/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_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 13:45:46,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 13:45:46,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 13:45:46,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 13:45:46,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 13:45:46,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 13:45:46,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 13:45:46,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 13:45:46,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 13:45:46,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 13:45:46,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 13:45:46,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 13:45:46,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 13:45:46,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 13:45:46,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 13:45:46,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 13:45:46,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 13:45:46,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 13:45:46,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 13:45:46,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 13:45:46,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 13:45:46,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 13:45:46,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 13:45:46,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 13:45:46,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 13:45:46,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 13:45:46,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 13:45:46,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 13:45:46,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 13:45:46,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 13:45:46,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 13:45:46,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 13:45:46,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 13:45:46,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 13:45:46,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 13:45:46,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 13:45:46,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 13:45:46,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 13:45:46,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 13:45:46,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 13:45:46,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 13:45:46,893 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 13:45:46,954 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 13:45:46,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 13:45:46,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 13:45:46,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 13:45:46,957 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 13:45:46,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 13:45:46,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 13:45:46,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 13:45:46,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 13:45:46,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 13:45:46,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 13:45:46,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 13:45:46,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 13:45:46,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 13:45:46,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 13:45:46,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 13:45:46,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 13:45:46,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 13:45:46,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 13:45:46,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 13:45:46,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 13:45:46,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 13:45:46,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 13:45:46,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 13:45:46,965 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 13:45:47,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 13:45:47,337 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 13:45:47,341 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 13:45:47,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 13:45:47,343 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 13:45:47,344 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label47.c [2020-10-12 13:45:47,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed627ba7e/bb28dcf7d60f42bb960b3c6ce8d9584d/FLAGcd32735c4 [2020-10-12 13:45:48,264 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 13:45:48,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label47.c [2020-10-12 13:45:48,307 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed627ba7e/bb28dcf7d60f42bb960b3c6ce8d9584d/FLAGcd32735c4 [2020-10-12 13:45:48,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ed627ba7e/bb28dcf7d60f42bb960b3c6ce8d9584d [2020-10-12 13:45:48,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 13:45:48,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 13:45:48,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 13:45:48,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 13:45:48,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 13:45:48,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:45:48" (1/1) ... [2020-10-12 13:45:48,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:48, skipping insertion in model container [2020-10-12 13:45:48,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 01:45:48" (1/1) ... [2020-10-12 13:45:48,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 13:45:49,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 13:45:50,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:45:50,868 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 13:45:51,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 13:45:51,720 INFO L208 MainTranslator]: Completed translation [2020-10-12 13:45:51,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51 WrapperNode [2020-10-12 13:45:51,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 13:45:51,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 13:45:51,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 13:45:51,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 13:45:51,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:51,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:51,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:51,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:51,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:52,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:52,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (1/1) ... [2020-10-12 13:45:52,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 13:45:52,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 13:45:52,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 13:45:52,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 13:45:52,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (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 13:45:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 13:45:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 13:45:52,182 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-12 13:45:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-12 13:45:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-12 13:45:52,183 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-12 13:45:52,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 13:45:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-12 13:45:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-12 13:45:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-12 13:45:52,184 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-12 13:45:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 13:45:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 13:45:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 13:45:52,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 13:45:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 13:45:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 13:46:03,868 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 13:46:03,869 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 13:46:03,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:46:03 BoogieIcfgContainer [2020-10-12 13:46:03,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 13:46:03,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 13:46:03,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 13:46:03,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 13:46:03,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 01:45:48" (1/3) ... [2020-10-12 13:46:03,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a0ac15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:46:03, skipping insertion in model container [2020-10-12 13:46:03,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 01:45:51" (2/3) ... [2020-10-12 13:46:03,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a0ac15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 01:46:03, skipping insertion in model container [2020-10-12 13:46:03,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 01:46:03" (3/3) ... [2020-10-12 13:46:03,892 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label47.c [2020-10-12 13:46:03,905 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 13:46:03,915 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 13:46:03,931 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 13:46:03,964 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 13:46:03,964 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 13:46:03,964 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 13:46:03,964 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 13:46:03,965 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 13:46:03,965 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 13:46:03,965 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 13:46:03,965 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 13:46:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-12 13:46:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 13:46:04,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:46:04,019 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] [2020-10-12 13:46:04,020 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:46:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:46:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1544453024, now seen corresponding path program 1 times [2020-10-12 13:46:04,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:46:04,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428738379] [2020-10-12 13:46:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:46:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:04,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:04,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:04,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 13:46:04,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:04,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-12 13:46:04,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:04,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:46:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:46:04,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 13:46:04,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 13:46:04,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:46:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:04,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:04,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:04,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:46:04,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 13:46:04,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:46:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:46:04,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:46:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:04,927 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 13:46:04,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428738379] [2020-10-12 13:46:04,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:46:04,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 13:46:04,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823325684] [2020-10-12 13:46:04,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 13:46:04,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:46:04,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 13:46:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 13:46:04,965 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-12 13:46:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:46:25,420 INFO L93 Difference]: Finished difference Result 3152 states and 5831 transitions. [2020-10-12 13:46:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:46:25,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-12 13:46:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:46:25,462 INFO L225 Difference]: With dead ends: 3152 [2020-10-12 13:46:25,462 INFO L226 Difference]: Without dead ends: 1954 [2020-10-12 13:46:25,474 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 13:46:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-10-12 13:46:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1885. [2020-10-12 13:46:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-10-12 13:46:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 3103 transitions. [2020-10-12 13:46:25,668 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 3103 transitions. Word has length 49 [2020-10-12 13:46:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:46:25,669 INFO L479 AbstractCegarLoop]: Abstraction has 1885 states and 3103 transitions. [2020-10-12 13:46:25,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 13:46:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 3103 transitions. [2020-10-12 13:46:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 13:46:25,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:46:25,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 13:46:25,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 13:46:25,677 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:46:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:46:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 505281256, now seen corresponding path program 1 times [2020-10-12 13:46:25,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:46:25,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598015976] [2020-10-12 13:46:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:46:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:25,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:26,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:27,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:27,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-12 13:46:27,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:46:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-12 13:46:27,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:46:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:46:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:46:27,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 13:46:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:46:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:27,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:27,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:27,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:46:27,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:27,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 13:46:27,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:27,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:46:27,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:46:27,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:46:27,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:46:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:46:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:27,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 13:46:27,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 13:46:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:46:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:46:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 13:46:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:46:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:46:27,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598015976] [2020-10-12 13:46:27,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:46:27,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 13:46:27,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637579544] [2020-10-12 13:46:27,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:46:27,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:46:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:46:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:46:27,857 INFO L87 Difference]: Start difference. First operand 1885 states and 3103 transitions. Second operand 8 states. [2020-10-12 13:46:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:46:55,024 INFO L93 Difference]: Finished difference Result 7209 states and 12017 transitions. [2020-10-12 13:46:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 13:46:55,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2020-10-12 13:46:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:46:55,063 INFO L225 Difference]: With dead ends: 7209 [2020-10-12 13:46:55,063 INFO L226 Difference]: Without dead ends: 5330 [2020-10-12 13:46:55,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-12 13:46:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5330 states. [2020-10-12 13:46:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5330 to 5275. [2020-10-12 13:46:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5275 states. [2020-10-12 13:46:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5275 states to 5275 states and 7762 transitions. [2020-10-12 13:46:55,276 INFO L78 Accepts]: Start accepts. Automaton has 5275 states and 7762 transitions. Word has length 119 [2020-10-12 13:46:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:46:55,279 INFO L479 AbstractCegarLoop]: Abstraction has 5275 states and 7762 transitions. [2020-10-12 13:46:55,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:46:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5275 states and 7762 transitions. [2020-10-12 13:46:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 13:46:55,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:46:55,290 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-12 13:46:55,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 13:46:55,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:46:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:46:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash -488936578, now seen corresponding path program 1 times [2020-10-12 13:46:55,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:46:55,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953784417] [2020-10-12 13:46:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:46:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:55,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:56,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:56,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 13:46:56,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:46:56,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-10-12 13:46:56,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:46:56,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:46:56,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:46:56,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:56,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:46:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:56,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:56,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:46:56,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:56,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 13:46:56,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:46:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:46:56,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:46:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:46:56,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:46:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:46:56,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:46:56,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:46:56,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 13:46:56,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:46:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 13:46:56,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:46:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:46:56,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:46:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 13:46:56,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:46:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 13:46:57,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953784417] [2020-10-12 13:46:57,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 13:46:57,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 13:46:57,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684676848] [2020-10-12 13:46:57,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:46:57,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:46:57,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:46:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:46:57,055 INFO L87 Difference]: Start difference. First operand 5275 states and 7762 transitions. Second operand 7 states. [2020-10-12 13:47:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:47:22,293 INFO L93 Difference]: Finished difference Result 15092 states and 22630 transitions. [2020-10-12 13:47:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 13:47:22,294 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-12 13:47:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:47:22,350 INFO L225 Difference]: With dead ends: 15092 [2020-10-12 13:47:22,350 INFO L226 Difference]: Without dead ends: 9823 [2020-10-12 13:47:22,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 13:47:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9823 states. [2020-10-12 13:47:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9823 to 9674. [2020-10-12 13:47:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9674 states. [2020-10-12 13:47:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 13391 transitions. [2020-10-12 13:47:22,701 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 13391 transitions. Word has length 139 [2020-10-12 13:47:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:47:22,704 INFO L479 AbstractCegarLoop]: Abstraction has 9674 states and 13391 transitions. [2020-10-12 13:47:22,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:47:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 13391 transitions. [2020-10-12 13:47:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-12 13:47:22,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:47:22,711 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:47:22,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 13:47:22,712 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:47:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:47:22,715 INFO L82 PathProgramCache]: Analyzing trace with hash 426962268, now seen corresponding path program 1 times [2020-10-12 13:47:22,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:47:22,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789094862] [2020-10-12 13:47:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:47:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:22,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:23,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:24,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:27,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:27,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-12 13:47:27,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 13:47:27,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 13:47:27,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:47:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:47:27,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-12 13:47:27,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 13:47:27,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:47:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:27,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:27,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:27,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:47:27,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:47:27,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 13:47:27,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:47:27,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:47:27,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:47:27,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:47:27,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:47:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:28,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:28,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:47:28,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:47:28,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-12 13:47:28,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:28,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:47:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:47:28,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:47:28,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:47:28,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:47:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:47:28,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:47:28,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:47:28,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 13:47:28,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:47:28,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-12 13:47:28,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:47:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:47:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:47:28,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 13:47:28,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:47:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 13:47:28,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789094862] [2020-10-12 13:47:28,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:47:28,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:47:28,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706074815] [2020-10-12 13:47:28,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:47:28,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:47:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:47:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:47:28,408 INFO L87 Difference]: Start difference. First operand 9674 states and 13391 transitions. Second operand 8 states. [2020-10-12 13:48:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:48:04,242 INFO L93 Difference]: Finished difference Result 22126 states and 33118 transitions. [2020-10-12 13:48:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 13:48:04,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 217 [2020-10-12 13:48:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:48:04,339 INFO L225 Difference]: With dead ends: 22126 [2020-10-12 13:48:04,339 INFO L226 Difference]: Without dead ends: 12458 [2020-10-12 13:48:04,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-12 13:48:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2020-10-12 13:48:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 12007. [2020-10-12 13:48:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12007 states. [2020-10-12 13:48:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12007 states to 12007 states and 16757 transitions. [2020-10-12 13:48:04,791 INFO L78 Accepts]: Start accepts. Automaton has 12007 states and 16757 transitions. Word has length 217 [2020-10-12 13:48:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:48:04,793 INFO L479 AbstractCegarLoop]: Abstraction has 12007 states and 16757 transitions. [2020-10-12 13:48:04,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:48:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 12007 states and 16757 transitions. [2020-10-12 13:48:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-12 13:48:04,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:48:04,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:48:04,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 13:48:04,801 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:48:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:48:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1053211464, now seen corresponding path program 1 times [2020-10-12 13:48:04,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:48:04,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738693939] [2020-10-12 13:48:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:48:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:05,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:06,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:06,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:09,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:09,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-12 13:48:09,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 13:48:09,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4651 [2020-10-12 13:48:09,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 13:48:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:48:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-12 13:48:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:09,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:48:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:09,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:09,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:48:09,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:09,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 13:48:09,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:09,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:48:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:48:09,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:48:09,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:09,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:48:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:09,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:48:09,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:48:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 13:48:09,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:48:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:48:09,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:48:09,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:10,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:48:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:10,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:10,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:10,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 13:48:10,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:10,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 13:48:10,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:48:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:48:10,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 13:48:10,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 13:48:10,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738693939] [2020-10-12 13:48:10,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:48:10,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:48:10,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251419142] [2020-10-12 13:48:10,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 13:48:10,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:48:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 13:48:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 13:48:10,718 INFO L87 Difference]: Start difference. First operand 12007 states and 16757 transitions. Second operand 8 states. [2020-10-12 13:48:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:48:37,404 INFO L93 Difference]: Finished difference Result 34325 states and 51996 transitions. [2020-10-12 13:48:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 13:48:37,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 231 [2020-10-12 13:48:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:48:37,506 INFO L225 Difference]: With dead ends: 34325 [2020-10-12 13:48:37,506 INFO L226 Difference]: Without dead ends: 23127 [2020-10-12 13:48:37,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 13:48:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23127 states. [2020-10-12 13:48:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23127 to 22783. [2020-10-12 13:48:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22783 states. [2020-10-12 13:48:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22783 states to 22783 states and 30674 transitions. [2020-10-12 13:48:38,226 INFO L78 Accepts]: Start accepts. Automaton has 22783 states and 30674 transitions. Word has length 231 [2020-10-12 13:48:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:48:38,227 INFO L479 AbstractCegarLoop]: Abstraction has 22783 states and 30674 transitions. [2020-10-12 13:48:38,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 13:48:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22783 states and 30674 transitions. [2020-10-12 13:48:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-12 13:48:38,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:48:38,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:48:38,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 13:48:38,233 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:48:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:48:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1773855388, now seen corresponding path program 1 times [2020-10-12 13:48:38,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:48:38,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979649625] [2020-10-12 13:48:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:48:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:38,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:38,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:43,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:43,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 13:48:43,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 13:48:43,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 13:48:43,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 13:48:43,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 13:48:43,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 13:48:43,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:43,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:48:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:43,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:43,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:48:43,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:43,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 13:48:43,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:43,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:48:43,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:48:43,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 13:48:43,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:48:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:43,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:43,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:43,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 13:48:43,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:43,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-12 13:48:43,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:43,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:48:43,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-12 13:48:43,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 13:48:43,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:48:44,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-12 13:48:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:48:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:48:44,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:48:44,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 13:48:44,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:48:44,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-12 13:48:44,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:48:44,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:48:44,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-12 13:48:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:48:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 13:48:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 84 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 13:48:44,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979649625] [2020-10-12 13:48:44,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:48:44,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 13:48:44,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953190365] [2020-10-12 13:48:44,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 13:48:44,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:48:44,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 13:48:44,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 13:48:44,451 INFO L87 Difference]: Start difference. First operand 22783 states and 30674 transitions. Second operand 7 states. [2020-10-12 13:49:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:49:12,170 INFO L93 Difference]: Finished difference Result 45230 states and 61647 transitions. [2020-10-12 13:49:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 13:49:12,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2020-10-12 13:49:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:49:12,269 INFO L225 Difference]: With dead ends: 45230 [2020-10-12 13:49:12,269 INFO L226 Difference]: Without dead ends: 23256 [2020-10-12 13:49:12,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 13:49:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23256 states. [2020-10-12 13:49:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23256 to 22908. [2020-10-12 13:49:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22908 states. [2020-10-12 13:49:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22908 states to 22908 states and 30977 transitions. [2020-10-12 13:49:12,935 INFO L78 Accepts]: Start accepts. Automaton has 22908 states and 30977 transitions. Word has length 249 [2020-10-12 13:49:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:49:12,936 INFO L479 AbstractCegarLoop]: Abstraction has 22908 states and 30977 transitions. [2020-10-12 13:49:12,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 13:49:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22908 states and 30977 transitions. [2020-10-12 13:49:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-12 13:49:12,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:49:12,942 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 13:49:12,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 13:49:12,942 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:49:12,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:49:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash 766051468, now seen corresponding path program 1 times [2020-10-12 13:49:12,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:49:12,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887423532] [2020-10-12 13:49:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:49:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:13,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:13,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-12 13:49:13,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 13:49:13,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 952 [2020-10-12 13:49:13,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:13,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 13:49:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 219 [2020-10-12 13:49:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 13:49:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:14,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 13:49:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:14,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:14,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 13:49:14,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:14,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 13:49:14,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:14,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:49:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:49:14,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:49:14,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:14,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 13:49:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:14,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 13:49:14,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 13:49:14,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 13:49:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:49:14,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 13:49:14,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-12 13:49:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:14,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:14,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 13:49:14,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 13:49:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 13:49:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 13:49:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 13:49:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 13:49:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 13:49:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 13:49:14,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 13:49:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-12 13:49:14,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887423532] [2020-10-12 13:49:14,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 13:49:14,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 13:49:14,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207092319] [2020-10-12 13:49:14,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 13:49:14,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 13:49:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 13:49:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 13:49:14,811 INFO L87 Difference]: Start difference. First operand 22908 states and 30977 transitions. Second operand 5 states. [2020-10-12 13:49:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 13:49:41,020 INFO L93 Difference]: Finished difference Result 45855 states and 63590 transitions. [2020-10-12 13:49:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 13:49:41,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 256 [2020-10-12 13:49:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 13:49:41,093 INFO L225 Difference]: With dead ends: 45855 [2020-10-12 13:49:41,093 INFO L226 Difference]: Without dead ends: 23756 [2020-10-12 13:49:41,128 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 [2020-10-12 13:49:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23756 states. [2020-10-12 13:49:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23756 to 23698. [2020-10-12 13:49:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23698 states. [2020-10-12 13:49:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23698 states to 23698 states and 30271 transitions. [2020-10-12 13:49:41,652 INFO L78 Accepts]: Start accepts. Automaton has 23698 states and 30271 transitions. Word has length 256 [2020-10-12 13:49:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 13:49:41,653 INFO L479 AbstractCegarLoop]: Abstraction has 23698 states and 30271 transitions. [2020-10-12 13:49:41,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 13:49:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23698 states and 30271 transitions. [2020-10-12 13:49:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-12 13:49:41,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 13:49:41,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-10-12 13:49:41,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 13:49:41,661 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 13:49:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 13:49:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash -16165935, now seen corresponding path program 1 times [2020-10-12 13:49:41,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 13:49:41,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441659118] [2020-10-12 13:49:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 13:49:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 13:49:41,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:41,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 13:49:42,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking...