/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options 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/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:11:29,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:11:29,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:11:29,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:11:29,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:11:29,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:11:29,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:11:29,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:11:29,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:11:29,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:11:29,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:11:29,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:11:29,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:11:29,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:11:29,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:11:29,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:11:29,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:11:29,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:11:29,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:11:29,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:11:29,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:11:29,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:11:29,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:11:29,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:11:29,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:11:29,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:11:29,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:11:29,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:11:29,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:11:29,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:11:29,643 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:11:29,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:11:29,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:11:29,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:11:29,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:11:29,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:11:29,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:11:29,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:11:29,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:11:29,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:11:29,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:11:29,652 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 [2020-09-24 16:11:29,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:11:29,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:11:29,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:11:29,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:11:29,693 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:11:29,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:11:29,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:11:29,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:11:29,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:11:29,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:11:29,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:11:29,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:11:29,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:11:29,698 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:11:29,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:11:29,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:11:29,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:11:29,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:11:29,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:11:29,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:11:29,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:11:29,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:11:29,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:11:29,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:11:29,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:11:29,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:11:29,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:11:29,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:11:29,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:11:29,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;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; [2020-09-24 16:11:30,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:11:30,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:11:30,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:11:30,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:11:30,234 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:11:30,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-09-24 16:11:30,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8704c61e/dea130efbd70444197bc4ec6aa968e97/FLAG71d26cb72 [2020-09-24 16:11:30,874 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:11:30,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-09-24 16:11:30,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8704c61e/dea130efbd70444197bc4ec6aa968e97/FLAG71d26cb72 [2020-09-24 16:11:31,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f8704c61e/dea130efbd70444197bc4ec6aa968e97 [2020-09-24 16:11:31,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:11:31,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:11:31,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:31,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:11:31,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:11:31,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2719192c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31, skipping insertion in model container [2020-09-24 16:11:31,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:11:31,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:11:31,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:31,543 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:11:31,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:11:31,593 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:11:31,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31 WrapperNode [2020-09-24 16:11:31,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:11:31,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:11:31,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:11:31,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:11:31,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (1/1) ... [2020-09-24 16:11:31,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:11:31,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:11:31,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:11:31,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:11:31,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (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 [2020-09-24 16:11:31,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:11:31,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:11:31,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 16:11:31,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:11:31,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:11:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:11:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 16:11:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 16:11:31,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:11:31,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 16:11:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:11:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:11:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:11:32,088 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:11:32,089 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:11:32,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:32 BoogieIcfgContainer [2020-09-24 16:11:32,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:11:32,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:11:32,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:11:32,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:11:32,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:11:31" (1/3) ... [2020-09-24 16:11:32,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ef815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:32, skipping insertion in model container [2020-09-24 16:11:32,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:11:31" (2/3) ... [2020-09-24 16:11:32,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355ef815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:11:32, skipping insertion in model container [2020-09-24 16:11:32,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:11:32" (3/3) ... [2020-09-24 16:11:32,115 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-09-24 16:11:32,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:11:32,139 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:11:32,163 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:11:32,200 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:11:32,200 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:11:32,201 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:11:32,201 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:11:32,201 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:11:32,201 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:11:32,201 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:11:32,201 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:11:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-24 16:11:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-24 16:11:32,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash -714485069, now seen corresponding path program 1 times [2020-09-24 16:11:32,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511710342] [2020-09-24 16:11:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,388 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,388 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,388 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,388 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 16:11:32,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 16:11:32,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:11:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-24 16:11:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:32,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,492 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,492 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,492 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:32,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:11:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:32,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:11:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:32,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511710342] [2020-09-24 16:11:32,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:32,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 16:11:32,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020086920] [2020-09-24 16:11:32,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:11:32,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:11:32,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:11:32,540 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2020-09-24 16:11:32,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:32,622 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-09-24 16:11:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:11:32,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-24 16:11:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:32,635 INFO L225 Difference]: With dead ends: 37 [2020-09-24 16:11:32,635 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 16:11:32,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:11:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 16:11:32,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-09-24 16:11:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 16:11:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 16:11:32,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-09-24 16:11:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:32,686 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 16:11:32,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:11:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 16:11:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 16:11:32,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:11:32,688 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 673132007, now seen corresponding path program 1 times [2020-09-24 16:11:32,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090969010] [2020-09-24 16:11:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,729 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,729 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,730 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,730 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:11:32,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 16:11:32,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:11:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:32,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 16:11:32,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:32,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,794 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,794 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,794 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,795 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:32,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:32,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:32,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:32,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:32,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:32,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090969010] [2020-09-24 16:11:32,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:32,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:11:32,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051297741] [2020-09-24 16:11:32,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:11:32,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:32,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:11:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:11:32,807 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-24 16:11:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:32,862 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-09-24 16:11:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:11:32,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-24 16:11:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:32,864 INFO L225 Difference]: With dead ends: 26 [2020-09-24 16:11:32,864 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 16:11:32,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:11:32,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 16:11:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-09-24 16:11:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 16:11:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-24 16:11:32,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2020-09-24 16:11:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:32,873 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-24 16:11:32,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:11:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-24 16:11:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 16:11:32,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:32,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:32,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:11:32,875 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:32,876 INFO L82 PathProgramCache]: Analyzing trace with hash 113219123, now seen corresponding path program 2 times [2020-09-24 16:11:32,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:32,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245092562] [2020-09-24 16:11:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:32,920 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:32,920 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:32,920 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 16:11:32,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 16:11:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:32,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 16:11:32,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:33,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,009 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,010 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,010 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245092562] [2020-09-24 16:11:33,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:11:33,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308637542] [2020-09-24 16:11:33,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:11:33,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:11:33,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:11:33,019 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-09-24 16:11:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,093 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 16:11:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:11:33,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-24 16:11:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,095 INFO L225 Difference]: With dead ends: 29 [2020-09-24 16:11:33,095 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 16:11:33,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 16:11:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-24 16:11:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 16:11:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-24 16:11:33,103 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2020-09-24 16:11:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,103 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-24 16:11:33,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:11:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-24 16:11:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 16:11:33,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:11:33,106 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1401469543, now seen corresponding path program 3 times [2020-09-24 16:11:33,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123690682] [2020-09-24 16:11:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,205 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,205 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,206 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,206 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 16:11:33,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-24 16:11:33,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 16:11:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 16:11:33,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:33,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,343 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,343 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,343 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123690682] [2020-09-24 16:11:33,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:11:33,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256406325] [2020-09-24 16:11:33,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:11:33,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:11:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:11:33,364 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 10 states. [2020-09-24 16:11:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,452 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 16:11:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 16:11:33,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-09-24 16:11:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,454 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:11:33,454 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 16:11:33,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:11:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 16:11:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-24 16:11:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 16:11:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-09-24 16:11:33,461 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-09-24 16:11:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,462 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-09-24 16:11:33,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:11:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-09-24 16:11:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 16:11:33,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,463 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:11:33,464 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash -158025293, now seen corresponding path program 4 times [2020-09-24 16:11:33,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907190742] [2020-09-24 16:11:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,507 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,508 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,508 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,508 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 16:11:33,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 16:11:33,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:11:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 16:11:33,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 16:11:33,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,640 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,640 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,640 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,641 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907190742] [2020-09-24 16:11:33,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:11:33,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379080172] [2020-09-24 16:11:33,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:11:33,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:11:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:11:33,649 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2020-09-24 16:11:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:33,746 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-24 16:11:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:11:33,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-09-24 16:11:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:33,748 INFO L225 Difference]: With dead ends: 36 [2020-09-24 16:11:33,748 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 16:11:33,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:11:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 16:11:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-09-24 16:11:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-24 16:11:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-09-24 16:11:33,756 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-09-24 16:11:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:33,756 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-09-24 16:11:33,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:11:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-09-24 16:11:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 16:11:33,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:33,758 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:33,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:11:33,759 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:33,759 INFO L82 PathProgramCache]: Analyzing trace with hash -407443737, now seen corresponding path program 5 times [2020-09-24 16:11:33,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:33,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655463243] [2020-09-24 16:11:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,804 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,804 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,804 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,805 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 16:11:33,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 16:11:33,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 16:11:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 16:11:33,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 16:11:33,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,923 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655463243] [2020-09-24 16:11:33,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:11:33,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-24 16:11:33,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735085602] [2020-09-24 16:11:33,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:11:33,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:11:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:11:33,932 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-09-24 16:11:34,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:34,071 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 16:11:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:11:34,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-09-24 16:11:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:34,072 INFO L225 Difference]: With dead ends: 29 [2020-09-24 16:11:34,072 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 16:11:34,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:11:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 16:11:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 16:11:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 16:11:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 16:11:34,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-09-24 16:11:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:34,074 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 16:11:34,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:11:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 16:11:34,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 16:11:34,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:11:34,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 16:11:34,242 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-24 16:11:34,246 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 16:11:34,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 16:11:34,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 16:11:34,247 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 16:11:34,247 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 16:11:34,247 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 16:11:34,247 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:34,248 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:34,248 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 16:11:34,248 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 16:11:34,248 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 16:11:34,248 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 16:11:34,249 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 16:11:34,250 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (or (and (<= main_~j~0 6) (<= (+ main_~j~0 3) main_~i~0) (<= 6 main_~j~0)) (and (<= 1 main_~i~0) (<= (+ main_~i~0 9) main_~j~0) (<= main_~j~0 10)) (let ((.cse0 (+ main_~i~0 6))) (and (<= main_~j~0 .cse0) (<= .cse0 main_~j~0) (<= 9 main_~j~0) (<= main_~j~0 9))) (let ((.cse1 (+ main_~i~0 3))) (and (<= main_~j~0 8) (<= main_~j~0 .cse1) (<= .cse1 main_~j~0) (<= 8 main_~j~0))) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 main_~j~0))) [2020-09-24 16:11:34,250 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 16:11:34,250 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 20) the Hoare annotation is: (and (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-09-24 16:11:34,251 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-09-24 16:11:34,251 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 16:11:34,251 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 16:11:34,251 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 16:11:34,251 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 16:11:34,251 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 16:11:34,252 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 16:11:34,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:11:34 BoogieIcfgContainer [2020-09-24 16:11:34,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 16:11:34,279 INFO L168 Benchmark]: Toolchain (without parser) took 3026.24 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 102.0 MB in the beginning and 101.4 MB in the end (delta: 631.8 kB). Peak memory consumption was 95.5 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:34,280 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 16:11:34,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:34,283 INFO L168 Benchmark]: Boogie Preprocessor took 119.29 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:34,284 INFO L168 Benchmark]: RCFGBuilder took 378.54 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:34,285 INFO L168 Benchmark]: TraceAbstraction took 2171.98 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 167.8 MB in the beginning and 101.4 MB in the end (delta: 66.4 MB). Peak memory consumption was 98.9 MB. Max. memory is 7.1 GB. [2020-09-24 16:11:34,289 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.29 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.54 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2171.98 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 167.8 MB in the beginning and 101.4 MB in the end (delta: 66.4 MB). Peak memory consumption was 98.9 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((j <= 6 && j + 3 <= i) && 6 <= j) || ((1 <= i && i + 9 <= j) && j <= 10)) || (((j <= i + 6 && i + 6 <= j) && 9 <= j) && j <= 9)) || (((j <= 8 && j <= i + 3) && i + 3 <= j) && 8 <= j)) || (((j <= 7 && 7 <= j) && j <= i) && i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 26 SDslu, 279 SDs, 0 SdLazy, 275 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 84 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 23 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 7623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 35/75 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...