/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=0.2 --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 11:23:52,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:23:52,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:23:52,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:23:52,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:23:52,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:23:52,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:23:52,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:23:52,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:23:52,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:23:52,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:23:52,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:23:52,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:23:52,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:23:52,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:23:52,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:23:52,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:23:52,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:23:52,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:23:52,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:23:52,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:23:52,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:23:52,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:23:52,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:23:52,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:23:52,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:23:52,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:23:52,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:23:52,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:23:52,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:23:52,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:23:52,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:23:52,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:23:52,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:23:52,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:23:52,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:23:52,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:23:52,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:23:52,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:23:52,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:23:52,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:23:52,556 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 11:23:52,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:23:52,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:23:52,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:23:52,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:23:52,590 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:23:52,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:23:52,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:23:52,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:23:52,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:23:52,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:23:52,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:23:52,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:23:52,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:23:52,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:23:52,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:23:52,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:23:52,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:23:52,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:23:52,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:23:52,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:23:52,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:23:52,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:23:52,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:23:52,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:23:52,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:23:52,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:23:52,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:23:52,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:23:52,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:23:52,596 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:23:53,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:23:53,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:23:53,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:23:53,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:23:53,129 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:23:53,130 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 11:23:53,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00fbd9aae/f6f9833d1b824393962a2542b5a7bea7/FLAG504458aff [2020-09-25 11:23:53,767 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:23:53,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-09-25 11:23:53,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00fbd9aae/f6f9833d1b824393962a2542b5a7bea7/FLAG504458aff [2020-09-25 11:23:54,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00fbd9aae/f6f9833d1b824393962a2542b5a7bea7 [2020-09-25 11:23:54,124 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:23:54,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:23:54,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:54,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:23:54,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:23:54,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54, skipping insertion in model container [2020-09-25 11:23:54,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:23:54,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:23:54,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:54,419 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:23:54,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:23:54,450 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:23:54,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54 WrapperNode [2020-09-25 11:23:54,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:23:54,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:23:54,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:23:54,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:23:54,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (1/1) ... [2020-09-25 11:23:54,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:23:54,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:23:54,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:23:54,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:23:54,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (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 11:23:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:23:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:23:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:23:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:23:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:23:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:23:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:23:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:23:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:23:54,833 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:23:54,834 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:23:54,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:54 BoogieIcfgContainer [2020-09-25 11:23:54,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:23:54,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:23:54,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:23:54,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:23:54,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:23:54" (1/3) ... [2020-09-25 11:23:54,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c873397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:54, skipping insertion in model container [2020-09-25 11:23:54,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:23:54" (2/3) ... [2020-09-25 11:23:54,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c873397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:23:54, skipping insertion in model container [2020-09-25 11:23:54,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:23:54" (3/3) ... [2020-09-25 11:23:54,849 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-09-25 11:23:54,862 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:23:54,873 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:23:54,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:23:54,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:23:54,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:23:54,955 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:23:54,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:23:54,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:23:54,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:23:54,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:23:54,957 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:23:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-25 11:23:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 11:23:54,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:54,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:23:54,996 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash 129992897, now seen corresponding path program 1 times [2020-09-25 11:23:55,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485895851] [2020-09-25 11:23:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:23:55,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:23:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 11:23:55,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:23:55,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:55,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 11:23:55,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:23:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:23:55,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:55,390 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 11:23:55,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485895851] [2020-09-25 11:23:55,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:23:55,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:23:55,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394050872] [2020-09-25 11:23:55,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:23:55,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:23:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:23:55,416 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-09-25 11:23:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,531 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-09-25 11:23:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:23:55,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 11:23:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,544 INFO L225 Difference]: With dead ends: 43 [2020-09-25 11:23:55,544 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 11:23:55,549 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 11:23:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 11:23:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-09-25 11:23:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 11:23:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-25 11:23:55,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-09-25 11:23:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,594 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-25 11:23:55,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:23:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-25 11:23:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 11:23:55,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,596 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 11:23:55,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:23:55,597 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash -917865259, now seen corresponding path program 1 times [2020-09-25 11:23:55,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248338142] [2020-09-25 11:23:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 11:23:55,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-25 11:23:55,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:23:55,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 11:23:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:55,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:55,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:55,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:55,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:23:55,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:55,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:55,770 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 11:23:55,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248338142] [2020-09-25 11:23:55,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:23:55,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296912127] [2020-09-25 11:23:55,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:23:55,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:23:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:23:55,776 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-09-25 11:23:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:55,832 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 11:23:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:23:55,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 11:23:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:55,835 INFO L225 Difference]: With dead ends: 31 [2020-09-25 11:23:55,835 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 11:23:55,836 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 11:23:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 11:23:55,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-09-25 11:23:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 11:23:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-25 11:23:55,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-09-25 11:23:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:55,844 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-25 11:23:55,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:23:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-25 11:23:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 11:23:55,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:55,845 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 11:23:55,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:23:55,846 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2060587176, now seen corresponding path program 2 times [2020-09-25 11:23:55,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:55,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885085336] [2020-09-25 11:23:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:55,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 11:23:56,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-09-25 11:23:56,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:23:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:56,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 11:23:56,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:56,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,108 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 11:23:56,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885085336] [2020-09-25 11:23:56,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:23:56,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464764647] [2020-09-25 11:23:56,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:23:56,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:23:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:23:56,111 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-25 11:23:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:56,203 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 11:23:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 11:23:56,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-25 11:23:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:56,205 INFO L225 Difference]: With dead ends: 36 [2020-09-25 11:23:56,205 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 11:23:56,206 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 11:23:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 11:23:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 11:23:56,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 11:23:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-25 11:23:56,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-25 11:23:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:56,213 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-25 11:23:56,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:23:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-25 11:23:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:23:56,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:56,215 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 11:23:56,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:23:56,216 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash 657233589, now seen corresponding path program 3 times [2020-09-25 11:23:56,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:56,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592915074] [2020-09-25 11:23:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:23:56,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-25 11:23:56,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:23:56,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:56,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:23:56,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:56,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,448 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 11:23:56,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592915074] [2020-09-25 11:23:56,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:23:56,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481513791] [2020-09-25 11:23:56,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:23:56,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:23:56,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:23:56,452 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2020-09-25 11:23:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:56,574 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 11:23:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:23:56,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-25 11:23:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:56,576 INFO L225 Difference]: With dead ends: 41 [2020-09-25 11:23:56,576 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 11:23:56,577 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 11:23:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 11:23:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-25 11:23:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 11:23:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-25 11:23:56,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-09-25 11:23:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:56,584 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-25 11:23:56,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:23:56,585 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-25 11:23:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 11:23:56,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:56,586 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 11:23:56,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:23:56,587 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1410268808, now seen corresponding path program 4 times [2020-09-25 11:23:56,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:56,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758006331] [2020-09-25 11:23:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 11:23:56,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-09-25 11:23:56,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:23:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:23:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:56,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:56,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:56,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:56,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:56,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:56,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:56,876 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 11:23:56,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758006331] [2020-09-25 11:23:56,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:56,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:23:56,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398070981] [2020-09-25 11:23:56,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:23:56,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:56,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:23:56,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:23:56,879 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 11 states. [2020-09-25 11:23:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:57,021 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 11:23:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:23:57,022 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-25 11:23:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:57,023 INFO L225 Difference]: With dead ends: 46 [2020-09-25 11:23:57,023 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 11:23:57,024 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 11:23:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 11:23:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-25 11:23:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 11:23:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 11:23:57,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-09-25 11:23:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:57,031 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 11:23:57,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:23:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 11:23:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 11:23:57,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:57,033 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 11:23:57,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:23:57,033 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1340090219, now seen corresponding path program 5 times [2020-09-25 11:23:57,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:57,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980802209] [2020-09-25 11:23:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 11:23:57,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-09-25 11:23:57,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:23:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:57,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 11:23:57,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:57,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:23:57,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:57,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:57,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:57,394 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 11:23:57,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980802209] [2020-09-25 11:23:57,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:57,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:57,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361138052] [2020-09-25 11:23:57,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:57,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:57,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:57,397 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2020-09-25 11:23:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:57,586 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 11:23:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:23:57,586 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-25 11:23:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:57,587 INFO L225 Difference]: With dead ends: 51 [2020-09-25 11:23:57,588 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 11:23:57,589 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 11:23:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 11:23:57,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-25 11:23:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 11:23:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-25 11:23:57,595 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-09-25 11:23:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:57,596 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-25 11:23:57,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-25 11:23:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 11:23:57,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:57,597 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 11:23:57,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:23:57,598 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:57,598 INFO L82 PathProgramCache]: Analyzing trace with hash 740027288, now seen corresponding path program 6 times [2020-09-25 11:23:57,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:57,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288171398] [2020-09-25 11:23:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:57,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-09-25 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:23:57,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:57,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 11:23:57,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:58,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:58,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 11:23:58,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:58,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:58,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:58,057 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 11:23:58,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288171398] [2020-09-25 11:23:58,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:58,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:23:58,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458869976] [2020-09-25 11:23:58,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:23:58,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:23:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:23:58,060 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 15 states. [2020-09-25 11:23:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:58,301 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-25 11:23:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:23:58,302 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-25 11:23:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:58,303 INFO L225 Difference]: With dead ends: 56 [2020-09-25 11:23:58,303 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 11:23:58,306 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 11:23:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 11:23:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-25 11:23:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 11:23:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-25 11:23:58,319 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-09-25 11:23:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:58,324 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-25 11:23:58,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:23:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-25 11:23:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 11:23:58,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:58,328 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 11:23:58,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:23:58,329 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1053966965, now seen corresponding path program 7 times [2020-09-25 11:23:58,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:58,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550750987] [2020-09-25 11:23:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:58,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-25 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 11:23:58,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:23:58,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:58,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:58,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:58,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:58,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:58,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:58,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:58,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:58,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:58,864 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 11:23:58,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550750987] [2020-09-25 11:23:58,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:58,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 11:23:58,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037414011] [2020-09-25 11:23:58,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 11:23:58,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 11:23:58,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:23:58,867 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2020-09-25 11:23:59,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:59,129 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 11:23:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 11:23:59,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-09-25 11:23:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:59,130 INFO L225 Difference]: With dead ends: 58 [2020-09-25 11:23:59,130 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 11:23:59,134 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 11:23:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 11:23:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 11:23:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 11:23:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-25 11:23:59,144 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2020-09-25 11:23:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:59,148 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-25 11:23:59,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 11:23:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-25 11:23:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 11:23:59,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:59,151 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 11:23:59,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:23:59,153 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:59,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:59,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1480544840, now seen corresponding path program 8 times [2020-09-25 11:23:59,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:59,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994938336] [2020-09-25 11:23:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:59,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:59,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 11:23:59,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:59,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-09-25 11:23:59,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:59,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:59,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:23:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 11:23:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-25 11:23:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:59,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:23:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:59,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:23:59,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:23:59,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:23:59,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:23:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:23:59,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:23:59,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:23:59,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:23:59,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:23:59,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:23:59,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:23:59,722 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 11:23:59,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994938336] [2020-09-25 11:23:59,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:23:59,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:23:59,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760553918] [2020-09-25 11:23:59,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:23:59,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:23:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:23:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:23:59,725 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 13 states. [2020-09-25 11:23:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:23:59,856 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-09-25 11:23:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:23:59,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-09-25 11:23:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:23:59,857 INFO L225 Difference]: With dead ends: 64 [2020-09-25 11:23:59,857 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 11:23:59,858 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 11:23:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 11:23:59,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-25 11:23:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 11:23:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-09-25 11:23:59,864 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2020-09-25 11:23:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:23:59,864 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-09-25 11:23:59,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:23:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-09-25 11:23:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 11:23:59,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:23:59,866 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 11:23:59,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:23:59,866 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:23:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:23:59,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1401826219, now seen corresponding path program 9 times [2020-09-25 11:23:59,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:23:59,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324290934] [2020-09-25 11:23:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:23:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:23:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:00,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:00,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 11:24:00,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:00,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-09-25 11:24:00,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:00,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:24:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 11:24:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 11:24:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:00,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:24:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:24:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:24:00,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:24:00,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:24:00,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:24:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 11:24:00,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:24:00,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:24:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:24:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:24:00,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:24:00,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:24:00,429 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 11:24:00,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324290934] [2020-09-25 11:24:00,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:24:00,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 11:24:00,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872485446] [2020-09-25 11:24:00,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 11:24:00,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:24:00,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 11:24:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:24:00,432 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2020-09-25 11:24:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:24:00,776 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 11:24:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 11:24:00,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-09-25 11:24:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:24:00,778 INFO L225 Difference]: With dead ends: 58 [2020-09-25 11:24:00,778 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 11:24:00,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 11:24:00,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 11:24:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 11:24:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 11:24:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 11:24:00,782 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-25 11:24:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:24:00,782 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 11:24:00,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 11:24:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 11:24:00,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 11:24:00,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:24:00,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 11:24:01,056 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-09-25 11:24:01,062 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 11:24:01,062 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 11:24:01,062 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 11:24:01,062 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 11:24:01,063 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 11:24:01,063 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 11:24:01,063 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-25 11:24:01,063 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-09-25 11:24:01,063 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 11:24:01,064 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-25 11:24:01,064 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-09-25 11:24:01,064 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-25 11:24:01,064 INFO L268 CegarLoopResult]: For program point L13-3(lines 13 15) no Hoare annotation was computed. [2020-09-25 11:24:01,064 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-25 11:24:01,065 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-25 11:24:01,065 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 11:24:01,066 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 11:24:01,066 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 11:24:01,066 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 11:24:01,066 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 11:24:01,066 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 11:24:01,067 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 11:24:01,067 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 11:24:01,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 11:24:01 BoogieIcfgContainer [2020-09-25 11:24:01,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 11:24:01,096 INFO L168 Benchmark]: Toolchain (without parser) took 6970.70 ms. Allocated memory was 138.9 MB in the beginning and 282.6 MB in the end (delta: 143.7 MB). Free memory was 102.3 MB in the beginning and 239.9 MB in the end (delta: -137.6 MB). Peak memory consumption was 150.1 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:01,097 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 11:24:01,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.96 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:01,099 INFO L168 Benchmark]: Boogie Preprocessor took 117.53 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 180.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:01,100 INFO L168 Benchmark]: RCFGBuilder took 269.54 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:01,101 INFO L168 Benchmark]: TraceAbstraction took 6253.74 ms. Allocated memory was 201.9 MB in the beginning and 282.6 MB in the end (delta: 80.7 MB). Free memory was 169.0 MB in the beginning and 239.9 MB in the end (delta: -70.8 MB). Peak memory consumption was 154.0 MB. Max. memory is 7.1 GB. [2020-09-25 11:24:01,104 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 319.96 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.53 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.3 MB in the beginning and 180.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.54 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 169.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6253.74 ms. Allocated memory was 201.9 MB in the beginning and 282.6 MB in the end (delta: 80.7 MB). Free memory was 169.0 MB in the beginning and 239.9 MB in the end (delta: -70.8 MB). Peak memory consumption was 154.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (9 <= i && (sn == 0 || 16 == sn))) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn)) || (sn == 0 && i == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 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, 1.8s 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, 0.0s SatisfiabilityAnalysisTime, 3.5s 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...