/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=0.5 --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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:39:17,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:39:17,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:39:17,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:39:17,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:39:17,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:39:17,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:39:17,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:39:17,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:39:17,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:39:17,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:39:17,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:39:17,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:39:17,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:39:17,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:39:17,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:39:17,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:39:17,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:39:17,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:39:17,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:39:17,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:39:17,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:39:17,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:39:17,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:39:17,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:39:17,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:39:17,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:39:17,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:39:17,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:39:17,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:39:17,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:39:17,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:39:17,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:39:17,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:39:17,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:39:17,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:39:17,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:39:17,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:39:17,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:39:17,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:39:17,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:39:17,752 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 14:39:17,795 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:39:17,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:39:17,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:39:17,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:39:17,798 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:39:17,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:39:17,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:39:17,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:39:17,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:39:17,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:39:17,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:39:17,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:39:17,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:39:17,801 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:39:17,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:39:17,801 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:39:17,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:39:17,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:39:17,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:39:17,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:39:17,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:39:17,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:39:17,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:39:17,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:39:17,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:39:17,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:39:17,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:39:17,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:39:17,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:39:17,804 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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;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=0.5;log-additional-information=true; [2020-09-25 14:39:18,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:39:18,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:39:18,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:39:18,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:39:18,294 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:39:18,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2020-09-25 14:39:18,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0acd699c4/be37c8c6c312449fb3934342454c0748/FLAG7e910b77d [2020-09-25 14:39:18,968 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:39:18,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2020-09-25 14:39:18,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0acd699c4/be37c8c6c312449fb3934342454c0748/FLAG7e910b77d [2020-09-25 14:39:19,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0acd699c4/be37c8c6c312449fb3934342454c0748 [2020-09-25 14:39:19,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:39:19,207 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:39:19,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:39:19,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:39:19,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:39:19,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:39:19" (1/1) ... [2020-09-25 14:39:19,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e01188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:19, skipping insertion in model container [2020-09-25 14:39:19,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:39:19" (1/1) ... [2020-09-25 14:39:19,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:39:19,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:39:19,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:39:19,764 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:39:19,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:39:20,000 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:39:20,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20 WrapperNode [2020-09-25 14:39:20,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:39:20,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:39:20,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:39:20,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:39:20,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (1/1) ... [2020-09-25 14:39:20,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:39:20,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:39:20,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:39:20,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:39:20,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (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 14:39:20,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:39:20,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:39:20,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:39:20,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:39:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:39:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:39:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:39:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:39:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:39:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:39:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:39:21,540 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:39:21,540 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:39:21,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:39:21 BoogieIcfgContainer [2020-09-25 14:39:21,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:39:21,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:39:21,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:39:21,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:39:21,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:39:19" (1/3) ... [2020-09-25 14:39:21,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa3c231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:39:21, skipping insertion in model container [2020-09-25 14:39:21,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:20" (2/3) ... [2020-09-25 14:39:21,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa3c231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:39:21, skipping insertion in model container [2020-09-25 14:39:21,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:39:21" (3/3) ... [2020-09-25 14:39:21,561 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2020-09-25 14:39:21,573 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:39:21,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:39:21,610 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:39:21,646 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:39:21,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:39:21,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:39:21,647 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:39:21,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:39:21,647 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:39:21,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:39:21,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:39:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 14:39:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-25 14:39:21,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:21,703 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] [2020-09-25 14:39:21,703 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:21,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:21,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1564262750, now seen corresponding path program 1 times [2020-09-25 14:39:21,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:21,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226177907] [2020-09-25 14:39:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:22,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:23,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:24,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:24,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:26,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:27,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:27,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-09-25 14:39:27,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:27,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-09-25 14:39:27,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:27,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:39:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 14:39:27,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 14:39:27,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:39:27,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:27,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:27,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:27,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:27,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 14:39:27,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:27,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 14:39:27,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:27,315 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 14:39:27,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226177907] [2020-09-25 14:39:27,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:39:27,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:39:27,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522591967] [2020-09-25 14:39:27,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:39:27,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:39:27,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:39:27,349 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 14:39:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:29,444 INFO L93 Difference]: Finished difference Result 1205 states and 1651 transitions. [2020-09-25 14:39:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:39:29,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-09-25 14:39:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:29,477 INFO L225 Difference]: With dead ends: 1205 [2020-09-25 14:39:29,477 INFO L226 Difference]: Without dead ends: 627 [2020-09-25 14:39:29,488 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 14:39:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-09-25 14:39:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 613. [2020-09-25 14:39:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-09-25 14:39:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 759 transitions. [2020-09-25 14:39:29,599 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 759 transitions. Word has length 123 [2020-09-25 14:39:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:29,601 INFO L479 AbstractCegarLoop]: Abstraction has 613 states and 759 transitions. [2020-09-25 14:39:29,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:39:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 759 transitions. [2020-09-25 14:39:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-25 14:39:29,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:29,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:29,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:39:29,614 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash -750015737, now seen corresponding path program 1 times [2020-09-25 14:39:29,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:29,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027872055] [2020-09-25 14:39:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:29,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:33,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:33,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 14:39:33,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 14:39:33,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4303 [2020-09-25 14:39:33,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:33,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-09-25 14:39:33,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 14:39:33,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:39:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:34,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:34,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:34,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:34,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:34,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:39:34,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:34,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:34,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:34,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:34,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:34,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:34,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 14:39:34,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:34,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 14:39:34,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:34,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:34,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 14:39:34,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:34,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027872055] [2020-09-25 14:39:34,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:34,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:34,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138440397] [2020-09-25 14:39:34,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:34,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:34,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:34,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:34,212 INFO L87 Difference]: Start difference. First operand 613 states and 759 transitions. Second operand 5 states. [2020-09-25 14:39:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:36,632 INFO L93 Difference]: Finished difference Result 1592 states and 2044 transitions. [2020-09-25 14:39:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:36,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-09-25 14:39:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:36,644 INFO L225 Difference]: With dead ends: 1592 [2020-09-25 14:39:36,644 INFO L226 Difference]: Without dead ends: 1001 [2020-09-25 14:39:36,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2020-09-25 14:39:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 801. [2020-09-25 14:39:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2020-09-25 14:39:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 979 transitions. [2020-09-25 14:39:36,690 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 979 transitions. Word has length 157 [2020-09-25 14:39:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:36,691 INFO L479 AbstractCegarLoop]: Abstraction has 801 states and 979 transitions. [2020-09-25 14:39:36,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 979 transitions. [2020-09-25 14:39:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 14:39:36,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:36,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:36,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:39:36,700 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1182522790, now seen corresponding path program 1 times [2020-09-25 14:39:36,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:36,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352772763] [2020-09-25 14:39:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:36,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:36,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:36,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:40,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:41,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 14:39:41,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:41,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 14:39:41,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:41,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:41,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:41,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 14:39:41,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-25 14:39:41,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:41,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:41,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:41,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:39:41,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:41,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:41,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:41,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:41,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:39:41,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:41,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-25 14:39:41,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:41,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:41,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:42,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 14:39:42,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:39:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:42,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352772763] [2020-09-25 14:39:42,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:42,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:42,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128673709] [2020-09-25 14:39:42,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:42,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:42,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:42,078 INFO L87 Difference]: Start difference. First operand 801 states and 979 transitions. Second operand 5 states. [2020-09-25 14:39:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:44,380 INFO L93 Difference]: Finished difference Result 2090 states and 2650 transitions. [2020-09-25 14:39:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:44,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-09-25 14:39:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:44,390 INFO L225 Difference]: With dead ends: 2090 [2020-09-25 14:39:44,390 INFO L226 Difference]: Without dead ends: 1311 [2020-09-25 14:39:44,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-09-25 14:39:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1261. [2020-09-25 14:39:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2020-09-25 14:39:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1488 transitions. [2020-09-25 14:39:44,455 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1488 transitions. Word has length 161 [2020-09-25 14:39:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:44,457 INFO L479 AbstractCegarLoop]: Abstraction has 1261 states and 1488 transitions. [2020-09-25 14:39:44,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1488 transitions. [2020-09-25 14:39:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-09-25 14:39:44,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:44,468 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:44,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:39:44,471 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash -223186702, now seen corresponding path program 1 times [2020-09-25 14:39:44,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:44,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772030650] [2020-09-25 14:39:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:44,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:48,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:48,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-25 14:39:48,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:48,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4420 [2020-09-25 14:39:48,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:48,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-09-25 14:39:48,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-25 14:39:48,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:49,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:49,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:49,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:49,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:39:49,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:49,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:49,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:49,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:49,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:49,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:49,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:49,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:39:49,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:39:49,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:49,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:49,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 14:39:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:49,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:49,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:49,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 14:39:49,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 14:39:49,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:49,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 14:39:49,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 14:39:49,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772030650] [2020-09-25 14:39:49,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:49,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:49,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183985160] [2020-09-25 14:39:49,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:49,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:49,294 INFO L87 Difference]: Start difference. First operand 1261 states and 1488 transitions. Second operand 5 states. [2020-09-25 14:39:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:50,918 INFO L93 Difference]: Finished difference Result 3265 states and 3951 transitions. [2020-09-25 14:39:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:50,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2020-09-25 14:39:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:50,928 INFO L225 Difference]: With dead ends: 3265 [2020-09-25 14:39:50,928 INFO L226 Difference]: Without dead ends: 1328 [2020-09-25 14:39:50,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:50,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2020-09-25 14:39:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1318. [2020-09-25 14:39:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2020-09-25 14:39:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1508 transitions. [2020-09-25 14:39:50,980 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1508 transitions. Word has length 180 [2020-09-25 14:39:50,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:50,980 INFO L479 AbstractCegarLoop]: Abstraction has 1318 states and 1508 transitions. [2020-09-25 14:39:50,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1508 transitions. [2020-09-25 14:39:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-25 14:39:50,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:50,986 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-09-25 14:39:50,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:39:50,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:50,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1638865887, now seen corresponding path program 1 times [2020-09-25 14:39:50,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:50,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829442896] [2020-09-25 14:39:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:51,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:51,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:52,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:56,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:56,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-09-25 14:39:56,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:39:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 14:39:56,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:56,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-09-25 14:39:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 14:39:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:56,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:56,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:56,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:56,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:56,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:56,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:39:56,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:56,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:56,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:56,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:56,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:56,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:56,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:56,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:39:56,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:56,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:39:56,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:56,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:56,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:56,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:56,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:56,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 14:39:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:56,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:56,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:56,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 14:39:56,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:56,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 14:39:56,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:56,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:56,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:56,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:39:56,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 14:39:56,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829442896] [2020-09-25 14:39:56,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:56,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:56,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921082012] [2020-09-25 14:39:56,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:56,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:56,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:56,274 INFO L87 Difference]: Start difference. First operand 1318 states and 1508 transitions. Second operand 5 states. [2020-09-25 14:39:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:57,804 INFO L93 Difference]: Finished difference Result 3612 states and 4220 transitions. [2020-09-25 14:39:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:57,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-09-25 14:39:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:57,818 INFO L225 Difference]: With dead ends: 3612 [2020-09-25 14:39:57,819 INFO L226 Difference]: Without dead ends: 2314 [2020-09-25 14:39:57,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2020-09-25 14:39:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2088. [2020-09-25 14:39:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-09-25 14:39:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2415 transitions. [2020-09-25 14:39:57,903 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2415 transitions. Word has length 187 [2020-09-25 14:39:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:57,903 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 2415 transitions. [2020-09-25 14:39:57,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2415 transitions. [2020-09-25 14:39:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-09-25 14:39:57,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:57,914 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 14:39:57,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:39:57,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2113690359, now seen corresponding path program 1 times [2020-09-25 14:39:57,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:57,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623293399] [2020-09-25 14:39:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:57,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:58,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:02,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:02,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-09-25 14:40:02,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 14:40:02,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:40:02,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:02,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:40:02,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:40:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 14:40:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:40:03,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:40:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:03,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:03,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:03,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:40:03,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:03,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:40:03,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:03,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:40:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:40:03,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:40:03,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:40:03,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:40:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:03,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:03,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:40:03,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:03,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:40:03,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:03,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:40:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:40:03,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 14:40:03,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:03,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 14:40:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:03,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:03,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 14:40:03,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:03,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-25 14:40:03,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:03,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:40:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:40:03,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-25 14:40:03,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:40:03,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-09-25 14:40:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:03,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:40:03,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 14:40:03,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:40:03,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 14:40:03,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:40:03,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:40:03,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:40:03,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 14:40:03,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:40:03,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:40:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 144 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-25 14:40:03,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623293399] [2020-09-25 14:40:03,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:40:03,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:40:03,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193765945] [2020-09-25 14:40:03,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:40:03,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:40:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:40:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:40:03,687 INFO L87 Difference]: Start difference. First operand 2088 states and 2415 transitions. Second operand 7 states. [2020-09-25 14:40:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:40:05,302 INFO L93 Difference]: Finished difference Result 4000 states and 4664 transitions. [2020-09-25 14:40:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:40:05,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 272 [2020-09-25 14:40:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:40:05,311 INFO L225 Difference]: With dead ends: 4000 [2020-09-25 14:40:05,311 INFO L226 Difference]: Without dead ends: 1769 [2020-09-25 14:40:05,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:40:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2020-09-25 14:40:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1757. [2020-09-25 14:40:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1757 states. [2020-09-25 14:40:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 1963 transitions. [2020-09-25 14:40:05,364 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 1963 transitions. Word has length 272 [2020-09-25 14:40:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:40:05,365 INFO L479 AbstractCegarLoop]: Abstraction has 1757 states and 1963 transitions. [2020-09-25 14:40:05,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:40:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 1963 transitions. [2020-09-25 14:40:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-25 14:40:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:40:05,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:40:05,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 14:40:05,374 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:40:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:40:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1418764426, now seen corresponding path program 1 times [2020-09-25 14:40:05,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:40:05,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742194967] [2020-09-25 14:40:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:40:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:05,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking...