/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 09:10:17,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 09:10:17,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 09:10:17,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 09:10:17,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 09:10:17,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 09:10:17,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 09:10:17,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 09:10:17,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 09:10:17,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 09:10:17,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 09:10:17,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 09:10:17,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 09:10:17,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 09:10:17,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 09:10:17,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 09:10:17,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 09:10:17,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 09:10:17,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 09:10:17,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 09:10:17,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 09:10:17,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 09:10:17,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 09:10:17,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 09:10:17,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 09:10:17,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 09:10:17,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 09:10:17,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 09:10:17,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 09:10:17,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 09:10:17,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 09:10:17,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 09:10:17,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 09:10:17,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 09:10:17,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 09:10:17,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 09:10:17,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 09:10:17,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 09:10:17,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 09:10:17,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 09:10:17,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 09:10:17,793 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 09:10:17,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 09:10:17,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 09:10:17,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 09:10:17,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 09:10:17,845 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 09:10:17,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 09:10:17,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 09:10:17,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 09:10:17,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 09:10:17,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 09:10:17,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 09:10:17,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 09:10:17,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 09:10:17,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 09:10:17,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 09:10:17,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 09:10:17,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 09:10:17,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 09:10:17,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 09:10:17,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 09:10:17,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 09:10:17,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:17,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 09:10:17,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 09:10:17,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 09:10:17,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 09:10:17,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 09:10:17,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 09:10:17,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 09:10:17,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-09-25 09:10:18,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 09:10:18,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 09:10:18,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 09:10:18,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 09:10:18,352 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 09:10:18,353 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 09:10:18,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a40ede0f/4128ba4abea84cb4ad195a770bb8dc1c/FLAG67ce7019a [2020-09-25 09:10:19,025 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 09:10:19,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 09:10:19,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a40ede0f/4128ba4abea84cb4ad195a770bb8dc1c/FLAG67ce7019a [2020-09-25 09:10:19,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7a40ede0f/4128ba4abea84cb4ad195a770bb8dc1c [2020-09-25 09:10:19,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 09:10:19,399 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 09:10:19,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:19,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 09:10:19,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 09:10:19,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f0ef37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19, skipping insertion in model container [2020-09-25 09:10:19,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 09:10:19,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 09:10:19,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:19,646 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 09:10:19,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 09:10:19,683 INFO L208 MainTranslator]: Completed translation [2020-09-25 09:10:19,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19 WrapperNode [2020-09-25 09:10:19,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 09:10:19,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 09:10:19,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 09:10:19,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 09:10:19,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... [2020-09-25 09:10:19,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 09:10:19,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 09:10:19,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 09:10:19,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 09:10:19,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 09:10:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 09:10:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 09:10:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 09:10:19,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 09:10:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 09:10:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 09:10:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 09:10:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 09:10:19,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 09:10:20,065 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 09:10:20,065 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 09:10:20,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:20 BoogieIcfgContainer [2020-09-25 09:10:20,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 09:10:20,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 09:10:20,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 09:10:20,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 09:10:20,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 09:10:19" (1/3) ... [2020-09-25 09:10:20,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143b3863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:20, skipping insertion in model container [2020-09-25 09:10:20,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 09:10:19" (2/3) ... [2020-09-25 09:10:20,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143b3863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 09:10:20, skipping insertion in model container [2020-09-25 09:10:20,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 09:10:20" (3/3) ... [2020-09-25 09:10:20,079 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-25 09:10:20,091 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 09:10:20,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 09:10:20,133 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 09:10:20,164 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 09:10:20,165 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 09:10:20,165 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 09:10:20,165 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 09:10:20,165 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 09:10:20,165 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 09:10:20,165 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 09:10:20,166 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 09:10:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 09:10:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 09:10:20,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:20,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:20,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-25 09:10:20,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:20,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984257653] [2020-09-25 09:10:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:10:20,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:20,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-25 09:10:20,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:20,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 09:10:20,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:20,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 09:10:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:20,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:20,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:20,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:20,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984257653] [2020-09-25 09:10:20,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:20,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 09:10:20,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306415325] [2020-09-25 09:10:20,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 09:10:20,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:20,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 09:10:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:20,522 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-25 09:10:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:20,551 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-25 09:10:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 09:10:20,552 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 09:10:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:20,562 INFO L225 Difference]: With dead ends: 35 [2020-09-25 09:10:20,562 INFO L226 Difference]: Without dead ends: 18 [2020-09-25 09:10:20,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 09:10:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-25 09:10:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-25 09:10:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 09:10:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-25 09:10:20,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-25 09:10:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:20,607 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-25 09:10:20,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 09:10:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-25 09:10:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 09:10:20,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:20,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:20,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 09:10:20,609 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-25 09:10:20,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:20,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411131238] [2020-09-25 09:10:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 09:10:20,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:20,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-25 09:10:20,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 09:10:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:10:20,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:20,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:20,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:20,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:20,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:20,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:20,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:20,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:20,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:20,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411131238] [2020-09-25 09:10:20,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 09:10:20,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 09:10:20,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291179832] [2020-09-25 09:10:20,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:20,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:20,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:20,843 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-09-25 09:10:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:20,889 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-09-25 09:10:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 09:10:20,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 09:10:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:20,891 INFO L225 Difference]: With dead ends: 29 [2020-09-25 09:10:20,891 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 09:10:20,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 09:10:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 09:10:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 09:10:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 09:10:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 09:10:20,900 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-25 09:10:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:20,900 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 09:10:20,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 09:10:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 09:10:20,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:20,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:20,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 09:10:20,903 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-25 09:10:20,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:20,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975926169] [2020-09-25 09:10:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:20,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:20,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 09:10:21,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:21,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-25 09:10:21,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 09:10:21,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 09:10:21,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:21,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:21,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:21,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:21,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975926169] [2020-09-25 09:10:21,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:21,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 09:10:21,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774682099] [2020-09-25 09:10:21,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 09:10:21,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 09:10:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 09:10:21,190 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-25 09:10:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:21,277 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-25 09:10:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 09:10:21,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 09:10:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:21,279 INFO L225 Difference]: With dead ends: 45 [2020-09-25 09:10:21,279 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 09:10:21,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 09:10:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-25 09:10:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 09:10:21,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-25 09:10:21,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-25 09:10:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:21,288 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-25 09:10:21,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 09:10:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-25 09:10:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 09:10:21,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:21,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:21,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 09:10:21,293 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-25 09:10:21,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:21,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579512494] [2020-09-25 09:10:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 09:10:21,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:10:21,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-25 09:10:21,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 09:10:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 09:10:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:21,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:21,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:21,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:21,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:21,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:21,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579512494] [2020-09-25 09:10:21,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:21,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 09:10:21,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508568098] [2020-09-25 09:10:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 09:10:21,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 09:10:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 09:10:21,690 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-25 09:10:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:21,786 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-25 09:10:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 09:10:21,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 09:10:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:21,788 INFO L225 Difference]: With dead ends: 45 [2020-09-25 09:10:21,788 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 09:10:21,789 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 09:10:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 09:10:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 09:10:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 09:10:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-25 09:10:21,796 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-09-25 09:10:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:21,796 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-25 09:10:21,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 09:10:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-25 09:10:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 09:10:21,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:21,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:21,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 09:10:21,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times [2020-09-25 09:10:21,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:21,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976751015] [2020-09-25 09:10:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:21,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 09:10:22,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:10:22,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-09-25 09:10:22,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 09:10:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 09:10:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:22,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:22,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:22,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 09:10:22,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:22,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:22,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:22,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:22,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:22,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976751015] [2020-09-25 09:10:22,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:22,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 09:10:22,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227960219] [2020-09-25 09:10:22,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 09:10:22,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 09:10:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 09:10:22,378 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-09-25 09:10:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:22,551 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-25 09:10:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 09:10:22,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-25 09:10:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:22,553 INFO L225 Difference]: With dead ends: 44 [2020-09-25 09:10:22,553 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 09:10:22,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 09:10:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 09:10:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 09:10:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 09:10:22,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-09-25 09:10:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:22,562 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 09:10:22,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 09:10:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 09:10:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 09:10:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:22,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:22,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 09:10:22,564 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times [2020-09-25 09:10:22,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:22,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495436899] [2020-09-25 09:10:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:22,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 09:10:23,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:10:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-09-25 09:10:23,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 09:10:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:23,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 09:10:23,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:23,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:23,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:23,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:23,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:23,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:23,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:23,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:23,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:23,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495436899] [2020-09-25 09:10:23,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:23,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 09:10:23,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125368705] [2020-09-25 09:10:23,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 09:10:23,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 09:10:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 09:10:23,136 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2020-09-25 09:10:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:23,314 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-25 09:10:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 09:10:23,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-25 09:10:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:23,318 INFO L225 Difference]: With dead ends: 49 [2020-09-25 09:10:23,318 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 09:10:23,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 09:10:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 09:10:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-25 09:10:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 09:10:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 09:10:23,327 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-25 09:10:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:23,328 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 09:10:23,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 09:10:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 09:10:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 09:10:23,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:23,329 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:23,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 09:10:23,330 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times [2020-09-25 09:10:23,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:23,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229293985] [2020-09-25 09:10:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:23,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 09:10:24,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 09:10:24,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-09-25 09:10:24,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 09:10:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:24,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 09:10:24,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:24,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:24,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:24,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:24,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229293985] [2020-09-25 09:10:24,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:24,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 09:10:24,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944256209] [2020-09-25 09:10:24,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 09:10:24,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 09:10:24,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 09:10:24,168 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2020-09-25 09:10:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:24,410 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 09:10:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 09:10:24,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-09-25 09:10:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:24,412 INFO L225 Difference]: With dead ends: 54 [2020-09-25 09:10:24,412 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 09:10:24,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 09:10:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 09:10:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 09:10:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 09:10:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-25 09:10:24,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-25 09:10:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:24,420 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-25 09:10:24,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 09:10:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-25 09:10:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 09:10:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:24,422 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:24,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 09:10:24,422 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 3 times [2020-09-25 09:10:24,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:24,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516593514] [2020-09-25 09:10:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:24,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:24,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 09:10:25,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 09:10:25,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-09-25 09:10:25,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 09:10:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:25,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 09:10:25,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 09:10:25,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:25,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:25,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:25,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 09:10:25,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:25,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:25,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:25,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:25,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516593514] [2020-09-25 09:10:25,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:25,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 09:10:25,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962593637] [2020-09-25 09:10:25,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 09:10:25,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 09:10:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 09:10:25,170 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 15 states. [2020-09-25 09:10:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:25,446 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-25 09:10:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 09:10:25,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-09-25 09:10:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:25,448 INFO L225 Difference]: With dead ends: 59 [2020-09-25 09:10:25,448 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 09:10:25,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 09:10:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 09:10:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-25 09:10:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 09:10:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 09:10:25,463 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-25 09:10:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:25,466 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 09:10:25,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 09:10:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 09:10:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 09:10:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:25,468 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:25,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 09:10:25,468 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 4 times [2020-09-25 09:10:25,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:25,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167494910] [2020-09-25 09:10:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:25,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:25,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 09:10:25,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 09:10:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-09-25 09:10:25,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:25,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 09:10:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 09:10:25,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 09:10:25,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 09:10:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 09:10:26,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 09:10:26,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 09:10:26,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 09:10:26,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 09:10:26,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 09:10:26,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 09:10:26,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 09:10:26,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 09:10:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 09:10:26,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 09:10:26,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 09:10:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 09:10:26,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167494910] [2020-09-25 09:10:26,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 09:10:26,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 09:10:26,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962742846] [2020-09-25 09:10:26,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 09:10:26,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 09:10:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 09:10:26,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 09:10:26,191 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-25 09:10:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 09:10:26,519 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-25 09:10:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 09:10:26,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-25 09:10:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 09:10:26,521 INFO L225 Difference]: With dead ends: 61 [2020-09-25 09:10:26,521 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 09:10:26,522 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 09:10:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 09:10:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 09:10:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 09:10:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-25 09:10:26,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-25 09:10:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 09:10:26,536 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-25 09:10:26,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 09:10:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-25 09:10:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 09:10:26,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 09:10:26,539 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 09:10:26,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 09:10:26,540 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 09:10:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 09:10:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 5 times [2020-09-25 09:10:26,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 09:10:26,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687427387] [2020-09-25 09:10:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 09:10:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 09:10:26,556 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 09:10:26,556 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 09:10:26,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 09:10:26,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 09:10:26 BoogieIcfgContainer [2020-09-25 09:10:26,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 09:10:26,594 INFO L168 Benchmark]: Toolchain (without parser) took 7198.15 ms. Allocated memory was 141.0 MB in the beginning and 274.2 MB in the end (delta: 133.2 MB). Free memory was 104.4 MB in the beginning and 98.3 MB in the end (delta: 6.0 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:26,595 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 09:10:26,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.04 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:26,600 INFO L168 Benchmark]: Boogie Preprocessor took 116.44 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:26,602 INFO L168 Benchmark]: RCFGBuilder took 267.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:26,605 INFO L168 Benchmark]: TraceAbstraction took 6519.05 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 171.0 MB in the beginning and 98.3 MB in the end (delta: 72.7 MB). Peak memory consumption was 142.4 MB. Max. memory is 7.1 GB. [2020-09-25 09:10:26,613 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 285.04 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 94.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.44 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 171.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6519.05 ms. Allocated memory was 204.5 MB in the beginning and 274.2 MB in the end (delta: 69.7 MB). Free memory was 171.0 MB in the beginning and 98.3 MB in the end (delta: 72.7 MB). Peak memory consumption was 142.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 135 SDslu, 725 SDs, 0 SdLazy, 412 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 257 ConstructedInterpolants, 0 QuantifiedInterpolants, 21693 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...