/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=0.4 --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/Problem01_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:28:41,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:28:41,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:28:41,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:28:41,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:28:41,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:28:41,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:28:41,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:28:41,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:28:41,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:28:41,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:28:41,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:28:41,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:28:41,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:28:41,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:28:41,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:28:41,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:28:41,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:28:41,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:28:41,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:28:41,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:28:41,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:28:41,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:28:41,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:28:41,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:28:41,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:28:41,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:28:41,492 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:28:41,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:28:41,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:28:41,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:28:41,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:28:41,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:28:41,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:28:41,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:28:41,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:28:41,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:28:41,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:28:41,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:28:41,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:28:41,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:28:41,507 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 13:28:41,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:28:41,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:28:41,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:28:41,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:28:41,534 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:28:41,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:28:41,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:28:41,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:28:41,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:28:41,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:28:41,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:28:41,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:28:41,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:28:41,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:28:41,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:28:41,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:28:41,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:28:41,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:28:41,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:28:41,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:28:41,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:28:41,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:28:41,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:28:41,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:28:41,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:28:41,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:28:41,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:28:41,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:28:41,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:28:41,539 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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-09-25 13:28:41,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:28:41,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:28:42,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:28:42,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:28:42,006 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:28:42,007 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 13:28:42,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b7ff6eb/102583286d324e528fb30b9bb273db4c/FLAGcafc0ec32 [2020-09-25 13:28:42,752 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:28:42,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 13:28:42,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b7ff6eb/102583286d324e528fb30b9bb273db4c/FLAGcafc0ec32 [2020-09-25 13:28:42,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/97b7ff6eb/102583286d324e528fb30b9bb273db4c [2020-09-25 13:28:42,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:28:42,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:28:42,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:28:42,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:28:43,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:28:43,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:28:42" (1/1) ... [2020-09-25 13:28:43,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112bbb30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43, skipping insertion in model container [2020-09-25 13:28:43,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:28:42" (1/1) ... [2020-09-25 13:28:43,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:28:43,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:28:43,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:28:43,627 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:28:43,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:28:43,741 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:28:43,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43 WrapperNode [2020-09-25 13:28:43,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:28:43,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:28:43,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:28:43,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:28:43,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (1/1) ... [2020-09-25 13:28:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:28:43,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:28:43,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:28:43,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:28:43,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (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 13:28:43,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:28:43,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:28:43,958 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 13:28:43,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:28:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 13:28:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:28:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:28:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:28:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:28:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:28:43,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:28:45,256 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:28:45,257 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:28:45,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:28:45 BoogieIcfgContainer [2020-09-25 13:28:45,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:28:45,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:28:45,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:28:45,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:28:45,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:28:42" (1/3) ... [2020-09-25 13:28:45,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad18132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:28:45, skipping insertion in model container [2020-09-25 13:28:45,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:28:43" (2/3) ... [2020-09-25 13:28:45,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad18132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:28:45, skipping insertion in model container [2020-09-25 13:28:45,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:28:45" (3/3) ... [2020-09-25 13:28:45,276 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2020-09-25 13:28:45,287 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:28:45,299 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:28:45,322 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:28:45,357 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:28:45,357 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:28:45,357 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:28:45,358 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:28:45,358 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:28:45,358 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:28:45,358 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:28:45,358 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:28:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 13:28:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 13:28:45,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:28:45,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:28:45,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:28:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:28:45,429 INFO L82 PathProgramCache]: Analyzing trace with hash 730138415, now seen corresponding path program 1 times [2020-09-25 13:28:45,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:28:45,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002017105] [2020-09-25 13:28:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:28:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:47,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:48,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:49,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:50,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:50,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-25 13:28:50,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:28:50,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 13:28:50,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:50,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:28:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 13:28:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 13:28:50,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 13:28:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:28:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:50,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:50,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:50,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:28:50,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:50,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 13:28:50,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:50,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:28:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:28:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 13:28:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:51,047 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 13:28:51,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002017105] [2020-09-25 13:28:51,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:28:51,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:28:51,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284529684] [2020-09-25 13:28:51,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:28:51,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:28:51,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:28:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:28:51,086 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 13:28:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:28:53,270 INFO L93 Difference]: Finished difference Result 1340 states and 1738 transitions. [2020-09-25 13:28:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:28:53,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-09-25 13:28:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:28:53,305 INFO L225 Difference]: With dead ends: 1340 [2020-09-25 13:28:53,305 INFO L226 Difference]: Without dead ends: 741 [2020-09-25 13:28:53,316 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 13:28:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-25 13:28:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 664. [2020-09-25 13:28:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-25 13:28:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 780 transitions. [2020-09-25 13:28:53,421 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 780 transitions. Word has length 152 [2020-09-25 13:28:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:28:53,422 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 780 transitions. [2020-09-25 13:28:53,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:28:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 780 transitions. [2020-09-25 13:28:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 13:28:53,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:28:53,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:28:53,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:28:53,433 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:28:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:28:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1669034880, now seen corresponding path program 1 times [2020-09-25 13:28:53,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:28:53,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660449718] [2020-09-25 13:28:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:28:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:53,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:53,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:54,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:54,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:54,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:58,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:58,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 13:28:58,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:28:58,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 13:28:58,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:58,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 13:28:58,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 13:28:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:28:58,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:28:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:58,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:58,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:28:58,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:58,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 13:28:58,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:58,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:28:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:28:58,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:28:58,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:28:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:28:58,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:28:58,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:28:58,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 13:28:58,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:28:58,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 13:28:58,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:28:58,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:28:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:28:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:28:58,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:28:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:28:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:28:59,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660449718] [2020-09-25 13:28:59,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:28:59,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:28:59,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145174939] [2020-09-25 13:28:59,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:28:59,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:28:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:28:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:28:59,209 INFO L87 Difference]: Start difference. First operand 664 states and 780 transitions. Second operand 9 states. [2020-09-25 13:29:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:04,391 INFO L93 Difference]: Finished difference Result 2178 states and 2848 transitions. [2020-09-25 13:29:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 13:29:04,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 173 [2020-09-25 13:29:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:04,400 INFO L225 Difference]: With dead ends: 2178 [2020-09-25 13:29:04,401 INFO L226 Difference]: Without dead ends: 1100 [2020-09-25 13:29:04,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 13:29:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-09-25 13:29:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1064. [2020-09-25 13:29:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-25 13:29:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1200 transitions. [2020-09-25 13:29:04,461 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1200 transitions. Word has length 173 [2020-09-25 13:29:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:04,462 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1200 transitions. [2020-09-25 13:29:04,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:29:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1200 transitions. [2020-09-25 13:29:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-25 13:29:04,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:04,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:04,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:29:04,472 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash -139356601, now seen corresponding path program 1 times [2020-09-25 13:29:04,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361824538] [2020-09-25 13:29:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:04,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:04,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:04,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:05,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:09,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-25 13:29:09,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:29:09,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 13:29:09,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:09,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:09,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:09,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-25 13:29:09,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 13:29:09,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:09,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:09,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:09,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:09,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 13:29:09,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:09,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:09,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:09,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:09,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:09,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:09,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:09,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 13:29:09,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:09,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 13:29:09,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:09,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:09,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 13:29:09,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:09,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361824538] [2020-09-25 13:29:09,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:09,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:29:09,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593150728] [2020-09-25 13:29:09,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:09,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:09,848 INFO L87 Difference]: Start difference. First operand 1064 states and 1200 transitions. Second operand 5 states. [2020-09-25 13:29:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:11,724 INFO L93 Difference]: Finished difference Result 2456 states and 2855 transitions. [2020-09-25 13:29:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:29:11,725 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-09-25 13:29:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:11,733 INFO L225 Difference]: With dead ends: 2456 [2020-09-25 13:29:11,733 INFO L226 Difference]: Without dead ends: 1416 [2020-09-25 13:29:11,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:29:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2020-09-25 13:29:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1352. [2020-09-25 13:29:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-09-25 13:29:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1563 transitions. [2020-09-25 13:29:11,791 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1563 transitions. Word has length 178 [2020-09-25 13:29:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:11,792 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1563 transitions. [2020-09-25 13:29:11,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1563 transitions. [2020-09-25 13:29:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 13:29:11,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:11,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:11,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:29:11,800 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash -114572164, now seen corresponding path program 1 times [2020-09-25 13:29:11,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:11,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801097429] [2020-09-25 13:29:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:11,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:13,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:14,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:14,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:16,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:16,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-25 13:29:16,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 13:29:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-09-25 13:29:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:16,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 13:29:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-09-25 13:29:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-25 13:29:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:17,531 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-09-25 13:29:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:18,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:18,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:18,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:18,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:18,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:29:18,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:18,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:18,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:18,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:18,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 13:29:18,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:18,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:29:18,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:18,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:18,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:18,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:18,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:18,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:18,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 13:29:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:18,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:18,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:18,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 13:29:18,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 13:29:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:18,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:18,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 13:29:18,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 13:29:18,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801097429] [2020-09-25 13:29:18,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:18,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 13:29:18,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866836694] [2020-09-25 13:29:18,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 13:29:18,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 13:29:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 13:29:18,401 INFO L87 Difference]: Start difference. First operand 1352 states and 1563 transitions. Second operand 15 states. [2020-09-25 13:29:19,048 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-09-25 13:29:19,505 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-09-25 13:29:20,534 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-25 13:29:21,052 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-09-25 13:29:21,532 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-09-25 13:29:21,790 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-09-25 13:29:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:23,589 INFO L93 Difference]: Finished difference Result 2723 states and 3197 transitions. [2020-09-25 13:29:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 13:29:23,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-09-25 13:29:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:23,602 INFO L225 Difference]: With dead ends: 2723 [2020-09-25 13:29:23,602 INFO L226 Difference]: Without dead ends: 1395 [2020-09-25 13:29:23,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-25 13:29:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-09-25 13:29:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1349. [2020-09-25 13:29:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-09-25 13:29:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1547 transitions. [2020-09-25 13:29:23,669 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1547 transitions. Word has length 197 [2020-09-25 13:29:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:23,671 INFO L479 AbstractCegarLoop]: Abstraction has 1349 states and 1547 transitions. [2020-09-25 13:29:23,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 13:29:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1547 transitions. [2020-09-25 13:29:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-25 13:29:23,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:23,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:29:23,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:29:23,678 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1327822116, now seen corresponding path program 1 times [2020-09-25 13:29:23,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:23,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299453905] [2020-09-25 13:29:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:24,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:26,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:28,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-25 13:29:28,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:29:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-09-25 13:29:28,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:28,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:28,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:28,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-09-25 13:29:28,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-25 13:29:28,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:29:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:28,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:28,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:28,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:29:28,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:28,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:28,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:28,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:28,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:28,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:28,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 13:29:28,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 13:29:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:28,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:28,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:28,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 13:29:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:29,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:29,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:29,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:29,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 13:29:29,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:29,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:29,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:29,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 13:29:29,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 13:29:29,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299453905] [2020-09-25 13:29:29,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:29,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:29:29,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203413562] [2020-09-25 13:29:29,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:29,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:29,089 INFO L87 Difference]: Start difference. First operand 1349 states and 1547 transitions. Second operand 5 states. [2020-09-25 13:29:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:30,802 INFO L93 Difference]: Finished difference Result 3279 states and 3879 transitions. [2020-09-25 13:29:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:29:30,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-09-25 13:29:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:30,815 INFO L225 Difference]: With dead ends: 3279 [2020-09-25 13:29:30,815 INFO L226 Difference]: Without dead ends: 1954 [2020-09-25 13:29:30,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:29:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2020-09-25 13:29:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1639. [2020-09-25 13:29:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1639 states. [2020-09-25 13:29:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 1915 transitions. [2020-09-25 13:29:30,867 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 1915 transitions. Word has length 211 [2020-09-25 13:29:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:30,868 INFO L479 AbstractCegarLoop]: Abstraction has 1639 states and 1915 transitions. [2020-09-25 13:29:30,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 1915 transitions. [2020-09-25 13:29:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-25 13:29:30,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:30,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 13:29:30,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:29:30,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1114180569, now seen corresponding path program 1 times [2020-09-25 13:29:30,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:30,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166242927] [2020-09-25 13:29:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking...