31:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:31:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:37,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 12:31:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:37,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:37,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:37,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:37,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:37,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:37,980 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 12:31:37,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516892934] [2020-09-25 12:31:37,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:37,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:31:37,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143814768] [2020-09-25 12:31:37,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:31:37,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:37,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:31:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:31:37,983 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 13 states. [2020-09-25 12:31:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:38,068 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-09-25 12:31:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 12:31:38,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-25 12:31:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:38,070 INFO L225 Difference]: With dead ends: 64 [2020-09-25 12:31:38,070 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 12:31:38,071 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 12:31:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 12:31:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 12:31:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 12:31:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-09-25 12:31:38,077 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-09-25 12:31:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:38,077 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-09-25 12:31:38,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:31:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-09-25 12:31:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 12:31:38,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:38,078 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 12:31:38,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 12:31:38,079 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:38,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1401826219, now seen corresponding path program 9 times [2020-09-25 12:31:38,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:38,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429638457] [2020-09-25 12:31:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:38,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:38,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:38,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 12:31:38,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-09-25 12:31:38,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:38,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:31:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 12:31:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:38,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:38,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:38,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:38,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:38,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:38,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:38,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:38,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:38,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:38,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:38,636 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 12:31:38,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429638457] [2020-09-25 12:31:38,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:38,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 12:31:38,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691491134] [2020-09-25 12:31:38,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 12:31:38,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 12:31:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:31:38,639 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2020-09-25 12:31:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:39,002 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 12:31:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 12:31:39,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-09-25 12:31:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:39,004 INFO L225 Difference]: With dead ends: 58 [2020-09-25 12:31:39,004 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 12:31:39,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 12:31:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 12:31:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 12:31:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 12:31:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 12:31:39,007 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-25 12:31:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:39,007 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 12:31:39,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 12:31:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 12:31:39,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 12:31:39,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 12:31:39,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 12:31:39,285 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-09-25 12:31:39,291 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 12:31:39,292 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 12:31:39,292 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 12:31:39,292 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 12:31:39,292 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 12:31:39,292 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 12:31:39,292 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2020-09-25 12:31:39,293 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-25 12:31:39,294 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-25 12:31:39,295 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 12:31:39,295 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 12:31:39,295 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 12:31:39,295 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 12:31:39,296 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 12:31:39,296 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 12:31:39,296 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 12:31:39,296 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 12:31:39,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:39 BoogieIcfgContainer [2020-09-25 12:31:39,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:39,359 INFO L168 Benchmark]: Toolchain (without parser) took 7001.00 ms. Allocated memory was 141.0 MB in the beginning and 278.4 MB in the end (delta: 137.4 MB). Free memory was 104.0 MB in the beginning and 205.3 MB in the end (delta: -101.3 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,360 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.88 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,366 INFO L168 Benchmark]: Boogie Preprocessor took 110.65 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 94.1 MB in the beginning and 182.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,367 INFO L168 Benchmark]: RCFGBuilder took 348.71 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,368 INFO L168 Benchmark]: TraceAbstraction took 6225.31 ms. Allocated memory was 202.9 MB in the beginning and 278.4 MB in the end (delta: 75.5 MB). Free memory was 169.9 MB in the beginning and 205.3 MB in the end (delta: -35.4 MB). Peak memory consumption was 40.1 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:39,380 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.88 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 94.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.65 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 94.1 MB in the beginning and 182.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.71 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6225.31 ms. Allocated memory was 202.9 MB in the beginning and 278.4 MB in the end (delta: 75.5 MB). Free memory was 169.9 MB in the beginning and 205.3 MB in the end (delta: -35.4 MB). Peak memory consumption was 40.1 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: 5.7s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 139 SDslu, 1034 SDs, 0 SdLazy, 514 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 208 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=9, 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, 10 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, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 41965 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 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...