/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:41,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:41,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:41,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:41,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:41,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:41,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:41,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:41,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:41,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:41,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:41,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:41,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:41,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:41,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:41,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:41,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:41,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:41,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:41,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:41,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:41,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:41,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:41,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:41,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:41,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:41,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:41,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:41,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:41,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:41,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:41,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:41,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:41,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:41,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:41,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:41,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:41,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:41,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:41,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:41,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:41,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 01:09:41,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:41,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:41,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:41,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:41,686 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:41,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:41,691 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:41,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:41,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:41,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:41,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:41,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:41,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:41,693 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:41,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:41,693 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:41,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:41,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:41,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:41,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:41,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:41,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:41,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:41,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:41,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:41,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:41,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:41,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:41,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:41,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 01:09:42,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:42,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:42,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:42,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:42,247 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:42,249 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 01:09:42,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d20250ea3/40b3cb19cc3b446085be6576bec46439/FLAG6fa8953ab [2020-09-25 01:09:42,862 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:42,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-09-25 01:09:42,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d20250ea3/40b3cb19cc3b446085be6576bec46439/FLAG6fa8953ab [2020-09-25 01:09:43,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d20250ea3/40b3cb19cc3b446085be6576bec46439 [2020-09-25 01:09:43,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:43,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:43,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:43,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:43,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:43,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43, skipping insertion in model container [2020-09-25 01:09:43,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:43,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:43,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:43,566 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:43,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:43,602 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:43,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43 WrapperNode [2020-09-25 01:09:43,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:43,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:43,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:43,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:43,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... [2020-09-25 01:09:43,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:43,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:43,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:43,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:43,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:43,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:43,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:43,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:43,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:43,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 01:09:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:43,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:44,049 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:44,049 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:09:44,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:44 BoogieIcfgContainer [2020-09-25 01:09:44,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:44,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:44,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:44,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:44,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:43" (1/3) ... [2020-09-25 01:09:44,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4dfacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:44, skipping insertion in model container [2020-09-25 01:09:44,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:43" (2/3) ... [2020-09-25 01:09:44,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4dfacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:44, skipping insertion in model container [2020-09-25 01:09:44,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:44" (3/3) ... [2020-09-25 01:09:44,066 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-09-25 01:09:44,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:44,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:44,148 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:44,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:44,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:44,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:44,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:44,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:44,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:44,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:44,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 01:09:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 01:09:44,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:44,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:44,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 79158399, now seen corresponding path program 1 times [2020-09-25 01:09:44,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:44,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218217450] [2020-09-25 01:09:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:44,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 01:09:44,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:44,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-09-25 01:09:44,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 01:09:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:44,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:09:44,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:44,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:44,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:44,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:44,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:44,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:44,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218217450] [2020-09-25 01:09:44,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:44,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:09:44,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713761871] [2020-09-25 01:09:44,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:09:44,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:44,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:09:44,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:44,702 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-09-25 01:09:44,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:44,734 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 01:09:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:09:44,735 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-09-25 01:09:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:44,745 INFO L225 Difference]: With dead ends: 41 [2020-09-25 01:09:44,745 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 01:09:44,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 01:09:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-25 01:09:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:09:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 01:09:44,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 01:09:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:44,807 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 01:09:44,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:09:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 01:09:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 01:09:44,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:44,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:44,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:44,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash 62535021, now seen corresponding path program 1 times [2020-09-25 01:09:44,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:44,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698032538] [2020-09-25 01:09:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 01:09:44,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:44,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-25 01:09:44,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 01:09:44,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:45,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:45,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:45,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:45,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698032538] [2020-09-25 01:09:45,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:45,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:09:45,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337119762] [2020-09-25 01:09:45,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:45,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:45,079 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2020-09-25 01:09:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:45,150 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-25 01:09:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:45,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 01:09:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:45,153 INFO L225 Difference]: With dead ends: 38 [2020-09-25 01:09:45,153 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 01:09:45,154 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 [2020-09-25 01:09:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 01:09:45,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 01:09:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 01:09:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 01:09:45,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 15 [2020-09-25 01:09:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:45,163 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 01:09:45,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 01:09:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 01:09:45,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:45,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:45,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:45,166 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 268436001, now seen corresponding path program 1 times [2020-09-25 01:09:45,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:45,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790733442] [2020-09-25 01:09:45,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 01:09:45,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-09-25 01:09:45,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:45,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 01:09:45,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:45,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:45,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:45,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:45,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:45,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:45,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790733442] [2020-09-25 01:09:45,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:45,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:45,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961564615] [2020-09-25 01:09:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:45,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:45,961 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-09-25 01:09:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:46,221 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 01:09:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 01:09:46,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-09-25 01:09:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:46,225 INFO L225 Difference]: With dead ends: 60 [2020-09-25 01:09:46,226 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 01:09:46,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:09:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 01:09:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-25 01:09:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 01:09:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 01:09:46,238 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-09-25 01:09:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:46,238 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 01:09:46,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 01:09:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 01:09:46,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:46,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:46,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:46,241 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -635017609, now seen corresponding path program 1 times [2020-09-25 01:09:46,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:46,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391679848] [2020-09-25 01:09:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:46,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 01:09:46,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-09-25 01:09:46,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 01:09:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:46,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:09:46,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:46,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:46,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:46,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:46,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391679848] [2020-09-25 01:09:46,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:46,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:09:46,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556223626] [2020-09-25 01:09:46,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:09:46,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:46,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:09:46,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:09:46,471 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-09-25 01:09:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:46,593 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-09-25 01:09:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:09:46,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-09-25 01:09:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:46,595 INFO L225 Difference]: With dead ends: 60 [2020-09-25 01:09:46,595 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 01:09:46,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 01:09:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-25 01:09:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 01:09:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-25 01:09:46,603 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-25 01:09:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:46,604 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-25 01:09:46,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:09:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-25 01:09:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 01:09:46,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:46,605 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:46,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:46,606 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1260601325, now seen corresponding path program 2 times [2020-09-25 01:09:46,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:46,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398458705] [2020-09-25 01:09:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 01:09:46,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-25 01:09:46,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 01:09:46,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:46,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 01:09:46,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:47,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:47,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 01:09:47,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398458705] [2020-09-25 01:09:47,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:47,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 01:09:47,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310450506] [2020-09-25 01:09:47,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 01:09:47,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 01:09:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:47,279 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-09-25 01:09:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:47,658 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-25 01:09:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:09:47,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-25 01:09:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:47,660 INFO L225 Difference]: With dead ends: 54 [2020-09-25 01:09:47,660 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 01:09:47,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:09:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 01:09:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-09-25 01:09:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 01:09:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-25 01:09:47,668 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2020-09-25 01:09:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:47,669 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-25 01:09:47,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 01:09:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-25 01:09:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 01:09:47,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:47,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:47,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:47,671 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1220208573, now seen corresponding path program 2 times [2020-09-25 01:09:47,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:47,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-09-25 01:09:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 01:09:47,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-09-25 01:09:47,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 01:09:47,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:47,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 01:09:47,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:48,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:48,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:48,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:48,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:48,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306708694] [2020-09-25 01:09:48,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:48,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:09:48,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691701238] [2020-09-25 01:09:48,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:09:48,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:09:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:09:48,133 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2020-09-25 01:09:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,378 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-09-25 01:09:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 01:09:48,379 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-09-25 01:09:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,380 INFO L225 Difference]: With dead ends: 70 [2020-09-25 01:09:48,380 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 01:09:48,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:09:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 01:09:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-09-25 01:09:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 01:09:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-25 01:09:48,388 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 41 [2020-09-25 01:09:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,389 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-25 01:09:48,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:09:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-25 01:09:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 01:09:48,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:48,391 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 765701111, now seen corresponding path program 3 times [2020-09-25 01:09:48,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001712781] [2020-09-25 01:09:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 01:09:48,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-25 01:09:48,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 01:09:48,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:48,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 01:09:48,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:49,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:49,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:49,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:49,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:49,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001712781] [2020-09-25 01:09:49,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:49,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 01:09:49,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523403145] [2020-09-25 01:09:49,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 01:09:49,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 01:09:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:09:49,046 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2020-09-25 01:09:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:49,353 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-09-25 01:09:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 01:09:49,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-09-25 01:09:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:49,355 INFO L225 Difference]: With dead ends: 79 [2020-09-25 01:09:49,355 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 01:09:49,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2020-09-25 01:09:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 01:09:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 01:09:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 01:09:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-09-25 01:09:49,384 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2020-09-25 01:09:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:49,384 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-09-25 01:09:49,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 01:09:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-09-25 01:09:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 01:09:49,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:49,386 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:49,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:49,386 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:49,387 INFO L82 PathProgramCache]: Analyzing trace with hash -258080061, now seen corresponding path program 4 times [2020-09-25 01:09:49,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:49,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540394723] [2020-09-25 01:09:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 01:09:49,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-09-25 01:09:49,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 01:09:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:49,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 01:09:49,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:50,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:50,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:50,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:50,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 29 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:50,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540394723] [2020-09-25 01:09:50,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:50,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 01:09:50,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051503990] [2020-09-25 01:09:50,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 01:09:50,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 01:09:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:09:50,273 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-09-25 01:09:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:50,659 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2020-09-25 01:09:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 01:09:50,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-09-25 01:09:50,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:50,661 INFO L225 Difference]: With dead ends: 87 [2020-09-25 01:09:50,661 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 01:09:50,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 01:09:50,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 01:09:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-09-25 01:09:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 01:09:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-09-25 01:09:50,670 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 59 [2020-09-25 01:09:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:50,670 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-09-25 01:09:50,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 01:09:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-09-25 01:09:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 01:09:50,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:50,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:50,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:09:50,672 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:50,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1030394231, now seen corresponding path program 5 times [2020-09-25 01:09:50,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:50,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101757861] [2020-09-25 01:09:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:09:50,694 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:09:50,694 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:09:50,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:09:50,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:50 BoogieIcfgContainer [2020-09-25 01:09:50,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:50,726 INFO L168 Benchmark]: Toolchain (without parser) took 7511.79 ms. Allocated memory was 146.3 MB in the beginning and 283.6 MB in the end (delta: 137.4 MB). Free memory was 102.9 MB in the beginning and 243.7 MB in the end (delta: -140.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 01:09:50,727 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:50,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.14 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 92.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:50,729 INFO L168 Benchmark]: Boogie Preprocessor took 130.00 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 92.5 MB in the beginning and 181.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:50,730 INFO L168 Benchmark]: RCFGBuilder took 321.14 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 169.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:50,731 INFO L168 Benchmark]: TraceAbstraction took 6666.33 ms. Allocated memory was 202.9 MB in the beginning and 283.6 MB in the end (delta: 80.7 MB). Free memory was 168.9 MB in the beginning and 243.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:50,734 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 385.14 ms. Allocated memory is still 146.3 MB. Free memory was 102.3 MB in the beginning and 92.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.00 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 92.5 MB in the beginning and 181.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 321.14 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 169.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6666.33 ms. Allocated memory was 202.9 MB in the beginning and 283.6 MB in the end (delta: 80.7 MB). Free memory was 168.9 MB in the beginning and 243.7 MB in the end (delta: -74.8 MB). Peak memory consumption was 5.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i