/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --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/Problem02_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:08:04,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:08:04,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:08:05,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:08:05,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:08:05,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:08:05,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:08:05,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:08:05,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:08:05,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:08:05,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:08:05,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:08:05,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:08:05,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:08:05,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:08:05,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:08:05,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:08:05,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:08:05,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:08:05,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:08:05,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:08:05,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:08:05,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:08:05,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:08:05,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:08:05,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:08:05,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:08:05,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:08:05,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:08:05,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:08:05,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:08:05,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:08:05,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:08:05,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:08:05,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:08:05,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:08:05,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:08:05,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:08:05,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:08:05,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:08:05,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:08:05,074 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 10:08:05,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:08:05,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:08:05,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:08:05,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:08:05,122 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:08:05,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:08:05,123 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:08:05,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:08:05,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:08:05,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:08:05,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:08:05,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:08:05,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:08:05,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:08:05,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:08:05,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:08:05,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:08:05,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:08:05,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:08:05,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:08:05,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:08:05,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:08:05,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:08:05,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:08:05,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:08:05,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:08:05,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:08:05,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:08:05,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:08:05,129 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:08:05,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:08:05,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:08:05,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:08:05,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:08:05,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:08:05,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2020-09-25 10:08:05,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6996cd5d/9e201fdf3e4f4f01b1e08c6f7a0038ff/FLAGc7810bfc7 [2020-09-25 10:08:06,370 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:08:06,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2020-09-25 10:08:06,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6996cd5d/9e201fdf3e4f4f01b1e08c6f7a0038ff/FLAGc7810bfc7 [2020-09-25 10:08:06,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6996cd5d/9e201fdf3e4f4f01b1e08c6f7a0038ff [2020-09-25 10:08:06,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:08:06,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:08:06,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:08:06,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:08:06,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:08:06,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:08:06" (1/1) ... [2020-09-25 10:08:06,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd4ce29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:06, skipping insertion in model container [2020-09-25 10:08:06,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:08:06" (1/1) ... [2020-09-25 10:08:06,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:08:06,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:08:07,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:08:07,446 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:08:07,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:08:07,653 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:08:07,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07 WrapperNode [2020-09-25 10:08:07,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:08:07,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:08:07,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:08:07,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:08:07,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... [2020-09-25 10:08:07,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:08:07,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:08:07,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:08:07,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:08:07,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:08:07,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:08:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:08:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:08:07,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:08:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:08:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:08:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:08:07,917 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:08:07,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:08:07,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:08:07,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:08:09,330 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:08:09,331 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:08:09,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:08:09 BoogieIcfgContainer [2020-09-25 10:08:09,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:08:09,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:08:09,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:08:09,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:08:09,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:08:06" (1/3) ... [2020-09-25 10:08:09,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13789e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:08:09, skipping insertion in model container [2020-09-25 10:08:09,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:08:07" (2/3) ... [2020-09-25 10:08:09,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13789e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:08:09, skipping insertion in model container [2020-09-25 10:08:09,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:08:09" (3/3) ... [2020-09-25 10:08:09,364 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label03.c [2020-09-25 10:08:09,379 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:08:09,394 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:08:09,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:08:09,462 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:08:09,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:08:09,464 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:08:09,464 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:08:09,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:08:09,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:08:09,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:08:09,464 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:08:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 10:08:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-25 10:08:09,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:09,547 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, 1, 1, 1, 1] [2020-09-25 10:08:09,547 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1547939106, now seen corresponding path program 1 times [2020-09-25 10:08:09,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:09,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389131884] [2020-09-25 10:08:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:10,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:11,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:12,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:12,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:14,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:14,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 10:08:14,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:08:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 10:08:14,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:14,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:14,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:08:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 10:08:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 10:08:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:08:15,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:15,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:15,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:15,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:15,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-25 10:08:15,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:15,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:15,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:15,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:15,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:08:15,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:08:15,337 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 10:08:15,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389131884] [2020-09-25 10:08:15,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:08:15,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:08:15,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583646945] [2020-09-25 10:08:15,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:08:15,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:08:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:08:15,370 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 10:08:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:17,756 INFO L93 Difference]: Finished difference Result 1396 states and 1850 transitions. [2020-09-25 10:08:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:08:17,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-09-25 10:08:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:17,791 INFO L225 Difference]: With dead ends: 1396 [2020-09-25 10:08:17,791 INFO L226 Difference]: Without dead ends: 788 [2020-09-25 10:08:17,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:08:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-09-25 10:08:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 665. [2020-09-25 10:08:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-09-25 10:08:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 813 transitions. [2020-09-25 10:08:17,919 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 813 transitions. Word has length 155 [2020-09-25 10:08:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:17,920 INFO L479 AbstractCegarLoop]: Abstraction has 665 states and 813 transitions. [2020-09-25 10:08:17,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:08:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 813 transitions. [2020-09-25 10:08:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 10:08:17,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:17,928 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, 1, 1, 1, 1, 1] [2020-09-25 10:08:17,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:08:17,929 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1141989810, now seen corresponding path program 1 times [2020-09-25 10:08:17,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:17,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778585823] [2020-09-25 10:08:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:18,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:18,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:19,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:20,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:22,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:22,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 10:08:22,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 10:08:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 10:08:22,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:22,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:08:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:08:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-09-25 10:08:22,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 10:08:23,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:23,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:23,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:23,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 10:08:23,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:08:23,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:23,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:08:23,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:23,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:23,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 10:08:23,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 10:08:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:23,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:08:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 10:08:23,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778585823] [2020-09-25 10:08:23,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:23,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 10:08:23,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998741568] [2020-09-25 10:08:23,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 10:08:23,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 10:08:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:08:23,389 INFO L87 Difference]: Start difference. First operand 665 states and 813 transitions. Second operand 6 states. [2020-09-25 10:08:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:25,036 INFO L93 Difference]: Finished difference Result 1647 states and 2128 transitions. [2020-09-25 10:08:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 10:08:25,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-09-25 10:08:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:25,046 INFO L225 Difference]: With dead ends: 1647 [2020-09-25 10:08:25,046 INFO L226 Difference]: Without dead ends: 1004 [2020-09-25 10:08:25,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:08:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2020-09-25 10:08:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 816. [2020-09-25 10:08:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-09-25 10:08:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1043 transitions. [2020-09-25 10:08:25,095 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1043 transitions. Word has length 173 [2020-09-25 10:08:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:25,096 INFO L479 AbstractCegarLoop]: Abstraction has 816 states and 1043 transitions. [2020-09-25 10:08:25,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 10:08:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1043 transitions. [2020-09-25 10:08:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 10:08:25,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:25,100 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:08:25,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:08:25,101 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 608489, now seen corresponding path program 1 times [2020-09-25 10:08:25,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:25,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551993858] [2020-09-25 10:08:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:25,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:25,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:28,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:30,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:30,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 10:08:30,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:08:30,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 10:08:30,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:30,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 10:08:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 10:08:30,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-09-25 10:08:30,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:30,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:30,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:30,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:30,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:30,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:30,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 10:08:30,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:30,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:08:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:08:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:30,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:30,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:30,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:30,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:30,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 10:08:30,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:30,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 10:08:30,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:30,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:08:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:30,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 10:08:30,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:30,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551993858] [2020-09-25 10:08:30,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:30,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:08:30,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835960187] [2020-09-25 10:08:30,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:08:30,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:08:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:08:30,856 INFO L87 Difference]: Start difference. First operand 816 states and 1043 transitions. Second operand 12 states. [2020-09-25 10:08:31,689 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-09-25 10:08:35,185 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-09-25 10:08:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:36,441 INFO L93 Difference]: Finished difference Result 3325 states and 4776 transitions. [2020-09-25 10:08:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 10:08:36,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 181 [2020-09-25 10:08:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:36,454 INFO L225 Difference]: With dead ends: 3325 [2020-09-25 10:08:36,454 INFO L226 Difference]: Without dead ends: 2084 [2020-09-25 10:08:36,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-09-25 10:08:36,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2020-09-25 10:08:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2062. [2020-09-25 10:08:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2020-09-25 10:08:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2699 transitions. [2020-09-25 10:08:36,536 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2699 transitions. Word has length 181 [2020-09-25 10:08:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:36,536 INFO L479 AbstractCegarLoop]: Abstraction has 2062 states and 2699 transitions. [2020-09-25 10:08:36,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:08:36,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2699 transitions. [2020-09-25 10:08:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-25 10:08:36,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:36,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 10:08:36,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:08:36,548 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash 218590592, now seen corresponding path program 1 times [2020-09-25 10:08:36,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:36,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847333505] [2020-09-25 10:08:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:36,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:39,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:40,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:41,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-25 10:08:41,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:08:41,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 10:08:41,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:41,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 10:08:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 10:08:41,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-09-25 10:08:41,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:41,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:41,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:41,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:41,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:08:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:08:41,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:41,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:41,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:41,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:41,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 10:08:41,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:08:41,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 10:08:41,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:41,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:08:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:08:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 10:08:41,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:08:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847333505] [2020-09-25 10:08:42,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:42,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:08:42,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250148639] [2020-09-25 10:08:42,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:08:42,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:08:42,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:08:42,237 INFO L87 Difference]: Start difference. First operand 2062 states and 2699 transitions. Second operand 12 states. [2020-09-25 10:08:44,484 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-09-25 10:08:45,465 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-09-25 10:08:47,735 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-09-25 10:08:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:48,078 INFO L93 Difference]: Finished difference Result 4844 states and 6447 transitions. [2020-09-25 10:08:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 10:08:48,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 201 [2020-09-25 10:08:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:48,091 INFO L225 Difference]: With dead ends: 4844 [2020-09-25 10:08:48,091 INFO L226 Difference]: Without dead ends: 2207 [2020-09-25 10:08:48,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2020-09-25 10:08:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-09-25 10:08:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1873. [2020-09-25 10:08:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1873 states. [2020-09-25 10:08:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2349 transitions. [2020-09-25 10:08:48,164 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2349 transitions. Word has length 201 [2020-09-25 10:08:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:48,164 INFO L479 AbstractCegarLoop]: Abstraction has 1873 states and 2349 transitions. [2020-09-25 10:08:48,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:08:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2349 transitions. [2020-09-25 10:08:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-09-25 10:08:48,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:48,175 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, 2, 2, 2, 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] [2020-09-25 10:08:48,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:08:48,176 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2062844933, now seen corresponding path program 1 times [2020-09-25 10:08:48,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:48,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384784401] [2020-09-25 10:08:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:48,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:48,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:48,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:49,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-09-25 10:08:53,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:08:53,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 10:08:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:08:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-09-25 10:08:53,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-09-25 10:08:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:53,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:08:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:08:53,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:08:53,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:53,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:08:53,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:08:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 10:08:53,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:08:53,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:08:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:08:53,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:08:53,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-25 10:08:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:53,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:53,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:08:53,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:08:53,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 10:08:53,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:08:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 10:08:53,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384784401] [2020-09-25 10:08:53,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:08:53,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 10:08:53,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507775023] [2020-09-25 10:08:53,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 10:08:53,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:08:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 10:08:53,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:08:53,702 INFO L87 Difference]: Start difference. First operand 1873 states and 2349 transitions. Second operand 7 states. [2020-09-25 10:08:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:08:56,373 INFO L93 Difference]: Finished difference Result 3998 states and 4976 transitions. [2020-09-25 10:08:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 10:08:56,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 224 [2020-09-25 10:08:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:08:56,386 INFO L225 Difference]: With dead ends: 3998 [2020-09-25 10:08:56,386 INFO L226 Difference]: Without dead ends: 1885 [2020-09-25 10:08:56,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:08:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2020-09-25 10:08:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1863. [2020-09-25 10:08:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1863 states. [2020-09-25 10:08:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2326 transitions. [2020-09-25 10:08:56,447 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2326 transitions. Word has length 224 [2020-09-25 10:08:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:08:56,448 INFO L479 AbstractCegarLoop]: Abstraction has 1863 states and 2326 transitions. [2020-09-25 10:08:56,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 10:08:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2326 transitions. [2020-09-25 10:08:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-25 10:08:56,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:08:56,458 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 10:08:56,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:08:56,459 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:08:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:08:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1973306448, now seen corresponding path program 1 times [2020-09-25 10:08:56,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:08:56,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147856587] [2020-09-25 10:08:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:08:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:08:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:08:56,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking...