/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:05,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:05,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:05,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:05,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:05,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:05,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:05,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:05,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:05,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:05,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:05,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:05,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:05,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:05,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:05,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:05,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:05,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:05,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:05,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:05,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:05,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:05,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:05,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:05,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:05,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:05,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:05,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:05,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:05,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:05,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:05,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:05,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:05,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:05,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:05,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:05,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:05,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:05,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:05,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:05,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:05,637 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 [2020-09-21 11:32:05,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:05,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:05,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:05,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:05,687 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:05,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:05,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:05,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:05,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:05,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:05,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:05,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:05,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:05,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:05,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:05,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:05,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:05,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:05,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:05,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:05,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:05,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:05,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:05,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:05,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:05,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:05,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:05,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:05,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:05,694 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:06,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:06,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:06,155 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:06,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:06,158 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:06,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-21 11:32:06,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47d93ed/cd734db0aca44b79901550d3a2ad5965/FLAGe24c53e86 [2020-09-21 11:32:06,815 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:06,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-21 11:32:06,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47d93ed/cd734db0aca44b79901550d3a2ad5965/FLAGe24c53e86 [2020-09-21 11:32:07,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f47d93ed/cd734db0aca44b79901550d3a2ad5965 [2020-09-21 11:32:07,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:07,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:07,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:07,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:07,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:07,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c95a901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07, skipping insertion in model container [2020-09-21 11:32:07,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:07,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:07,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:07,483 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:07,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:07,523 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:07,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07 WrapperNode [2020-09-21 11:32:07,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:07,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:07,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:07,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:07,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (1/1) ... [2020-09-21 11:32:07,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:07,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:07,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:07,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:07,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (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 [2020-09-21 11:32:07,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:07,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:07,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:07,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:07,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:07,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:07,982 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:07,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:07 BoogieIcfgContainer [2020-09-21 11:32:07,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:07,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:07,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:07,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:07,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:07" (1/3) ... [2020-09-21 11:32:07,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a748656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:07, skipping insertion in model container [2020-09-21 11:32:07,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:07" (2/3) ... [2020-09-21 11:32:07,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a748656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:07, skipping insertion in model container [2020-09-21 11:32:07,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:07" (3/3) ... [2020-09-21 11:32:07,998 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-09-21 11:32:08,013 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:08,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:08,072 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:08,119 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:08,119 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:08,119 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:08,120 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:08,120 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:08,120 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:08,120 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:08,120 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-21 11:32:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:08,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-09-21 11:32:08,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012467927] [2020-09-21 11:32:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,276 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,276 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,276 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,277 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:08,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:32:08,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:08,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:08,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,313 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,313 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,314 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,314 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:08,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:08,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012467927] [2020-09-21 11:32:08,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:08,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:08,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787931853] [2020-09-21 11:32:08,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:08,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:08,354 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-21 11:32:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,378 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-09-21 11:32:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:08,379 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-21 11:32:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,389 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:32:08,390 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 11:32:08,394 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 [2020-09-21 11:32:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 11:32:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 11:32:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:32:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-09-21 11:32:08,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-09-21 11:32:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,436 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-09-21 11:32:08,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-09-21 11:32:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:32:08,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:08,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-09-21 11:32:08,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398237193] [2020-09-21 11:32:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,465 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,467 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:32:08,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 11:32:08,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:08,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,512 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,513 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,513 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,513 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:08,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398237193] [2020-09-21 11:32:08,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:08,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:08,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286442909] [2020-09-21 11:32:08,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:08,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:08,530 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-09-21 11:32:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,545 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-09-21 11:32:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:08,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-21 11:32:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,547 INFO L225 Difference]: With dead ends: 24 [2020-09-21 11:32:08,547 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 11:32:08,548 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 [2020-09-21 11:32:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 11:32:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 11:32:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:32:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-09-21 11:32:08,554 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-09-21 11:32:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,554 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-09-21 11:32:08,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-09-21 11:32:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:32:08,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:08,555 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-09-21 11:32:08,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034214781] [2020-09-21 11:32:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,655 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,656 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,656 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,656 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:32:08,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-21 11:32:08,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:08,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:32:08,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,883 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,884 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,884 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:08,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:08,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:08,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:08,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:08,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034214781] [2020-09-21 11:32:08,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:08,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:08,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966737395] [2020-09-21 11:32:08,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:08,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:08,894 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-09-21 11:32:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:08,929 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-09-21 11:32:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:08,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:32:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:08,930 INFO L225 Difference]: With dead ends: 23 [2020-09-21 11:32:08,930 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:32:08,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:32:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:32:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:32:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-09-21 11:32:08,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-09-21 11:32:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:08,937 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-09-21 11:32:08,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-09-21 11:32:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:08,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:08,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:08,939 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-09-21 11:32:08,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:08,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973453024] [2020-09-21 11:32:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,988 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,988 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,989 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,989 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:08,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:32:08,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,206 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,206 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,207 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,208 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:32:09,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:09,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973453024] [2020-09-21 11:32:09,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:09,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:32:09,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697776818] [2020-09-21 11:32:09,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:32:09,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:32:09,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:09,227 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-09-21 11:32:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:09,252 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-09-21 11:32:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:32:09,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-21 11:32:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:09,255 INFO L225 Difference]: With dead ends: 26 [2020-09-21 11:32:09,256 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:32:09,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:32:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:32:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:32:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:32:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-21 11:32:09,267 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2020-09-21 11:32:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:09,267 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-21 11:32:09,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:32:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-21 11:32:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:09,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:09,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:09,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:09,271 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-09-21 11:32:09,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:09,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833287495] [2020-09-21 11:32:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,399 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,399 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,399 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 11:32:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:32:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,622 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,623 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,623 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,623 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:09,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:09,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:09,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833287495] [2020-09-21 11:32:09,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:09,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:09,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383364830] [2020-09-21 11:32:09,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:09,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:09,639 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-09-21 11:32:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:09,760 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-09-21 11:32:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:09,763 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-21 11:32:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:09,764 INFO L225 Difference]: With dead ends: 26 [2020-09-21 11:32:09,764 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:32:09,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:32:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 11:32:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:32:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-21 11:32:09,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2020-09-21 11:32:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:09,773 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-21 11:32:09,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-21 11:32:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 11:32:09,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:09,775 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:09,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:09,776 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:09,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-09-21 11:32:09,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:09,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141658541] [2020-09-21 11:32:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,940 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,941 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,941 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,941 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 11:32:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-21 11:32:09,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:09,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:09,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:32:09,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,172 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,172 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,172 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,172 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:10,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:10,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:10,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141658541] [2020-09-21 11:32:10,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:10,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:10,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446471978] [2020-09-21 11:32:10,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:10,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:10,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:10,180 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-09-21 11:32:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,317 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-21 11:32:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:10,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-09-21 11:32:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,318 INFO L225 Difference]: With dead ends: 29 [2020-09-21 11:32:10,318 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:32:10,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:32:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-21 11:32:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:32:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-21 11:32:10,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2020-09-21 11:32:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:10,324 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-21 11:32:10,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-21 11:32:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:32:10,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:10,325 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:10,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:10,325 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1396202070, now seen corresponding path program 3 times [2020-09-21 11:32:10,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:10,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850481467] [2020-09-21 11:32:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,454 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,454 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,454 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,455 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:32:10,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-21 11:32:10,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:32:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:10,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 11:32:10,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,914 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,914 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,915 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,915 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:10,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:10,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:10,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:10,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:10,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:10,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850481467] [2020-09-21 11:32:10,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:10,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:32:10,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081634884] [2020-09-21 11:32:10,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:32:10,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:32:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:10,924 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 11 states. [2020-09-21 11:32:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:11,162 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-09-21 11:32:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:32:11,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-09-21 11:32:11,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:11,164 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:32:11,164 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:32:11,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:32:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 11:32:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:32:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-21 11:32:11,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-09-21 11:32:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:11,169 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-21 11:32:11,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:32:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-21 11:32:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 11:32:11,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:11,171 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:11,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:11,171 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash -480947253, now seen corresponding path program 4 times [2020-09-21 11:32:11,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:11,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515244888] [2020-09-21 11:32:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,341 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,342 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,342 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,342 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:32:11,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-21 11:32:11,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:32:11,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:11,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:32:11,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:11,610 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:11,610 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:11,611 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:11,611 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:11,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:11,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:11,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:11,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:11,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515244888] [2020-09-21 11:32:11,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:11,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:32:11,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921286783] [2020-09-21 11:32:11,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:32:11,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:32:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:11,622 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2020-09-21 11:32:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:11,856 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-21 11:32:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:32:11,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-09-21 11:32:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:11,857 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:32:11,857 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:32:11,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:32:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:32:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-21 11:32:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:32:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-09-21 11:32:11,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-09-21 11:32:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:11,867 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-09-21 11:32:11,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:32:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-09-21 11:32:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:32:11,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:11,868 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:11,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:32:11,869 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 5 times [2020-09-21 11:32:11,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:11,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207774369] [2020-09-21 11:32:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,195 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,196 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,196 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,196 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:32:12,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-21 11:32:12,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,529 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,529 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,529 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,529 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:12,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207774369] [2020-09-21 11:32:12,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:12,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:32:12,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325506759] [2020-09-21 11:32:12,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:32:12,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:12,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:32:12,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:32:12,537 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-09-21 11:32:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:29,573 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-21 11:32:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:32:29,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-09-21 11:32:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:29,578 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:32:29,578 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:32:29,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=41, Invalid=261, Unknown=4, NotChecked=0, Total=306 [2020-09-21 11:32:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:32:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-21 11:32:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:32:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-21 11:32:29,584 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2020-09-21 11:32:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:29,585 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-21 11:32:29,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:32:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-21 11:32:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 11:32:29,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:29,586 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:29,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:32:29,586 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:29,587 INFO L82 PathProgramCache]: Analyzing trace with hash -74401941, now seen corresponding path program 6 times [2020-09-21 11:32:29,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:29,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734863701] [2020-09-21 11:32:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:29,944 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:30,404 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:30,405 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:30,405 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:30,405 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:30,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:30,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:30,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:30,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734863701] [2020-09-21 11:32:30,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:30,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:32:30,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722605330] [2020-09-21 11:32:30,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:32:30,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:32:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:32:30,415 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 17 states. [2020-09-21 11:32:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:32,886 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-21 11:32:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:32:32,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-09-21 11:32:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:32,888 INFO L225 Difference]: With dead ends: 41 [2020-09-21 11:32:32,888 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 11:32:32,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:32:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 11:32:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-21 11:32:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:32:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-21 11:32:32,893 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2020-09-21 11:32:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:32,893 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-21 11:32:32,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:32:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-21 11:32:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:32:32,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:32,895 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:32,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:32:32,895 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1006526058, now seen corresponding path program 7 times [2020-09-21 11:32:32,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:32,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728078314] [2020-09-21 11:32:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:33,278 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:33,279 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:33,279 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:33,279 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:33,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:32:33,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:33,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-09-21 11:32:33,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:32:33,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:33,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:32:33,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:33,638 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-09-21 11:32:34,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:34,720 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:34,720 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:34,721 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:34,721 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:34,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:34,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:34,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:34,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:34,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:34,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:34,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:34,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728078314] [2020-09-21 11:32:34,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:34,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:32:34,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683330213] [2020-09-21 11:32:34,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:32:34,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:34,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:32:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:32:34,737 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2020-09-21 11:32:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:35,113 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-21 11:32:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:35,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-09-21 11:32:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:35,114 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:32:35,114 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:35,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:32:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:35,116 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-09-21 11:32:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:35,116 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:35,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:32:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:35,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:35,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:32:35,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:35,257 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:35,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:35,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:35,257 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:35,257 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:35,257 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-09-21 11:32:35,258 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-09-21 11:32:35,259 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-09-21 11:32:35,259 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-09-21 11:32:35,259 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-21 11:32:35,259 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-09-21 11:32:35,259 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-09-21 11:32:35,259 INFO L268 CegarLoopResult]: For program point L24-2(lines 13 38) no Hoare annotation was computed. [2020-09-21 11:32:35,261 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (let ((.cse6 (div main_~b~0 4294967296)) (.cse5 (div main_~a~0 4294967296))) (let ((.cse2 (* 4294967296 .cse5)) (.cse4 (* 4294967296 .cse6))) (let ((.cse1 (+ .cse4 main_~a~0)) (.cse3 (+ .cse2 main_~b~0))) (or (and (<= main_~i~0 (let ((.cse0 (div main_~i~0 2))) (+ (* 4294967296 (div (+ main_~i~0 (* .cse0 (- 2))) 4294967296)) (* 2 .cse0)))) (< .cse1 (+ .cse2 main_~b~0 1)) (<= .cse3 .cse1)) (and (< .cse3 (+ .cse4 main_~a~0 1)) (<= .cse1 .cse3) (<= .cse5 .cse6)))))) [2020-09-21 11:32:35,261 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 11:32:35,261 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:35,261 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:32:35,262 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 11:32:35,262 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:35,262 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:32:35,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:35 BoogieIcfgContainer [2020-09-21 11:32:35,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:35,275 INFO L168 Benchmark]: Toolchain (without parser) took 28055.15 ms. Allocated memory was 141.0 MB in the beginning and 289.4 MB in the end (delta: 148.4 MB). Free memory was 104.1 MB in the beginning and 190.8 MB in the end (delta: -86.7 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:35,277 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:32:35,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.80 ms. Allocated memory is still 141.0 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:35,283 INFO L168 Benchmark]: Boogie Preprocessor took 117.44 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:35,284 INFO L168 Benchmark]: RCFGBuilder took 344.32 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 168.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:35,286 INFO L168 Benchmark]: TraceAbstraction took 27284.16 ms. Allocated memory was 203.4 MB in the beginning and 289.4 MB in the end (delta: 86.0 MB). Free memory was 167.4 MB in the beginning and 190.8 MB in the end (delta: -23.4 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:35,300 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.80 ms. Allocated memory is still 141.0 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.44 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.32 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 168.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27284.16 ms. Allocated memory was 203.4 MB in the beginning and 289.4 MB in the end (delta: 86.0 MB). Free memory was 167.4 MB in the beginning and 190.8 MB in the end (delta: -23.4 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27.0s, OverallIterations: 11, TraceHistogramMax: 8, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 171 SDtfs, 44 SDslu, 943 SDs, 0 SdLazy, 677 SolverSat, 16 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 12.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=10, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 16 PreInvPairs, 20 NumberOfFragments, 96 HoareAnnotationTreeSize, 16 FomulaSimplifications, 58 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 93 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 218 ConstructedInterpolants, 0 QuantifiedInterpolants, 101131 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 4/226 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...