/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:33:44,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:33:44,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:33:44,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:33:44,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:33:44,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:33:44,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:33:44,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:33:44,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:33:44,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:33:44,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:33:44,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:33:44,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:33:44,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:33:44,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:33:44,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:33:44,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:33:44,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:33:44,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:33:44,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:33:44,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:33:44,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:33:44,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:33:44,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:33:44,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:33:44,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:33:44,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:33:44,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:33:44,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:33:44,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:33:44,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:33:44,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:33:44,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:33:44,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:33:44,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:33:44,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:33:44,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:33:44,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:33:44,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:33:44,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:33:44,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:33:44,968 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 [2020-10-12 13:33:44,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:33:44,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:33:44,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:33:44,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:33:44,993 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:33:44,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:33:44,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:33:44,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:33:44,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:33:44,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:33:44,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:33:44,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:33:44,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:33:44,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:33:44,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:33:44,995 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:33:44,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:33:44,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:33:44,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:33:44,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:33:44,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:33:44,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:33:44,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:33:44,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:33:44,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:33:44,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:33:44,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:33:44,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:33:44,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:33:44,998 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 13:33:45,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:33:45,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:33:45,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:33:45,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:33:45,363 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:33:45,363 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label04.c [2020-10-12 13:33:45,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b781bbff/f89bdfb29f1246c1924b4f1544f1de9b/FLAGd05afffc8 [2020-10-12 13:33:46,304 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:33:46,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label04.c [2020-10-12 13:33:46,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b781bbff/f89bdfb29f1246c1924b4f1544f1de9b/FLAGd05afffc8 [2020-10-12 13:33:46,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b781bbff/f89bdfb29f1246c1924b4f1544f1de9b [2020-10-12 13:33:46,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:33:46,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:33:46,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:33:46,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:33:46,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:33:46,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:33:46" (1/1) ... [2020-10-12 13:33:46,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:46, skipping insertion in model container [2020-10-12 13:33:46,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:33:46" (1/1) ... [2020-10-12 13:33:46,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:33:47,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:33:48,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:33:48,739 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:33:49,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:33:49,529 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:33:49,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49 WrapperNode [2020-10-12 13:33:49,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:33:49,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:33:49,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:33:49,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:33:49,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (1/1) ... [2020-10-12 13:33:49,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:33:49,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:33:49,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:33:49,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:33:49,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (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 [2020-10-12 13:33:50,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:33:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:33:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:33:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:33:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:33:50,030 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:33:50,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:33:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:33:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:33:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:33:50,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:33:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:33:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:33:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:33:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:33:50,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:33:50,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:34:01,623 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:34:01,624 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:34:01,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:34:01 BoogieIcfgContainer [2020-10-12 13:34:01,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:34:01,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:34:01,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:34:01,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:34:01,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:33:46" (1/3) ... [2020-10-12 13:34:01,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770ae743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:34:01, skipping insertion in model container [2020-10-12 13:34:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:33:49" (2/3) ... [2020-10-12 13:34:01,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770ae743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:34:01, skipping insertion in model container [2020-10-12 13:34:01,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:34:01" (3/3) ... [2020-10-12 13:34:01,658 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label04.c [2020-10-12 13:34:01,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:34:01,688 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:34:01,703 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:34:01,739 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:34:01,739 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:34:01,739 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:34:01,740 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:34:01,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:34:01,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:34:01,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:34:01,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:34:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:34:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 13:34:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:34:01,795 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] [2020-10-12 13:34:01,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:34:01,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:34:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1356842343, now seen corresponding path program 1 times [2020-10-12 13:34:01,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:34:01,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690759899] [2020-10-12 13:34:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:34:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:02,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:02,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:02,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 13:34:02,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:34:02,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-12 13:34:02,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:02,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:34:02,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:34:02,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 13:34:02,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 13:34:02,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:34:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:02,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:02,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:02,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:34:02,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:34:02,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 13:34:02,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:02,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:34:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:34:02,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:34:02,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:34:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:34:02,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690759899] [2020-10-12 13:34:02,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:34:02,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:34:02,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214952445] [2020-10-12 13:34:02,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:34:02,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:34:02,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:34:02,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:34:02,594 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:34:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:34:15,986 INFO L93 Difference]: Finished difference Result 3165 states and 5795 transitions. [2020-10-12 13:34:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:34:15,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-12 13:34:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:34:16,025 INFO L225 Difference]: With dead ends: 3165 [2020-10-12 13:34:16,025 INFO L226 Difference]: Without dead ends: 1961 [2020-10-12 13:34:16,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:34:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2020-10-12 13:34:16,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1943. [2020-10-12 13:34:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1943 states. [2020-10-12 13:34:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3346 transitions. [2020-10-12 13:34:16,274 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3346 transitions. Word has length 22 [2020-10-12 13:34:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:34:16,275 INFO L479 AbstractCegarLoop]: Abstraction has 1943 states and 3346 transitions. [2020-10-12 13:34:16,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:34:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3346 transitions. [2020-10-12 13:34:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 13:34:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:34:16,285 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 13:34:16,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:34:16,286 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:34:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:34:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -242610609, now seen corresponding path program 1 times [2020-10-12 13:34:16,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:34:16,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523856435] [2020-10-12 13:34:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:34:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:16,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:16,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:17,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:17,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:34:17,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:34:17,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-10-12 13:34:17,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:17,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:34:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:34:17,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 13:34:17,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:34:17,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:34:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:17,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:17,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:17,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:34:17,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:34:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:34:17,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:34:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:34:17,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:34:17,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:34:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:34:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:17,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:18,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:18,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 13:34:18,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:34:18,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-12 13:34:18,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:34:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:34:18,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 13:34:18,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:34:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:34:18,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523856435] [2020-10-12 13:34:18,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:34:18,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 13:34:18,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863499002] [2020-10-12 13:34:18,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:34:18,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:34:18,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:34:18,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:34:18,278 INFO L87 Difference]: Start difference. First operand 1943 states and 3346 transitions. Second operand 8 states. [2020-10-12 13:34:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:34:40,805 INFO L93 Difference]: Finished difference Result 6452 states and 11418 transitions. [2020-10-12 13:34:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 13:34:40,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-12 13:34:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:34:40,839 INFO L225 Difference]: With dead ends: 6452 [2020-10-12 13:34:40,839 INFO L226 Difference]: Without dead ends: 4515 [2020-10-12 13:34:40,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-12 13:34:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4515 states. [2020-10-12 13:34:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4515 to 4476. [2020-10-12 13:34:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4476 states. [2020-10-12 13:34:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 6769 transitions. [2020-10-12 13:34:41,012 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 6769 transitions. Word has length 91 [2020-10-12 13:34:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:34:41,013 INFO L479 AbstractCegarLoop]: Abstraction has 4476 states and 6769 transitions. [2020-10-12 13:34:41,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:34:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 6769 transitions. [2020-10-12 13:34:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 13:34:41,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:34:41,023 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 13:34:41,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:34:41,023 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:34:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:34:41,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1732700587, now seen corresponding path program 1 times [2020-10-12 13:34:41,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:34:41,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375531590] [2020-10-12 13:34:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:34:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:41,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:41,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:42,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:42,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 13:34:42,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:34:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 976 [2020-10-12 13:34:42,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:34:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:34:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 13:34:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:34:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:34:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:42,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:42,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:34:42,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:34:42,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:34:42,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:34:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:34:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:34:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:34:42,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:34:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:34:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:42,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:34:42,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:34:42,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 13:34:42,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:34:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-12 13:34:42,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:34:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:34:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:34:42,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 13:34:42,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:34:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:34:42,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375531590] [2020-10-12 13:34:42,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:34:42,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:34:42,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350318439] [2020-10-12 13:34:42,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:34:42,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:34:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:34:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:34:42,572 INFO L87 Difference]: Start difference. First operand 4476 states and 6769 transitions. Second operand 7 states. [2020-10-12 13:35:06,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:35:06,503 INFO L93 Difference]: Finished difference Result 17586 states and 27693 transitions. [2020-10-12 13:35:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:35:06,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-12 13:35:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:35:06,578 INFO L225 Difference]: With dead ends: 17586 [2020-10-12 13:35:06,579 INFO L226 Difference]: Without dead ends: 13116 [2020-10-12 13:35:06,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:35:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13116 states. [2020-10-12 13:35:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13116 to 13055. [2020-10-12 13:35:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13055 states. [2020-10-12 13:35:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13055 states to 13055 states and 18583 transitions. [2020-10-12 13:35:07,049 INFO L78 Accepts]: Start accepts. Automaton has 13055 states and 18583 transitions. Word has length 93 [2020-10-12 13:35:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:35:07,050 INFO L479 AbstractCegarLoop]: Abstraction has 13055 states and 18583 transitions. [2020-10-12 13:35:07,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:35:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 13055 states and 18583 transitions. [2020-10-12 13:35:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 13:35:07,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:35:07,055 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 13:35:07,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:35:07,057 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:35:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:35:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 589634435, now seen corresponding path program 1 times [2020-10-12 13:35:07,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:35:07,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026036646] [2020-10-12 13:35:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:35:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:07,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:07,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:08,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:08,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 13:35:08,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:35:08,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-12 13:35:08,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:35:08,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:35:08,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 13:35:08,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:35:08,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:35:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:08,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:35:08,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:35:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:35:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:35:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:35:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:35:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:35:08,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:35:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:08,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:08,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:35:08,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:35:08,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-12 13:35:08,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:08,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:35:08,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:35:08,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:35:08,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:35:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:35:08,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026036646] [2020-10-12 13:35:08,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:35:08,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:35:08,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868162966] [2020-10-12 13:35:08,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:35:08,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:35:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:35:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:35:08,484 INFO L87 Difference]: Start difference. First operand 13055 states and 18583 transitions. Second operand 7 states. [2020-10-12 13:35:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:35:40,851 INFO L93 Difference]: Finished difference Result 39295 states and 58371 transitions. [2020-10-12 13:35:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 13:35:40,853 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-12 13:35:40,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:35:40,993 INFO L225 Difference]: With dead ends: 39295 [2020-10-12 13:35:40,993 INFO L226 Difference]: Without dead ends: 26246 [2020-10-12 13:35:41,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:35:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2020-10-12 13:35:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 25215. [2020-10-12 13:35:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25215 states. [2020-10-12 13:35:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25215 states to 25215 states and 34392 transitions. [2020-10-12 13:35:42,701 INFO L78 Accepts]: Start accepts. Automaton has 25215 states and 34392 transitions. Word has length 97 [2020-10-12 13:35:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:35:42,701 INFO L479 AbstractCegarLoop]: Abstraction has 25215 states and 34392 transitions. [2020-10-12 13:35:42,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:35:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25215 states and 34392 transitions. [2020-10-12 13:35:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 13:35:42,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:35:42,704 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 13:35:42,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:35:42,705 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:35:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:35:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1083129267, now seen corresponding path program 1 times [2020-10-12 13:35:42,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:35:42,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478141016] [2020-10-12 13:35:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:35:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:42,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:42,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:44,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:44,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 13:35:44,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:35:44,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-12 13:35:44,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:35:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:35:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 13:35:44,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:35:44,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:35:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:44,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:44,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:35:44,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:35:44,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:35:44,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:35:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:35:44,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:35:44,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:35:44,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:35:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:35:44,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:35:44,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:35:44,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 13:35:44,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:35:44,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-12 13:35:44,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:35:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:35:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:35:44,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 13:35:44,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:35:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:35:45,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478141016] [2020-10-12 13:35:45,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:35:45,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:35:45,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092759663] [2020-10-12 13:35:45,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:35:45,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:35:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:35:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:35:45,014 INFO L87 Difference]: Start difference. First operand 25215 states and 34392 transitions. Second operand 7 states. [2020-10-12 13:36:08,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:36:08,221 INFO L93 Difference]: Finished difference Result 52353 states and 72653 transitions. [2020-10-12 13:36:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 13:36:08,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-12 13:36:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:36:08,345 INFO L225 Difference]: With dead ends: 52353 [2020-10-12 13:36:08,345 INFO L226 Difference]: Without dead ends: 27144 [2020-10-12 13:36:08,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:36:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2020-10-12 13:36:09,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 26157. [2020-10-12 13:36:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26157 states. [2020-10-12 13:36:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26157 states to 26157 states and 35522 transitions. [2020-10-12 13:36:09,361 INFO L78 Accepts]: Start accepts. Automaton has 26157 states and 35522 transitions. Word has length 137 [2020-10-12 13:36:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:36:09,363 INFO L479 AbstractCegarLoop]: Abstraction has 26157 states and 35522 transitions. [2020-10-12 13:36:09,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:36:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26157 states and 35522 transitions. [2020-10-12 13:36:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-12 13:36:09,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:36:09,366 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 13:36:09,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:36:09,366 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:36:09,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:36:09,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1201725648, now seen corresponding path program 1 times [2020-10-12 13:36:09,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:36:09,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908037045] [2020-10-12 13:36:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:36:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:36:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:10,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:36:10,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 13:36:10,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:36:10,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-12 13:36:10,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:36:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:36:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:36:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-12 13:36:10,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:36:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:36:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:36:10,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:10,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:36:10,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:36:10,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:36:10,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:36:10,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:36:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:36:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:36:10,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:36:10,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:36:10,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:36:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:36:10,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:10,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:36:10,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 13:36:10,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:36:10,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-12 13:36:10,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:36:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:36:10,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:36:10,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 13:36:10,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:36:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 13:36:10,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908037045] [2020-10-12 13:36:10,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:36:10,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 13:36:10,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184897619] [2020-10-12 13:36:10,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:36:10,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:36:10,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:36:10,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:36:10,778 INFO L87 Difference]: Start difference. First operand 26157 states and 35522 transitions. Second operand 7 states. [2020-10-12 13:36:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:36:54,225 INFO L93 Difference]: Finished difference Result 90313 states and 134840 transitions. [2020-10-12 13:36:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:36:54,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 151 [2020-10-12 13:36:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:36:54,493 INFO L225 Difference]: With dead ends: 90313 [2020-10-12 13:36:54,493 INFO L226 Difference]: Without dead ends: 64965 [2020-10-12 13:36:54,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-12 13:36:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64965 states. [2020-10-12 13:36:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64965 to 63140. [2020-10-12 13:36:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63140 states. [2020-10-12 13:36:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63140 states to 63140 states and 88432 transitions. [2020-10-12 13:36:56,200 INFO L78 Accepts]: Start accepts. Automaton has 63140 states and 88432 transitions. Word has length 151 [2020-10-12 13:36:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:36:56,201 INFO L479 AbstractCegarLoop]: Abstraction has 63140 states and 88432 transitions. [2020-10-12 13:36:56,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:36:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 63140 states and 88432 transitions. [2020-10-12 13:36:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-12 13:36:56,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:36:56,209 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:36:56,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:36:56,210 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:36:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:36:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 720474289, now seen corresponding path program 1 times [2020-10-12 13:36:56,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:36:56,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061000020] [2020-10-12 13:36:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:36:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:36:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:36:56,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:00,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:00,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-12 13:37:00,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:37:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4723 [2020-10-12 13:37:00,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:37:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 266 [2020-10-12 13:37:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 13:37:00,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:01,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:37:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:01,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:01,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:37:01,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:01,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:37:01,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:01,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:37:01,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:01,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:37:01,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:37:01,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:37:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:01,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:01,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:01,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:37:01,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:01,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 13:37:01,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:01,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:37:01,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:01,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:37:01,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:37:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:01,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:01,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:01,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 13:37:01,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:01,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-12 13:37:01,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:01,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:37:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:01,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:37:01,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:01,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-10-12 13:37:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:01,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:01,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:01,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:37:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:01,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 13:37:01,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:37:01,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 13:37:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2020-10-12 13:37:01,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061000020] [2020-10-12 13:37:01,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:37:01,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:37:01,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851095512] [2020-10-12 13:37:01,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:37:01,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:37:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:37:01,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:37:01,489 INFO L87 Difference]: Start difference. First operand 63140 states and 88432 transitions. Second operand 5 states. [2020-10-12 13:37:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:37:33,043 INFO L93 Difference]: Finished difference Result 127211 states and 184149 transitions. [2020-10-12 13:37:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:37:33,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2020-10-12 13:37:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:37:33,386 INFO L225 Difference]: With dead ends: 127211 [2020-10-12 13:37:33,386 INFO L226 Difference]: Without dead ends: 73064 [2020-10-12 13:37:33,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 13:37:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73064 states. [2020-10-12 13:37:34,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73064 to 72998. [2020-10-12 13:37:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72998 states. [2020-10-12 13:37:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72998 states to 72998 states and 104962 transitions. [2020-10-12 13:37:35,020 INFO L78 Accepts]: Start accepts. Automaton has 72998 states and 104962 transitions. Word has length 274 [2020-10-12 13:37:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:37:35,021 INFO L479 AbstractCegarLoop]: Abstraction has 72998 states and 104962 transitions. [2020-10-12 13:37:35,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 13:37:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 72998 states and 104962 transitions. [2020-10-12 13:37:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 13:37:35,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:37:35,032 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:37:35,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:37:35,034 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:37:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:37:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1133074596, now seen corresponding path program 1 times [2020-10-12 13:37:35,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:37:35,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358867053] [2020-10-12 13:37:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:37:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:35,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:35,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:36,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:37,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:37,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-12 13:37:37,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 13:37:37,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2797 [2020-10-12 13:37:37,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:37,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:37:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-12 13:37:37,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 13:37:37,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:37:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:38,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:38,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:38,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:37:38,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:38,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 13:37:38,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:38,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:37:38,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:38,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:37:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:37:38,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:37:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:38,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:38,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:37:38,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-12 13:37:38,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:37:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:38,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:37:38,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:38,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:37:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:38,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:38,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:38,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 13:37:38,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:37:38,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 13:37:38,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:38,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:37:38,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:37:38,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 13:37:38,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:37:38,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-10-12 13:37:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:37:38,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:37:38,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:37:38,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 13:37:38,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:37:38,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-12 13:37:38,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:37:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:37:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:37:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 13:37:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:37:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-12 13:37:38,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358867053] [2020-10-12 13:37:38,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:37:38,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:37:38,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070509944] [2020-10-12 13:37:38,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:37:38,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:37:38,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:37:38,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:37:38,850 INFO L87 Difference]: Start difference. First operand 72998 states and 104962 transitions. Second operand 7 states.