/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:10:46,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:10:46,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:10:46,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:10:46,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:10:46,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:10:46,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:10:46,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:10:46,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:10:46,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:10:46,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:10:46,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:10:46,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:10:47,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:10:47,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:10:47,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:10:47,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:10:47,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:10:47,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:10:47,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:10:47,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:10:47,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:10:47,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:10:47,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:10:47,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:10:47,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:10:47,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:10:47,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:10:47,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:10:47,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:10:47,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:10:47,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:10:47,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:10:47,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:10:47,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:10:47,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:10:47,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:10:47,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:10:47,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:10:47,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:10:47,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:10:47,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 10:10:47,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:10:47,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:10:47,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:10:47,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:10:47,106 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:10:47,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:10:47,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:10:47,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:10:47,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:10:47,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:10:47,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:10:47,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:10:47,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:10:47,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:10:47,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:10:47,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:10:47,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:10:47,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:10:47,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:10:47,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:10:47,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:10:47,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:10:47,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:10:47,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:10:47,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:10:47,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:10:47,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:10:47,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:10:47,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:10:47,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:10:47,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:10:47,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:10:47,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:10:47,650 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:10:47,651 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:10:47,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-25 10:10:47,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/661cdbf3b/c26570da47c14e6ba2cc8fbe15cf16cb/FLAG80db7e61e [2020-09-25 10:10:48,376 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:10:48,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-25 10:10:48,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/661cdbf3b/c26570da47c14e6ba2cc8fbe15cf16cb/FLAG80db7e61e [2020-09-25 10:10:48,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/661cdbf3b/c26570da47c14e6ba2cc8fbe15cf16cb [2020-09-25 10:10:48,658 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:10:48,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:10:48,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:10:48,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:10:48,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:10:48,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:10:48" (1/1) ... [2020-09-25 10:10:48,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:48, skipping insertion in model container [2020-09-25 10:10:48,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:10:48" (1/1) ... [2020-09-25 10:10:48,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:10:48,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:10:49,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:10:49,230 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:10:49,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:10:49,463 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:10:49,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49 WrapperNode [2020-09-25 10:10:49,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:10:49,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:10:49,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:10:49,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:10:49,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (1/1) ... [2020-09-25 10:10:49,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:10:49,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:10:49,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:10:49,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:10:49,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (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 [2020-09-25 10:10:49,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:10:49,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:10:49,669 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:10:49,669 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:10:49,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:10:49,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:10:51,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:10:51,048 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:10:51,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:10:51 BoogieIcfgContainer [2020-09-25 10:10:51,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:10:51,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:10:51,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:10:51,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:10:51,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:10:48" (1/3) ... [2020-09-25 10:10:51,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:10:51, skipping insertion in model container [2020-09-25 10:10:51,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:10:49" (2/3) ... [2020-09-25 10:10:51,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1c64d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:10:51, skipping insertion in model container [2020-09-25 10:10:51,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:10:51" (3/3) ... [2020-09-25 10:10:51,068 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label56.c [2020-09-25 10:10:51,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:10:51,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:10:51,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:10:51,153 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:10:51,153 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:10:51,153 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:10:51,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:10:51,154 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:10:51,154 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:10:51,154 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:10:51,154 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:10:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 10:10:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 10:10:51,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:10:51,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:10:51,213 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:10:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:10:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash -934155158, now seen corresponding path program 1 times [2020-09-25 10:10:51,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:10:51,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400466314] [2020-09-25 10:10:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:10:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:51,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:52,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:56,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:56,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:56,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 10:10:56,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:10:56,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-09-25 10:10:56,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:56,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:56,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:10:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:10:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-25 10:10:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:10:56,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:10:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:56,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:56,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:10:56,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:10:56,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:10:56,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 10:10:56,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:10:56,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:10:56,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:10:56,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:10:56,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 10:10:56,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:10:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:10:57,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400466314] [2020-09-25 10:10:57,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:10:57,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:10:57,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891207635] [2020-09-25 10:10:57,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:10:57,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:10:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:10:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:10:57,062 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 10:10:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:10:59,466 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 10:10:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:10:59,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-09-25 10:10:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:10:59,503 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 10:10:59,504 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 10:10:59,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:10:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 10:10:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 10:10:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 10:10:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 10:10:59,637 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 149 [2020-09-25 10:10:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:10:59,638 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 10:10:59,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:10:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 10:10:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-25 10:10:59,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:10:59,654 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:10:59,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:10:59,655 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:10:59,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:10:59,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1111409233, now seen corresponding path program 1 times [2020-09-25 10:10:59,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:10:59,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156482009] [2020-09-25 10:10:59,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:10:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:10:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:10:59,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:00,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:04,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:04,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:04,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-25 10:11:04,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:11:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 10:11:04,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:04,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 10:11:04,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-09-25 10:11:04,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:04,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:11:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:04,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:04,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:04,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:11:04,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:04,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 10:11:04,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:04,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:04,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:11:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:04,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:11:04,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:04,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:11:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:04,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:04,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:04,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:11:04,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:04,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 10:11:04,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:04,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:04,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:11:04,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:11:04,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 10:11:04,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 10:11:05,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156482009] [2020-09-25 10:11:05,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:11:05,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 10:11:05,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472521151] [2020-09-25 10:11:05,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 10:11:05,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:11:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 10:11:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:11:05,087 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 6 states. [2020-09-25 10:11:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:11:07,332 INFO L93 Difference]: Finished difference Result 1700 states and 2021 transitions. [2020-09-25 10:11:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 10:11:07,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2020-09-25 10:11:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:11:07,341 INFO L225 Difference]: With dead ends: 1700 [2020-09-25 10:11:07,342 INFO L226 Difference]: Without dead ends: 1101 [2020-09-25 10:11:07,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:11:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-25 10:11:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1047. [2020-09-25 10:11:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2020-09-25 10:11:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1234 transitions. [2020-09-25 10:11:07,392 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1234 transitions. Word has length 166 [2020-09-25 10:11:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:11:07,393 INFO L479 AbstractCegarLoop]: Abstraction has 1047 states and 1234 transitions. [2020-09-25 10:11:07,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 10:11:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1234 transitions. [2020-09-25 10:11:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-25 10:11:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:11:07,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:11:07,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:11:07,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:11:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:11:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -375129923, now seen corresponding path program 1 times [2020-09-25 10:11:07,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:11:07,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766087214] [2020-09-25 10:11:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:11:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:07,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:07,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:08,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:08,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:08,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:09,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:09,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:11,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:11,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:12,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-09-25 10:11:12,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 10:11:12,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 10:11:12,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:12,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 10:11:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 10:11:12,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 10:11:12,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:11:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:12,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:11:12,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:12,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 10:11:12,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:12,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:12,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:11:12,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:12,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:11:12,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:11:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:12,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:12,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:11:12,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:11:12,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 10:11:12,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:12,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:11:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:11:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 10:11:12,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:12,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:11:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:12,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:12,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 10:11:12,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:11:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 10:11:12,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:12,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:11:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 10:11:12,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:11:12,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:11:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 10:11:13,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766087214] [2020-09-25 10:11:13,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:11:13,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:11:13,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464669326] [2020-09-25 10:11:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:11:13,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:11:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:11:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:11:13,118 INFO L87 Difference]: Start difference. First operand 1047 states and 1234 transitions. Second operand 13 states. [2020-09-25 10:11:14,002 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-25 10:11:14,368 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-09-25 10:11:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:11:18,615 INFO L93 Difference]: Finished difference Result 4379 states and 5845 transitions. [2020-09-25 10:11:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 10:11:18,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 184 [2020-09-25 10:11:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:11:18,645 INFO L225 Difference]: With dead ends: 4379 [2020-09-25 10:11:18,645 INFO L226 Difference]: Without dead ends: 3126 [2020-09-25 10:11:18,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=721, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 10:11:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2020-09-25 10:11:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2727. [2020-09-25 10:11:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2727 states. [2020-09-25 10:11:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3287 transitions. [2020-09-25 10:11:18,785 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3287 transitions. Word has length 184 [2020-09-25 10:11:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:11:18,786 INFO L479 AbstractCegarLoop]: Abstraction has 2727 states and 3287 transitions. [2020-09-25 10:11:18,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:11:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3287 transitions. [2020-09-25 10:11:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-09-25 10:11:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:11:18,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:11:18,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:11:18,797 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:11:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:11:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -755789642, now seen corresponding path program 1 times [2020-09-25 10:11:18,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:11:18,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981133028] [2020-09-25 10:11:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:11:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:18,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:19,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:19,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:20,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:21,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:23,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:23,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-09-25 10:11:23,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:11:23,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 10:11:23,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:23,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:23,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 10:11:23,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 10:11:23,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-09-25 10:11:23,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:11:24,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:11:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:24,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:24,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:11:24,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:24,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:11:24,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:24,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:11:24,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:11:24,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:24,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:11:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:24,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:24,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:24,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:24,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:11:24,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:11:24,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 10:11:24,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:24,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:11:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:24,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 10:11:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:24,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:11:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:24,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:24,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:24,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 10:11:24,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:11:24,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-25 10:11:24,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:24,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 10:11:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:24,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:11:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 10:11:24,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981133028] [2020-09-25 10:11:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:11:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 10:11:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309360294] [2020-09-25 10:11:24,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 10:11:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:11:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 10:11:24,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-25 10:11:24,630 INFO L87 Difference]: Start difference. First operand 2727 states and 3287 transitions. Second operand 12 states. [2020-09-25 10:11:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:11:28,489 INFO L93 Difference]: Finished difference Result 6445 states and 8122 transitions. [2020-09-25 10:11:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:11:28,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 200 [2020-09-25 10:11:28,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:11:28,506 INFO L225 Difference]: With dead ends: 6445 [2020-09-25 10:11:28,507 INFO L226 Difference]: Without dead ends: 2354 [2020-09-25 10:11:28,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:11:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2020-09-25 10:11:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2194. [2020-09-25 10:11:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2194 states. [2020-09-25 10:11:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2539 transitions. [2020-09-25 10:11:28,584 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2539 transitions. Word has length 200 [2020-09-25 10:11:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:11:28,584 INFO L479 AbstractCegarLoop]: Abstraction has 2194 states and 2539 transitions. [2020-09-25 10:11:28,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 10:11:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2539 transitions. [2020-09-25 10:11:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-09-25 10:11:28,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:11:28,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:11:28,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:11:28,594 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:11:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:11:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 934059409, now seen corresponding path program 1 times [2020-09-25 10:11:28,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:11:28,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997456069] [2020-09-25 10:11:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:11:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:28,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:28,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:28,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:29,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:33,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:33,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-09-25 10:11:33,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 10:11:33,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 10:11:33,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:33,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:33,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 10:11:33,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-09-25 10:11:33,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-25 10:11:33,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:34,157 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-09-25 10:11:34,440 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-09-25 10:11:34,600 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2020-09-25 10:11:34,766 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-09-25 10:11:34,932 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 28 [2020-09-25 10:11:35,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:11:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:35,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:35,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:35,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:11:35,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 10:11:35,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:35,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:11:35,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:35,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:11:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:35,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 10:11:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:35,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:35,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:11:35,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:35,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 10:11:35,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:35,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:11:35,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:35,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:11:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:35,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 10:11:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:35,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:35,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:35,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 10:11:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 10:11:35,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:35,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:11:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:11:35,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:35,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-25 10:11:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:11:35,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:11:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:11:35,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:11:35,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:11:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 10:11:35,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:11:35,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:11:35,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:11:35,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:11:35,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 10:11:35,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:11:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 66 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-25 10:11:35,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997456069] [2020-09-25 10:11:35,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:11:35,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 10:11:35,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179348518] [2020-09-25 10:11:35,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 10:11:35,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:11:35,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 10:11:35,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:11:35,726 INFO L87 Difference]: Start difference. First operand 2194 states and 2539 transitions. Second operand 14 states.