/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:15,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:15,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:15,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:15,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:15,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:15,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:15,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:15,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:15,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:15,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:15,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:15,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:15,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:15,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:15,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:15,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:15,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:15,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:15,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:15,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:15,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:15,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:15,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:15,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:15,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:15,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:15,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:15,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:15,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:15,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:15,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:15,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:15,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:15,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:15,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:15,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:15,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:15,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:15,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:15,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:15,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:39:15,112 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:15,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:15,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:15,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:15,114 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:15,115 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:15,115 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:15,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:15,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:15,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:15,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:15,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:15,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:15,116 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:15,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:15,117 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:15,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:15,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:15,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:15,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:15,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:15,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:15,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:15,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:15,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:15,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:15,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:15,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:15,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:15,120 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:39:15,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:15,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:15,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:15,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:15,608 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:15,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label13.c [2020-09-24 21:39:15,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a8ef5eb9/cdf6fb62af044203a7c56689793fac80/FLAG25f5cfc57 [2020-09-24 21:39:16,370 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:16,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label13.c [2020-09-24 21:39:16,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a8ef5eb9/cdf6fb62af044203a7c56689793fac80/FLAG25f5cfc57 [2020-09-24 21:39:16,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a8ef5eb9/cdf6fb62af044203a7c56689793fac80 [2020-09-24 21:39:16,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:16,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:16,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:16,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:16,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:16,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:16" (1/1) ... [2020-09-24 21:39:16,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5211d524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:16, skipping insertion in model container [2020-09-24 21:39:16,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:16" (1/1) ... [2020-09-24 21:39:16,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:16,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:17,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:17,500 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:17,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:17,610 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:17,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17 WrapperNode [2020-09-24 21:39:17,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:17,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:17,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:17,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:17,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... [2020-09-24 21:39:17,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:17,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:17,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:17,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:17,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:17,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:17,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:19,142 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:19,142 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:19,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:19 BoogieIcfgContainer [2020-09-24 21:39:19,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:19,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:19,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:19,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:19,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:16" (1/3) ... [2020-09-24 21:39:19,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448afc1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:19, skipping insertion in model container [2020-09-24 21:39:19,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:17" (2/3) ... [2020-09-24 21:39:19,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448afc1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:19, skipping insertion in model container [2020-09-24 21:39:19,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:19" (3/3) ... [2020-09-24 21:39:19,162 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label13.c [2020-09-24 21:39:19,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:19,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:19,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:19,243 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:19,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:19,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:19,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:19,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:19,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:19,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:19,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 21:39:19,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:19,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:19,310 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash -946278635, now seen corresponding path program 1 times [2020-09-24 21:39:19,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:19,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786212473] [2020-09-24 21:39:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:24,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:24,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-09-24 21:39:24,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:39:24,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 21:39:24,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-09-24 21:39:24,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:39:25,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:25,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:25,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:25,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 21:39:25,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:39:25,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:25,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:26,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786212473] [2020-09-24 21:39:26,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:26,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:26,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81246256] [2020-09-24 21:39:26,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:26,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:26,313 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:27,060 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:27,259 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:27,687 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:28,483 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:39:29,432 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-24 21:39:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:32,037 INFO L93 Difference]: Finished difference Result 1528 states and 2153 transitions. [2020-09-24 21:39:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:39:32,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 151 [2020-09-24 21:39:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:32,088 INFO L225 Difference]: With dead ends: 1528 [2020-09-24 21:39:32,088 INFO L226 Difference]: Without dead ends: 909 [2020-09-24 21:39:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:39:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-09-24 21:39:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 825. [2020-09-24 21:39:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-09-24 21:39:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 980 transitions. [2020-09-24 21:39:32,239 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 980 transitions. Word has length 151 [2020-09-24 21:39:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:32,240 INFO L479 AbstractCegarLoop]: Abstraction has 825 states and 980 transitions. [2020-09-24 21:39:32,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 980 transitions. [2020-09-24 21:39:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-24 21:39:32,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:32,254 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:32,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:32,255 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1678379944, now seen corresponding path program 1 times [2020-09-24 21:39:32,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:32,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48622930] [2020-09-24 21:39:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:32,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:32,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:33,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:37,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:37,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 21:39:37,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:37,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-24 21:39:37,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:39:37,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:37,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:39:37,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 21:39:37,931 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-09-24 21:39:38,123 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-09-24 21:39:38,322 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-09-24 21:39:38,540 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2020-09-24 21:39:38,721 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2020-09-24 21:39:38,875 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-09-24 21:39:39,061 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2020-09-24 21:39:39,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:39,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:39,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:39,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-24 21:39:39,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:39,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:39,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:39,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:39,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:39,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:39:39,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:39,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:39:39,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:39:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:39,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:39:39,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:39,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48622930] [2020-09-24 21:39:39,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:39:39,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886910669] [2020-09-24 21:39:39,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:39:39,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:39:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:39:39,732 INFO L87 Difference]: Start difference. First operand 825 states and 980 transitions. Second operand 21 states. [2020-09-24 21:39:40,358 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-09-24 21:39:40,626 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2020-09-24 21:39:41,041 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 116 [2020-09-24 21:39:41,923 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 112 [2020-09-24 21:39:43,812 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2020-09-24 21:39:44,642 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2020-09-24 21:39:45,335 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 103 [2020-09-24 21:39:45,702 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 98 [2020-09-24 21:39:46,330 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2020-09-24 21:39:47,068 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-09-24 21:39:47,643 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-09-24 21:39:47,906 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-09-24 21:39:48,205 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-09-24 21:39:48,723 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-09-24 21:39:49,254 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-24 21:39:49,674 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2020-09-24 21:39:49,959 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 21:39:50,234 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-09-24 21:39:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:51,575 INFO L93 Difference]: Finished difference Result 2255 states and 2769 transitions. [2020-09-24 21:39:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:39:51,576 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-09-24 21:39:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:51,594 INFO L225 Difference]: With dead ends: 2255 [2020-09-24 21:39:51,594 INFO L226 Difference]: Without dead ends: 1518 [2020-09-24 21:39:51,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=717, Invalid=1833, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:39:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2020-09-24 21:39:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1230. [2020-09-24 21:39:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1230 states. [2020-09-24 21:39:51,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1431 transitions. [2020-09-24 21:39:51,699 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1431 transitions. Word has length 168 [2020-09-24 21:39:51,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:51,700 INFO L479 AbstractCegarLoop]: Abstraction has 1230 states and 1431 transitions. [2020-09-24 21:39:51,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:39:51,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1431 transitions. [2020-09-24 21:39:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-24 21:39:51,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:51,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:51,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:39:51,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1471921254, now seen corresponding path program 1 times [2020-09-24 21:39:51,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:51,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765077189] [2020-09-24 21:39:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:52,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:54,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:56,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:56,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-09-24 21:39:56,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:39:56,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 21:39:56,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:39:56,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:56,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:39:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:57,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:57,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:57,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:57,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:57,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:57,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-24 21:39:57,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:57,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:39:57,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:57,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:57,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:57,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:39:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:57,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:57,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:57,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:39:57,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:39:57,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 21:39:57,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:57,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:39:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:39:57,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:39:57,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:39:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:57,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765077189] [2020-09-24 21:39:57,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:39:57,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:39:57,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443642444] [2020-09-24 21:39:57,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:39:57,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:57,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:39:57,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:39:57,889 INFO L87 Difference]: Start difference. First operand 1230 states and 1431 transitions. Second operand 13 states. [2020-09-24 21:39:58,919 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-09-24 21:39:59,226 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-09-24 21:39:59,850 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-09-24 21:40:00,047 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-09-24 21:40:00,231 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:40:01,734 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-09-24 21:40:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:05,502 INFO L93 Difference]: Finished difference Result 2988 states and 3522 transitions. [2020-09-24 21:40:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:40:05,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 172 [2020-09-24 21:40:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:05,521 INFO L225 Difference]: With dead ends: 2988 [2020-09-24 21:40:05,521 INFO L226 Difference]: Without dead ends: 1586 [2020-09-24 21:40:05,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=307, Invalid=749, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:40:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2020-09-24 21:40:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1378. [2020-09-24 21:40:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2020-09-24 21:40:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 1584 transitions. [2020-09-24 21:40:05,586 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 1584 transitions. Word has length 172 [2020-09-24 21:40:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:05,587 INFO L479 AbstractCegarLoop]: Abstraction has 1378 states and 1584 transitions. [2020-09-24 21:40:05,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:40:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 1584 transitions. [2020-09-24 21:40:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-24 21:40:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:05,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:05,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:05,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:05,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1627853215, now seen corresponding path program 1 times [2020-09-24 21:40:05,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:05,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858412258] [2020-09-24 21:40:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:05,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking...