/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/Problem01_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:36:28,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:36:28,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:36:28,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:36:28,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:36:28,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:36:28,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:36:28,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:36:28,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:36:28,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:36:28,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:36:28,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:36:28,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:36:28,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:36:28,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:36:28,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:36:28,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:36:28,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:36:28,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:36:28,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:36:28,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:36:28,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:36:28,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:36:28,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:36:28,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:36:28,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:36:28,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:36:28,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:36:28,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:36:28,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:36:28,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:36:28,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:36:28,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:36:28,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:36:28,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:36:28,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:36:28,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:36:28,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:36:28,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:36:28,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:36:28,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:36:28,638 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 14:36:28,684 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:36:28,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:36:28,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:36:28,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:36:28,686 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:36:28,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:36:28,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:36:28,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:36:28,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:36:28,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:36:28,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:36:28,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:36:28,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:36:28,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:36:28,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:36:28,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:36:28,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:36:28,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:36:28,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:36:28,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:36:28,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:36:28,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:36:28,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:36:28,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:36:28,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:36:28,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:36:28,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:36:28,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:36:28,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:36:28,693 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 14:36:29,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:36:29,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:36:29,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:36:29,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:36:29,175 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:36:29,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-25 14:36:29,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413c792a3/4720d95f0d1d4f2b80e3bcd7a55b9727/FLAGd5f6bf8c1 [2020-09-25 14:36:29,933 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:36:29,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-25 14:36:29,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413c792a3/4720d95f0d1d4f2b80e3bcd7a55b9727/FLAGd5f6bf8c1 [2020-09-25 14:36:30,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/413c792a3/4720d95f0d1d4f2b80e3bcd7a55b9727 [2020-09-25 14:36:30,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:36:30,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:36:30,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:36:30,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:36:30,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:36:30,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:36:30" (1/1) ... [2020-09-25 14:36:30,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605628e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:30, skipping insertion in model container [2020-09-25 14:36:30,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:36:30" (1/1) ... [2020-09-25 14:36:30,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:36:30,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:36:30,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:36:30,867 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:36:30,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:36:31,021 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:36:31,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31 WrapperNode [2020-09-25 14:36:31,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:36:31,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:36:31,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:36:31,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:36:31,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (1/1) ... [2020-09-25 14:36:31,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:36:31,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:36:31,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:36:31,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:36:31,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (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 14:36:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:36:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:36:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:36:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:36:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:36:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:36:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:36:31,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:36:32,619 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:36:32,619 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:36:32,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:36:32 BoogieIcfgContainer [2020-09-25 14:36:32,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:36:32,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:36:32,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:36:32,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:36:32,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:36:30" (1/3) ... [2020-09-25 14:36:32,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e36fc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:36:32, skipping insertion in model container [2020-09-25 14:36:32,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:36:31" (2/3) ... [2020-09-25 14:36:32,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e36fc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:36:32, skipping insertion in model container [2020-09-25 14:36:32,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:36:32" (3/3) ... [2020-09-25 14:36:32,639 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label07.c [2020-09-25 14:36:32,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:36:32,663 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:36:32,686 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:36:32,725 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:36:32,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:36:32,725 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:36:32,725 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:36:32,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:36:32,726 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:36:32,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:36:32,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:36:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 14:36:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-25 14:36:32,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:32,811 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] [2020-09-25 14:36:32,812 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:32,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1257233759, now seen corresponding path program 1 times [2020-09-25 14:36:32,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:32,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812935219] [2020-09-25 14:36:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:33,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:33,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:38,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:38,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:38,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-25 14:36:38,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:36:38,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 14:36:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:38,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:36:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 14:36:38,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 14:36:38,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:36:38,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:38,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:38,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:36:38,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 14:36:38,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:38,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:36:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 14:36:38,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:38,559 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 14:36:38,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812935219] [2020-09-25 14:36:38,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:36:38,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:36:38,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975789464] [2020-09-25 14:36:38,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:36:38,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:36:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:36:38,596 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 14:36:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:41,058 INFO L93 Difference]: Finished difference Result 1270 states and 1669 transitions. [2020-09-25 14:36:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:36:41,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-09-25 14:36:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:41,090 INFO L225 Difference]: With dead ends: 1270 [2020-09-25 14:36:41,090 INFO L226 Difference]: Without dead ends: 696 [2020-09-25 14:36:41,110 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 14:36:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-09-25 14:36:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 603. [2020-09-25 14:36:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 14:36:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 731 transitions. [2020-09-25 14:36:41,229 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 731 transitions. Word has length 132 [2020-09-25 14:36:41,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:36:41,230 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 731 transitions. [2020-09-25 14:36:41,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:36:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 731 transitions. [2020-09-25 14:36:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 14:36:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:36:41,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:36:41,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:36:41,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:36:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:36:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1159952749, now seen corresponding path program 1 times [2020-09-25 14:36:41,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:36:41,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164985536] [2020-09-25 14:36:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:36:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:41,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:41,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:41,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:46,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:46,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 14:36:46,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 14:36:46,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 14:36:46,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:46,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 14:36:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 14:36:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 14:36:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:47,004 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-09-25 14:36:47,196 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-09-25 14:36:47,380 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-09-25 14:36:47,529 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-09-25 14:36:47,691 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-09-25 14:36:47,857 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-09-25 14:36:47,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:36:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:47,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:47,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:36:47,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:36:47,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 14:36:47,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:47,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:36:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:47,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 14:36:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:47,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:36:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:36:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:36:48,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:36:48,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 14:36:48,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:36:48,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-25 14:36:48,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:36:48,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:36:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:36:48,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:36:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:36:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:36:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:36:48,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164985536] [2020-09-25 14:36:48,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:36:48,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 14:36:48,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968112362] [2020-09-25 14:36:48,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 14:36:48,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:36:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 14:36:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 14:36:48,482 INFO L87 Difference]: Start difference. First operand 603 states and 731 transitions. Second operand 20 states. [2020-09-25 14:36:49,614 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-25 14:36:49,879 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 14:36:50,206 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-09-25 14:36:50,510 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-25 14:36:50,880 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-09-25 14:36:51,611 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-09-25 14:36:52,037 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2020-09-25 14:36:52,229 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-09-25 14:36:53,003 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-09-25 14:36:53,855 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-09-25 14:36:54,174 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-09-25 14:36:54,554 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-09-25 14:36:54,900 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-09-25 14:36:55,552 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-25 14:36:56,166 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-09-25 14:36:56,617 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-25 14:36:57,278 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-09-25 14:36:57,984 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-25 14:36:58,767 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-09-25 14:36:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:36:59,924 INFO L93 Difference]: Finished difference Result 1968 states and 2591 transitions. [2020-09-25 14:36:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 14:36:59,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 154 [2020-09-25 14:36:59,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:36:59,940 INFO L225 Difference]: With dead ends: 1968 [2020-09-25 14:36:59,941 INFO L226 Difference]: Without dead ends: 1389 [2020-09-25 14:36:59,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 14:36:59,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2020-09-25 14:37:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1280. [2020-09-25 14:37:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2020-09-25 14:37:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1533 transitions. [2020-09-25 14:37:00,038 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1533 transitions. Word has length 154 [2020-09-25 14:37:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:37:00,040 INFO L479 AbstractCegarLoop]: Abstraction has 1280 states and 1533 transitions. [2020-09-25 14:37:00,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 14:37:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1533 transitions. [2020-09-25 14:37:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 14:37:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:00,049 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:37:00,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:37:00,049 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1274964758, now seen corresponding path program 1 times [2020-09-25 14:37:00,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:00,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591351349] [2020-09-25 14:37:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:00,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:00,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:01,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:01,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:02,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:03,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:05,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:05,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 14:37:05,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:37:05,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 14:37:05,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:05,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:37:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 14:37:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 14:37:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:05,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:37:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:05,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:05,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:37:05,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:05,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:37:05,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:05,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:37:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:37:05,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:05,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:37:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:05,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:05,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:05,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:37:05,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 14:37:05,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:05,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:05,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:37:05,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:05,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:37:05,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:37:05,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591351349] [2020-09-25 14:37:05,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:37:05,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:37:05,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522602080] [2020-09-25 14:37:05,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:37:05,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:37:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:37:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:37:05,442 INFO L87 Difference]: Start difference. First operand 1280 states and 1533 transitions. Second operand 5 states. [2020-09-25 14:37:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:37:07,436 INFO L93 Difference]: Finished difference Result 2998 states and 3728 transitions. [2020-09-25 14:37:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:37:07,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-09-25 14:37:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:37:07,449 INFO L225 Difference]: With dead ends: 2998 [2020-09-25 14:37:07,450 INFO L226 Difference]: Without dead ends: 1742 [2020-09-25 14:37:07,455 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 14:37:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2020-09-25 14:37:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1709. [2020-09-25 14:37:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2020-09-25 14:37:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2102 transitions. [2020-09-25 14:37:07,537 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2102 transitions. Word has length 161 [2020-09-25 14:37:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:37:07,539 INFO L479 AbstractCegarLoop]: Abstraction has 1709 states and 2102 transitions. [2020-09-25 14:37:07,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:37:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2102 transitions. [2020-09-25 14:37:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 14:37:07,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:07,549 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:07,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:37:07,550 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1406452310, now seen corresponding path program 1 times [2020-09-25 14:37:07,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:07,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783089180] [2020-09-25 14:37:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:07,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:08,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:10,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:12,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:12,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 14:37:12,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 14:37:12,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 14:37:12,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:37:12,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:37:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:12,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:12,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:12,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:37:12,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:12,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 14:37:12,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:12,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:37:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:37:12,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:12,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:37:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:12,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:12,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:12,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 14:37:12,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:37:12,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 14:37:12,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:12,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:37:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:37:12,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 14:37:12,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:12,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 14:37:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:12,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:12,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 14:37:12,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:12,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-25 14:37:12,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:12,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:12,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:37:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 14:37:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 14:37:12,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 14:37:13,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783089180] [2020-09-25 14:37:13,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:37:13,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 14:37:13,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245545309] [2020-09-25 14:37:13,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:37:13,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:37:13,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:37:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:37:13,030 INFO L87 Difference]: Start difference. First operand 1709 states and 2102 transitions. Second operand 7 states. [2020-09-25 14:37:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:37:15,197 INFO L93 Difference]: Finished difference Result 3864 states and 4879 transitions. [2020-09-25 14:37:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:37:15,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 186 [2020-09-25 14:37:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:37:15,217 INFO L225 Difference]: With dead ends: 3864 [2020-09-25 14:37:15,217 INFO L226 Difference]: Without dead ends: 2179 [2020-09-25 14:37:15,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:37:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2020-09-25 14:37:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 2148. [2020-09-25 14:37:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2148 states. [2020-09-25 14:37:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 2702 transitions. [2020-09-25 14:37:15,343 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 2702 transitions. Word has length 186 [2020-09-25 14:37:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:37:15,343 INFO L479 AbstractCegarLoop]: Abstraction has 2148 states and 2702 transitions. [2020-09-25 14:37:15,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:37:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 2702 transitions. [2020-09-25 14:37:15,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-25 14:37:15,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:15,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:37:15,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:37:15,356 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash -269597623, now seen corresponding path program 1 times [2020-09-25 14:37:15,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:15,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276052769] [2020-09-25 14:37:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:15,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:16,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:16,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:16,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:17,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:17,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking...