/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/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:34,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:34,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:34,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:34,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:34,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:34,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:34,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:34,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:34,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:34,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:34,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:34,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:34,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:34,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:34,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:34,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:34,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:34,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:34,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:34,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:34,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:34,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:34,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:35,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:35,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:35,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:35,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:35,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:35,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:35,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:35,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:35,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:35,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:35,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:35,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:35,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:35,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:35,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:35,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:35,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:35,031 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 01:09:35,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:35,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:35,059 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:35,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:35,060 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:35,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:35,060 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:35,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:35,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:35,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:35,061 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:35,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:35,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:35,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:35,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:35,062 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:35,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:35,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:35,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:35,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:35,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:35,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:35,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:35,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:35,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:35,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:35,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:35,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:35,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:35,065 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 01:09:35,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:35,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:35,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:35,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:35,590 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:35,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-09-25 01:09:35,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9284d316c/bf58aec91a3c4c82a8ee750e4f4be8bd/FLAG2f4e03c5e [2020-09-25 01:09:36,242 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:36,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-09-25 01:09:36,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9284d316c/bf58aec91a3c4c82a8ee750e4f4be8bd/FLAG2f4e03c5e [2020-09-25 01:09:36,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9284d316c/bf58aec91a3c4c82a8ee750e4f4be8bd [2020-09-25 01:09:36,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:36,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:36,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:36,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:36,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:36,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:36,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fad44cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36, skipping insertion in model container [2020-09-25 01:09:36,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:36,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:36,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:36,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:36,922 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:36,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:36,967 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:36,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36 WrapperNode [2020-09-25 01:09:36,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:36,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:36,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:36,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:36,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:36,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (1/1) ... [2020-09-25 01:09:37,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:37,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:37,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:37,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:37,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (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 01:09:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:37,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 01:09:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:37,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:37,367 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:37,368 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:09:37,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:37 BoogieIcfgContainer [2020-09-25 01:09:37,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:37,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:37,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:37,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:37,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:36" (1/3) ... [2020-09-25 01:09:37,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b05e988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:37, skipping insertion in model container [2020-09-25 01:09:37,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:36" (2/3) ... [2020-09-25 01:09:37,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b05e988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:37, skipping insertion in model container [2020-09-25 01:09:37,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:37" (3/3) ... [2020-09-25 01:09:37,390 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-09-25 01:09:37,425 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:37,451 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:37,489 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:37,519 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:37,520 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:37,520 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:37,520 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:37,520 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:37,520 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:37,521 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:37,521 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-25 01:09:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 01:09:37,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:37,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:37,550 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1430370880, now seen corresponding path program 1 times [2020-09-25 01:09:37,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:37,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16657802] [2020-09-25 01:09:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:37,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:37,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 01:09:37,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:37,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 01:09:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:09:37,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:37,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:37,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:37,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:37,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:37,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:37,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:37,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:37,827 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 01:09:37,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16657802] [2020-09-25 01:09:37,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:37,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:09:37,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358539964] [2020-09-25 01:09:37,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:09:37,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:37,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:09:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:37,858 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-09-25 01:09:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:37,888 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-09-25 01:09:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:09:37,890 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-25 01:09:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:37,901 INFO L225 Difference]: With dead ends: 40 [2020-09-25 01:09:37,902 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 01:09:37,908 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 01:09:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 01:09:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 01:09:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 01:09:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-25 01:09:37,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2020-09-25 01:09:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:37,974 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-25 01:09:37,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:09:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-25 01:09:37,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-25 01:09:37,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:37,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:37,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:37,978 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1911322683, now seen corresponding path program 1 times [2020-09-25 01:09:37,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:37,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267427701] [2020-09-25 01:09:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:38,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:38,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 01:09:38,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 01:09:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:38,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:09:38,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 01:09:38,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:38,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:38,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:38,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:38,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:38,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:38,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:38,264 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 01:09:38,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267427701] [2020-09-25 01:09:38,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:38,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:09:38,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333061614] [2020-09-25 01:09:38,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:38,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:38,269 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-25 01:09:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:38,340 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-25 01:09:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:38,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-25 01:09:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:38,342 INFO L225 Difference]: With dead ends: 45 [2020-09-25 01:09:38,343 INFO L226 Difference]: Without dead ends: 27 [2020-09-25 01:09:38,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:09:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-25 01:09:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-25 01:09:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:09:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 01:09:38,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2020-09-25 01:09:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:38,353 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 01:09:38,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 01:09:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 01:09:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:38,354 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] [2020-09-25 01:09:38,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:38,355 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash -4953541, now seen corresponding path program 1 times [2020-09-25 01:09:38,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:38,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944911892] [2020-09-25 01:09:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:38,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:38,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 01:09:38,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:38,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-09-25 01:09:38,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:38,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:38,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:09:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:38,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:38,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:38,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:38,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:38,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:38,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:38,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:38,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:38,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:38,880 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 01:09:38,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944911892] [2020-09-25 01:09:38,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:38,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:09:38,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185151098] [2020-09-25 01:09:38,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:09:38,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:38,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:09:38,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:38,884 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-25 01:09:38,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:38,991 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-09-25 01:09:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 01:09:38,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-25 01:09:38,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:38,993 INFO L225 Difference]: With dead ends: 52 [2020-09-25 01:09:38,993 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 01:09:38,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:09:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 01:09:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-09-25 01:09:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 01:09:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-25 01:09:39,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-09-25 01:09:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:39,001 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-25 01:09:39,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:09:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-25 01:09:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 01:09:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:39,003 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] [2020-09-25 01:09:39,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:39,004 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 628881157, now seen corresponding path program 2 times [2020-09-25 01:09:39,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:39,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640259837] [2020-09-25 01:09:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:39,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:39,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:39,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 01:09:39,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:39,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-25 01:09:39,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:39,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:39,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:09:39,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:39,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:39,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:39,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:39,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:39,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:39,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:39,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:39,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:39,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:39,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:39,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:39,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640259837] [2020-09-25 01:09:39,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:39,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 01:09:39,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588059197] [2020-09-25 01:09:39,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 01:09:39,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 01:09:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:09:39,498 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2020-09-25 01:09:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:39,686 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 01:09:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 01:09:39,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-25 01:09:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:39,688 INFO L225 Difference]: With dead ends: 66 [2020-09-25 01:09:39,688 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 01:09:39,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:09:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 01:09:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-25 01:09:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 01:09:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-25 01:09:39,697 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 27 [2020-09-25 01:09:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:39,697 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-25 01:09:39,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 01:09:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-25 01:09:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 01:09:39,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:39,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:39,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:39,699 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:39,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1577865979, now seen corresponding path program 3 times [2020-09-25 01:09:39,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:39,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31057706] [2020-09-25 01:09:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:39,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:39,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 01:09:39,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:39,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-09-25 01:09:39,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:39,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:39,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:09:39,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:40,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:40,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:40,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:40,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:40,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:40,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:40,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:40,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31057706] [2020-09-25 01:09:40,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:40,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:40,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548740312] [2020-09-25 01:09:40,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:40,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:40,166 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-09-25 01:09:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:40,415 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-09-25 01:09:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 01:09:40,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-25 01:09:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:40,416 INFO L225 Difference]: With dead ends: 80 [2020-09-25 01:09:40,417 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 01:09:40,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-25 01:09:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 01:09:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 01:09:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 01:09:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-25 01:09:40,425 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2020-09-25 01:09:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:40,425 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-25 01:09:40,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-25 01:09:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 01:09:40,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:40,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:40,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:40,428 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:40,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1087419973, now seen corresponding path program 4 times [2020-09-25 01:09:40,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:40,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354486700] [2020-09-25 01:09:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:40,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 01:09:40,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:40,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-09-25 01:09:40,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:40,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:40,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 01:09:40,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:41,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:41,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:41,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:41,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354486700] [2020-09-25 01:09:41,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:41,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 01:09:41,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481177402] [2020-09-25 01:09:41,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 01:09:41,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 01:09:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:41,073 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 13 states. [2020-09-25 01:09:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:41,393 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-25 01:09:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 01:09:41,393 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-25 01:09:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:41,395 INFO L225 Difference]: With dead ends: 62 [2020-09-25 01:09:41,395 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 01:09:41,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:09:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 01:09:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-25 01:09:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 01:09:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-09-25 01:09:41,402 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2020-09-25 01:09:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:41,403 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-09-25 01:09:41,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 01:09:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-09-25 01:09:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 01:09:41,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:41,405 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:41,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:41,405 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:41,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1795298373, now seen corresponding path program 5 times [2020-09-25 01:09:41,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:41,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052357939] [2020-09-25 01:09:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 01:09:41,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-09-25 01:09:41,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:09:41,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 01:09:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:42,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:42,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:42,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:42,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:42,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:42,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052357939] [2020-09-25 01:09:42,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:42,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:42,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263960783] [2020-09-25 01:09:42,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:42,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:42,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:42,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:42,041 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-09-25 01:09:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:42,287 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-25 01:09:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 01:09:42,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-25 01:09:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:42,289 INFO L225 Difference]: With dead ends: 79 [2020-09-25 01:09:42,290 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 01:09:42,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-25 01:09:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 01:09:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 01:09:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 01:09:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 01:09:42,291 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-09-25 01:09:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:42,292 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 01:09:42,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 01:09:42,292 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 01:09:42,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:42,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 01:09:42,407 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 01:09:42,407 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:09:42,407 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:09:42,407 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 01:09:42,408 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-25 01:09:42,408 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-09-25 01:09:42,409 INFO L264 CegarLoopResult]: At program point L19-4(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-25 01:09:42,409 INFO L264 CegarLoopResult]: At program point L19-5(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-09-25 01:09:42,409 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-09-25 01:09:42,409 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-09-25 01:09:42,409 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-25 01:09:42,409 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L26-2(line 26) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-25 01:09:42,410 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 01:09:42,411 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-25 01:09:42,411 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-25 01:09:42,411 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-25 01:09:42,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:42 BoogieIcfgContainer [2020-09-25 01:09:42,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:42,436 INFO L168 Benchmark]: Toolchain (without parser) took 5825.48 ms. Allocated memory was 109.6 MB in the beginning and 238.6 MB in the end (delta: 129.0 MB). Free memory was 75.2 MB in the beginning and 152.8 MB in the end (delta: -77.6 MB). Peak memory consumption was 51.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,437 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 109.6 MB. Free memory was 92.3 MB in the beginning and 92.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.75 ms. Allocated memory was 109.6 MB in the beginning and 123.2 MB in the end (delta: 13.6 MB). Free memory was 74.6 MB in the beginning and 100.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,440 INFO L168 Benchmark]: Boogie Preprocessor took 104.16 ms. Allocated memory was 123.2 MB in the beginning and 159.4 MB in the end (delta: 36.2 MB). Free memory was 100.5 MB in the beginning and 145.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,441 INFO L168 Benchmark]: RCFGBuilder took 301.17 ms. Allocated memory is still 159.4 MB. Free memory was 145.4 MB in the beginning and 133.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,442 INFO L168 Benchmark]: TraceAbstraction took 5057.56 ms. Allocated memory was 159.4 MB in the beginning and 238.6 MB in the end (delta: 79.2 MB). Free memory was 133.2 MB in the beginning and 152.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:42,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 109.6 MB. Free memory was 92.3 MB in the beginning and 92.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.75 ms. Allocated memory was 109.6 MB in the beginning and 123.2 MB in the end (delta: 13.6 MB). Free memory was 74.6 MB in the beginning and 100.5 MB in the end (delta: -25.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.16 ms. Allocated memory was 123.2 MB in the beginning and 159.4 MB in the end (delta: 36.2 MB). Free memory was 100.5 MB in the beginning and 145.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.17 ms. Allocated memory is still 159.4 MB. Free memory was 145.4 MB in the beginning and 133.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5057.56 ms. Allocated memory was 159.4 MB in the beginning and 238.6 MB in the end (delta: 79.2 MB). Free memory was 133.2 MB in the beginning and 152.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 154 SDtfs, 92 SDslu, 770 SDs, 0 SdLazy, 619 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 27 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 188 ConstructedInterpolants, 0 QuantifiedInterpolants, 34438 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/155 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...