/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:19:04,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:19:04,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:19:04,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:19:04,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:19:04,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:19:04,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:19:04,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:19:04,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:19:04,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:19:04,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:19:04,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:19:04,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:19:04,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:19:04,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:19:04,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:19:04,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:19:04,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:19:04,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:19:04,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:19:04,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:19:04,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:19:04,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:19:04,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:19:04,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:19:04,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:19:04,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:19:04,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:19:04,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:19:04,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:19:04,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:19:04,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:19:04,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:19:04,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:19:04,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:19:04,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:19:04,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:19:04,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:19:04,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:19:04,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:19:04,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:19:04,674 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 02:19:04,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:19:04,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:19:04,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:19:04,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:19:04,728 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:19:04,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:19:04,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:19:04,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:19:04,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:19:04,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:19:04,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:19:04,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:19:04,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:19:04,732 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:19:04,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:19:04,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:19:04,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:19:04,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:19:04,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:19:04,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:19:04,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:19:04,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:04,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:19:04,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:19:04,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:19:04,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:19:04,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:19:04,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:19:04,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:19:04,735 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:19:05,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:19:05,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:19:05,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:19:05,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:19:05,270 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:19:05,271 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 02:19:05,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/571aa355b/f0bc468b89b643de9ab2712fcba8f460/FLAG0842e876e [2020-09-25 02:19:05,978 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:05,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 02:19:05,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/571aa355b/f0bc468b89b643de9ab2712fcba8f460/FLAG0842e876e [2020-09-25 02:19:06,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/571aa355b/f0bc468b89b643de9ab2712fcba8f460 [2020-09-25 02:19:06,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:06,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:06,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:06,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:06,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:06,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47731edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06, skipping insertion in model container [2020-09-25 02:19:06,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:06,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:06,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:06,664 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:06,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:06,694 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:06,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06 WrapperNode [2020-09-25 02:19:06,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:06,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:06,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:06,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:06,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (1/1) ... [2020-09-25 02:19:06,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:06,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:06,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:06,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:06,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (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 02:19:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:19:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:06,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:06,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:07,124 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:07,124 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:19:07,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:07 BoogieIcfgContainer [2020-09-25 02:19:07,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:07,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:07,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:07,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:07,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:06" (1/3) ... [2020-09-25 02:19:07,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592591c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:07, skipping insertion in model container [2020-09-25 02:19:07,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:06" (2/3) ... [2020-09-25 02:19:07,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592591c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:07, skipping insertion in model container [2020-09-25 02:19:07,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:07" (3/3) ... [2020-09-25 02:19:07,139 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-25 02:19:07,148 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:07,158 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:19:07,178 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:19:07,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:07,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:07,208 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:07,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:07,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:07,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:07,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:07,209 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 02:19:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 02:19:07,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:07,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:07,237 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-25 02:19:07,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:07,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530377754] [2020-09-25 02:19:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:19:07,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-25 02:19:07,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 02:19:07,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:19:07,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:07,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:19:07,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,550 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 02:19:07,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530377754] [2020-09-25 02:19:07,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:07,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:19:07,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482550089] [2020-09-25 02:19:07,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:19:07,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:19:07,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:07,578 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-25 02:19:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:07,603 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-25 02:19:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:19:07,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 02:19:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:07,614 INFO L225 Difference]: With dead ends: 35 [2020-09-25 02:19:07,614 INFO L226 Difference]: Without dead ends: 18 [2020-09-25 02:19:07,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:19:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-25 02:19:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-25 02:19:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 02:19:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-25 02:19:07,658 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-25 02:19:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:07,658 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-25 02:19:07,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:19:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-25 02:19:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 02:19:07,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:07,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:07,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:07,661 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-25 02:19:07,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:07,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665239338] [2020-09-25 02:19:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 02:19:07,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:07,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-25 02:19:07,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:07,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:07,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:19:07,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:07,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:07,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:19:07,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:07,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:07,880 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 02:19:07,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665239338] [2020-09-25 02:19:07,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:07,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:19:07,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961299988] [2020-09-25 02:19:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:19:07,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:19:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:07,888 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-25 02:19:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,037 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-25 02:19:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:19:08,038 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-25 02:19:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,039 INFO L225 Difference]: With dead ends: 34 [2020-09-25 02:19:08,039 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 02:19:08,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:19:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 02:19:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-25 02:19:08,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 02:19:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-25 02:19:08,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-25 02:19:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,061 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-25 02:19:08,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:19:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-25 02:19:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 02:19:08,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:08,066 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-25 02:19:08,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418006400] [2020-09-25 02:19:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 02:19:08,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:08,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-09-25 02:19:08,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 02:19:08,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:19:08,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:08,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:08,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:08,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:08,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:08,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418006400] [2020-09-25 02:19:08,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:08,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:19:08,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693532952] [2020-09-25 02:19:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:08,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:08,237 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-25 02:19:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,339 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-09-25 02:19:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:19:08,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 02:19:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,341 INFO L225 Difference]: With dead ends: 32 [2020-09-25 02:19:08,341 INFO L226 Difference]: Without dead ends: 27 [2020-09-25 02:19:08,342 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 02:19:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-25 02:19:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-25 02:19:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 02:19:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 02:19:08,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-09-25 02:19:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:08,349 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 02:19:08,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 02:19:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 02:19:08,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:08,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:08,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:08,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash -425824350, now seen corresponding path program 1 times [2020-09-25 02:19:08,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:08,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104579783] [2020-09-25 02:19:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 02:19:08,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:19:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-09-25 02:19:08,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:19:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:08,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:08,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:08,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:08,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:08,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:08,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:08,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:08,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:08,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:08,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:08,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104579783] [2020-09-25 02:19:08,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:08,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 02:19:08,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360081033] [2020-09-25 02:19:08,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:08,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:08,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:08,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:08,870 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-09-25 02:19:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:08,986 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 02:19:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:19:08,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-25 02:19:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:08,993 INFO L225 Difference]: With dead ends: 48 [2020-09-25 02:19:08,993 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 02:19:08,994 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 02:19:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 02:19:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-09-25 02:19:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-25 02:19:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-25 02:19:09,011 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-09-25 02:19:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,012 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-25 02:19:09,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-25 02:19:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 02:19:09,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:09,015 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1918594294, now seen corresponding path program 2 times [2020-09-25 02:19:09,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338977892] [2020-09-25 02:19:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:19:09,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:09,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-09-25 02:19:09,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:09,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:19:09,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 02:19:09,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:09,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:09,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:09,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:09,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:09,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:09,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:09,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:19:09,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338977892] [2020-09-25 02:19:09,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:09,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:19:09,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607583295] [2020-09-25 02:19:09,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:19:09,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:19:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:09,787 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-09-25 02:19:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:09,898 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-09-25 02:19:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:19:09,900 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 02:19:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:09,904 INFO L225 Difference]: With dead ends: 43 [2020-09-25 02:19:09,904 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 02:19:09,906 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 02:19:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 02:19:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 02:19:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 02:19:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-25 02:19:09,915 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-09-25 02:19:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:09,915 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-25 02:19:09,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:19:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-25 02:19:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:19:09,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:09,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:09,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:09,919 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1311034243, now seen corresponding path program 3 times [2020-09-25 02:19:09,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:09,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596873380] [2020-09-25 02:19:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:09,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:19:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:10,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-09-25 02:19:10,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 02:19:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 02:19:10,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:10,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:10,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:10,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 02:19:10,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596873380] [2020-09-25 02:19:10,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:10,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:19:10,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93623802] [2020-09-25 02:19:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:19:10,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:19:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:10,874 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 7 states. [2020-09-25 02:19:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:10,985 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-25 02:19:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:19:10,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 02:19:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:10,987 INFO L225 Difference]: With dead ends: 61 [2020-09-25 02:19:10,987 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 02:19:10,988 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 02:19:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 02:19:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-25 02:19:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 02:19:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 02:19:10,994 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2020-09-25 02:19:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:10,995 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 02:19:10,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:19:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 02:19:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 02:19:11,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:11,001 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:11,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:11,002 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:11,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 4 times [2020-09-25 02:19:11,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:11,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270666776] [2020-09-25 02:19:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:11,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:11,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 02:19:11,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:11,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 860 [2020-09-25 02:19:11,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:11,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:19:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:11,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:19:11,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:11,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:11,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:11,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:19:11,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 02:19:11,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270666776] [2020-09-25 02:19:11,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:11,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:19:11,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864782754] [2020-09-25 02:19:11,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:19:11,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:19:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:19:11,980 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 9 states. [2020-09-25 02:19:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:12,142 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 02:19:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:19:12,143 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-09-25 02:19:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:12,145 INFO L225 Difference]: With dead ends: 54 [2020-09-25 02:19:12,145 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 02:19:12,148 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 02:19:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 02:19:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 02:19:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 02:19:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-25 02:19:12,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-09-25 02:19:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:12,165 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-25 02:19:12,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:19:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-25 02:19:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 02:19:12,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:12,174 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:12,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:12,174 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:12,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:12,175 INFO L82 PathProgramCache]: Analyzing trace with hash 350505490, now seen corresponding path program 5 times [2020-09-25 02:19:12,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:12,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076354618] [2020-09-25 02:19:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:12,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:12,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 02:19:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:19:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-09-25 02:19:12,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:12,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:19:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 02:19:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:13,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:13,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 47 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 02:19:13,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076354618] [2020-09-25 02:19:13,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:19:13,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686443359] [2020-09-25 02:19:13,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:19:13,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:19:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:19:13,025 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 11 states. [2020-09-25 02:19:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:13,247 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-09-25 02:19:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:19:13,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-09-25 02:19:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:13,250 INFO L225 Difference]: With dead ends: 59 [2020-09-25 02:19:13,251 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 02:19:13,251 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 02:19:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 02:19:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-25 02:19:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:19:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 02:19:13,258 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 45 [2020-09-25 02:19:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:13,258 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 02:19:13,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:19:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 02:19:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 02:19:13,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:13,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:13,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:19:13,261 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 6 times [2020-09-25 02:19:13,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:13,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027109595] [2020-09-25 02:19:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 02:19:13,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:13,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-09-25 02:19:13,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:19:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:13,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:19:13,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:13,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:13,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:13,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:13,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:19:13,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:13,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 02:19:13,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:13,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:13,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:13,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 59 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 02:19:13,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027109595] [2020-09-25 02:19:13,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:13,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:19:13,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496403656] [2020-09-25 02:19:13,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:19:13,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:19:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:19:13,896 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2020-09-25 02:19:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:14,159 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-25 02:19:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:19:14,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-09-25 02:19:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:14,162 INFO L225 Difference]: With dead ends: 61 [2020-09-25 02:19:14,162 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 02:19:14,163 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 02:19:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 02:19:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 02:19:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 02:19:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-25 02:19:14,170 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-25 02:19:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:14,170 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-25 02:19:14,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:19:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-25 02:19:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 02:19:14,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:14,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:14,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:19:14,173 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 7 times [2020-09-25 02:19:14,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:14,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400348508] [2020-09-25 02:19:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 02:19:14,187 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 02:19:14,188 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 02:19:14,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:19:14,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:19:14 BoogieIcfgContainer [2020-09-25 02:19:14,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:19:14,225 INFO L168 Benchmark]: Toolchain (without parser) took 7857.15 ms. Allocated memory was 141.0 MB in the beginning and 273.2 MB in the end (delta: 132.1 MB). Free memory was 104.2 MB in the beginning and 125.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,226 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.82 ms. Allocated memory is still 141.0 MB. Free memory was 103.4 MB in the beginning and 94.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,229 INFO L168 Benchmark]: Boogie Preprocessor took 119.30 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 94.2 MB in the beginning and 180.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,229 INFO L168 Benchmark]: RCFGBuilder took 313.02 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 169.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,230 INFO L168 Benchmark]: TraceAbstraction took 7090.88 ms. Allocated memory was 201.9 MB in the beginning and 273.2 MB in the end (delta: 71.3 MB). Free memory was 168.1 MB in the beginning and 125.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:14,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.1 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.82 ms. Allocated memory is still 141.0 MB. Free memory was 103.4 MB in the beginning and 94.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.30 ms. Allocated memory was 141.0 MB in the beginning and 201.9 MB in the end (delta: 60.8 MB). Free memory was 94.2 MB in the beginning and 180.7 MB in the end (delta: -86.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.02 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 169.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7090.88 ms. Allocated memory was 201.9 MB in the beginning and 273.2 MB in the end (delta: 71.3 MB). Free memory was 168.1 MB in the beginning and 125.8 MB in the end (delta: 42.3 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.9s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 102 SDslu, 405 SDs, 0 SdLazy, 273 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 318 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 254 ConstructedInterpolants, 0 QuantifiedInterpolants, 16154 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 217/319 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...