/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:38:42,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:38:42,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:38:42,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:38:42,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:38:42,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:38:42,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:38:42,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:38:42,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:38:42,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:38:42,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:38:42,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:38:42,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:38:42,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:38:42,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:38:42,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:38:42,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:38:42,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:38:42,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:38:42,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:38:42,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:38:42,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:38:42,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:38:42,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:38:42,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:38:42,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:38:42,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:38:42,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:38:42,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:38:42,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:38:42,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:38:42,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:38:42,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:38:42,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:38:42,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:38:42,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:38:42,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:38:42,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:38:42,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:38:42,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:38:42,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:38:42,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 14:38:42,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:38:42,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:38:42,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:38:42,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:38:42,373 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:38:42,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:38:42,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:38:42,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:38:42,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:38:42,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:38:42,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:38:42,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:38:42,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:38:42,375 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:38:42,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:38:42,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:38:42,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:38:42,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:38:42,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:38:42,376 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:38:42,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:38:42,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:38:42,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:38:42,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:38:42,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:38:42,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:38:42,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:38:42,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:38:42,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:38:42,379 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:38:42,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:38:42,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:38:42,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:38:42,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:38:42,835 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:38:42,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2020-09-25 14:38:42,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9302e99aa/3950b22a3ad745d98b2e84db105be28c/FLAG9168802c4 [2020-09-25 14:38:43,582 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:38:43,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label11.c [2020-09-25 14:38:43,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9302e99aa/3950b22a3ad745d98b2e84db105be28c/FLAG9168802c4 [2020-09-25 14:38:43,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9302e99aa/3950b22a3ad745d98b2e84db105be28c [2020-09-25 14:38:43,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:38:43,864 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:38:43,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:38:43,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:38:43,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:38:43,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:38:43" (1/1) ... [2020-09-25 14:38:43,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd4ce29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:43, skipping insertion in model container [2020-09-25 14:38:43,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:38:43" (1/1) ... [2020-09-25 14:38:43,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:38:43,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:38:44,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:38:44,577 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:38:44,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:38:44,700 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:38:44,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44 WrapperNode [2020-09-25 14:38:44,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:38:44,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:38:44,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:38:44,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:38:44,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... [2020-09-25 14:38:44,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:38:44,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:38:44,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:38:44,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:38:44,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:38:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:38:44,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:38:44,935 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:38:44,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:38:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:38:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:38:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:38:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:38:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:38:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:38:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:38:46,359 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:38:46,359 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:38:46,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:38:46 BoogieIcfgContainer [2020-09-25 14:38:46,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:38:46,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:38:46,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:38:46,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:38:46,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:38:43" (1/3) ... [2020-09-25 14:38:46,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13789e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:38:46, skipping insertion in model container [2020-09-25 14:38:46,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:38:44" (2/3) ... [2020-09-25 14:38:46,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13789e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:38:46, skipping insertion in model container [2020-09-25 14:38:46,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:38:46" (3/3) ... [2020-09-25 14:38:46,378 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label11.c [2020-09-25 14:38:46,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:38:46,401 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:38:46,426 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:38:46,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:38:46,466 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:38:46,466 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:38:46,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:38:46,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:38:46,466 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:38:46,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:38:46,467 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:38:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 14:38:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-25 14:38:46,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:46,523 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] [2020-09-25 14:38:46,524 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash 604783425, now seen corresponding path program 1 times [2020-09-25 14:38:46,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:46,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389131884] [2020-09-25 14:38:46,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:46,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:49,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:51,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:51,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-09-25 14:38:51,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:38:51,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-09-25 14:38:51,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:51,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:38:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 14:38:51,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 14:38:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:38:52,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:52,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:38:52,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 14:38:52,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:52,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:38:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:38:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:38:52,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389131884] [2020-09-25 14:38:52,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:38:52,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:38:52,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917167055] [2020-09-25 14:38:52,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:38:52,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:52,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:38:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:38:52,274 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 14:38:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:54,794 INFO L93 Difference]: Finished difference Result 1387 states and 1841 transitions. [2020-09-25 14:38:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:38:54,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-09-25 14:38:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:54,825 INFO L225 Difference]: With dead ends: 1387 [2020-09-25 14:38:54,825 INFO L226 Difference]: Without dead ends: 779 [2020-09-25 14:38:54,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:38:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-09-25 14:38:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 659. [2020-09-25 14:38:54,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 659 states. [2020-09-25 14:38:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 807 transitions. [2020-09-25 14:38:54,950 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 807 transitions. Word has length 134 [2020-09-25 14:38:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:54,951 INFO L479 AbstractCegarLoop]: Abstraction has 659 states and 807 transitions. [2020-09-25 14:38:54,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:38:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 807 transitions. [2020-09-25 14:38:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 14:38:54,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:54,961 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:38:54,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:38:54,961 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1174704491, now seen corresponding path program 1 times [2020-09-25 14:38:54,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:54,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561753522] [2020-09-25 14:38:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:55,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:55,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:57,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:57,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:57,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:59,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:59,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:00,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 14:39:00,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:39:00,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:39:00,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:00,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 14:39:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 14:39:00,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:39:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:00,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:00,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:00,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:00,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:39:00,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:00,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:00,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 14:39:00,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:00,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:00,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 14:39:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:39:00,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:00,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 14:39:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:00,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561753522] [2020-09-25 14:39:00,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:00,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:00,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831773365] [2020-09-25 14:39:00,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:00,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:00,305 INFO L87 Difference]: Start difference. First operand 659 states and 807 transitions. Second operand 5 states. [2020-09-25 14:39:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:02,681 INFO L93 Difference]: Finished difference Result 1648 states and 2113 transitions. [2020-09-25 14:39:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:02,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-25 14:39:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:02,693 INFO L225 Difference]: With dead ends: 1648 [2020-09-25 14:39:02,694 INFO L226 Difference]: Without dead ends: 1011 [2020-09-25 14:39:02,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-09-25 14:39:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 965. [2020-09-25 14:39:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-09-25 14:39:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1175 transitions. [2020-09-25 14:39:02,753 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1175 transitions. Word has length 152 [2020-09-25 14:39:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:02,754 INFO L479 AbstractCegarLoop]: Abstraction has 965 states and 1175 transitions. [2020-09-25 14:39:02,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1175 transitions. [2020-09-25 14:39:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 14:39:02,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:02,759 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] [2020-09-25 14:39:02,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:39:02,760 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:02,760 INFO L82 PathProgramCache]: Analyzing trace with hash -229206602, now seen corresponding path program 1 times [2020-09-25 14:39:02,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:02,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061223891] [2020-09-25 14:39:02,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:04,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:07,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:07,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:07,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 14:39:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 14:39:07,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:07,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 14:39:07,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 14:39:07,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 14:39:07,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:08,429 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-09-25 14:39:08,648 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-09-25 14:39:08,869 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-09-25 14:39:09,091 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2020-09-25 14:39:09,253 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2020-09-25 14:39:09,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:09,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:09,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:09,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 14:39:09,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:09,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:09,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:09,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:09,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:09,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:09,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 14:39:09,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:09,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 14:39:09,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:09,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:09,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:39:09,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:09,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:39:09,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:09,699 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 14:39:09,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061223891] [2020-09-25 14:39:09,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:09,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 14:39:09,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408520626] [2020-09-25 14:39:09,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 14:39:09,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 14:39:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:39:09,709 INFO L87 Difference]: Start difference. First operand 965 states and 1175 transitions. Second operand 13 states. [2020-09-25 14:39:10,363 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-25 14:39:10,895 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2020-09-25 14:39:11,398 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-09-25 14:39:12,055 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-09-25 14:39:12,849 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 14:39:13,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:13,629 INFO L93 Difference]: Finished difference Result 1996 states and 2510 transitions. [2020-09-25 14:39:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 14:39:13,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-09-25 14:39:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:13,642 INFO L225 Difference]: With dead ends: 1996 [2020-09-25 14:39:13,643 INFO L226 Difference]: Without dead ends: 1053 [2020-09-25 14:39:13,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-25 14:39:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2020-09-25 14:39:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1024. [2020-09-25 14:39:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-09-25 14:39:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1242 transitions. [2020-09-25 14:39:13,711 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1242 transitions. Word has length 153 [2020-09-25 14:39:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:13,712 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1242 transitions. [2020-09-25 14:39:13,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 14:39:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1242 transitions. [2020-09-25 14:39:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 14:39:13,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:13,727 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:39:13,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:39:13,728 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:13,731 INFO L82 PathProgramCache]: Analyzing trace with hash -652427357, now seen corresponding path program 1 times [2020-09-25 14:39:13,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:13,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002952109] [2020-09-25 14:39:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:13,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:13,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:15,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:17,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:17,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:17,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:18,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:18,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-25 14:39:18,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:39:18,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 14:39:18,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:18,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:18,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:18,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 14:39:18,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 14:39:18,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:18,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:18,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:18,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:18,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:18,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:18,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:39:18,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:18,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:18,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:18,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:18,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:18,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:18,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:18,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:18,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 14:39:18,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:18,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 14:39:18,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:18,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:18,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:18,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:39:18,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:19,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002952109] [2020-09-25 14:39:19,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:19,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:19,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141299193] [2020-09-25 14:39:19,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:19,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:19,041 INFO L87 Difference]: Start difference. First operand 1024 states and 1242 transitions. Second operand 5 states. [2020-09-25 14:39:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:20,825 INFO L93 Difference]: Finished difference Result 2652 states and 3345 transitions. [2020-09-25 14:39:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:20,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-09-25 14:39:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:20,842 INFO L225 Difference]: With dead ends: 2652 [2020-09-25 14:39:20,843 INFO L226 Difference]: Without dead ends: 1650 [2020-09-25 14:39:20,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2020-09-25 14:39:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1480. [2020-09-25 14:39:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1480 states. [2020-09-25 14:39:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1858 transitions. [2020-09-25 14:39:20,917 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1858 transitions. Word has length 156 [2020-09-25 14:39:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:20,918 INFO L479 AbstractCegarLoop]: Abstraction has 1480 states and 1858 transitions. [2020-09-25 14:39:20,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1858 transitions. [2020-09-25 14:39:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 14:39:20,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:20,925 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:39:20,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:39:20,925 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1502935322, now seen corresponding path program 1 times [2020-09-25 14:39:20,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:20,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962308114] [2020-09-25 14:39:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:24,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3908 [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 14:39:24,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-09-25 14:39:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:24,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:24,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:24,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:24,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:24,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:39:24,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:24,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:24,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:24,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:25,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:25,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 14:39:25,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:25,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 14:39:25,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:25,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:25,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:25,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 14:39:25,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:25,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962308114] [2020-09-25 14:39:25,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:25,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:25,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005879657] [2020-09-25 14:39:25,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:25,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:25,050 INFO L87 Difference]: Start difference. First operand 1480 states and 1858 transitions. Second operand 5 states. [2020-09-25 14:39:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:26,525 INFO L93 Difference]: Finished difference Result 3441 states and 4508 transitions. [2020-09-25 14:39:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:26,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-09-25 14:39:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:26,540 INFO L225 Difference]: With dead ends: 3441 [2020-09-25 14:39:26,541 INFO L226 Difference]: Without dead ends: 1983 [2020-09-25 14:39:26,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2020-09-25 14:39:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1938. [2020-09-25 14:39:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1938 states. [2020-09-25 14:39:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2384 transitions. [2020-09-25 14:39:26,619 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2384 transitions. Word has length 160 [2020-09-25 14:39:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:26,619 INFO L479 AbstractCegarLoop]: Abstraction has 1938 states and 2384 transitions. [2020-09-25 14:39:26,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2384 transitions. [2020-09-25 14:39:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-09-25 14:39:26,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:26,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:26,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:39:26,629 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1654545545, now seen corresponding path program 1 times [2020-09-25 14:39:26,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:26,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019471649] [2020-09-25 14:39:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:26,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:27,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:28,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking...