/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=0.2 --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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:13:47,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:13:47,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:13:47,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:13:47,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:13:47,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:13:47,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:13:47,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:13:47,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:13:47,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:13:47,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:13:47,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:13:47,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:13:47,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:13:47,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:13:47,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:13:47,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:13:47,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:13:47,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:13:47,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:13:47,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:13:47,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:13:47,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:13:47,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:13:47,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:13:47,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:13:47,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:13:47,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:13:47,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:13:47,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:13:47,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:13:47,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:13:47,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:13:47,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:13:47,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:13:47,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:13:47,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:13:47,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:13:47,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:13:47,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:13:47,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:13:47,657 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 11:13:47,685 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:13:47,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:13:47,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:13:47,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:13:47,687 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:13:47,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:13:47,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:13:47,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:13:47,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:13:47,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:13:47,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:13:47,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:13:47,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:13:47,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:13:47,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:13:47,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:13:47,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:13:47,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:13:47,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:13:47,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:13:47,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:13:47,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:13:47,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:13:47,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:13:47,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:13:47,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:13:47,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:13:47,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:13:47,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:13:47,692 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:13:48,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:13:48,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:13:48,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:13:48,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:13:48,182 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:13:48,184 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label26.c [2020-09-25 11:13:48,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f204af1/045dc85888ce4f8baaf40d48764cf8a5/FLAG8a5879c9c [2020-09-25 11:13:48,863 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:13:48,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label26.c [2020-09-25 11:13:48,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f204af1/045dc85888ce4f8baaf40d48764cf8a5/FLAG8a5879c9c [2020-09-25 11:13:49,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8f204af1/045dc85888ce4f8baaf40d48764cf8a5 [2020-09-25 11:13:49,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:13:49,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:13:49,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:49,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:13:49,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:13:49,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:49" (1/1) ... [2020-09-25 11:13:49,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c77fbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:49, skipping insertion in model container [2020-09-25 11:13:49,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:49" (1/1) ... [2020-09-25 11:13:49,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:13:49,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:13:49,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:49,914 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:13:50,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:50,028 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:13:50,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50 WrapperNode [2020-09-25 11:13:50,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:50,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:13:50,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:13:50,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:13:50,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (1/1) ... [2020-09-25 11:13:50,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:13:50,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:13:50,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:13:50,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:13:50,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (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 11:13:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:13:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:13:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:13:50,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:13:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:13:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:13:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:13:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:13:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:13:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:13:50,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:13:51,651 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:13:51,652 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:13:51,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:51 BoogieIcfgContainer [2020-09-25 11:13:51,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:13:51,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:13:51,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:13:51,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:13:51,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:13:49" (1/3) ... [2020-09-25 11:13:51,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e7ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:51, skipping insertion in model container [2020-09-25 11:13:51,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:50" (2/3) ... [2020-09-25 11:13:51,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258e7ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:51, skipping insertion in model container [2020-09-25 11:13:51,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:51" (3/3) ... [2020-09-25 11:13:51,679 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label26.c [2020-09-25 11:13:51,690 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:13:51,705 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:13:51,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:13:51,765 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:13:51,765 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:13:51,765 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:13:51,765 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:13:51,765 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:13:51,766 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:13:51,766 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:13:51,766 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:13:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:13:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-25 11:13:51,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:51,820 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] [2020-09-25 11:13:51,820 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1760559547, now seen corresponding path program 1 times [2020-09-25 11:13:51,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:51,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994751028] [2020-09-25 11:13:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:52,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:52,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:52,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:53,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:57,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:57,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-25 11:13:57,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:13:57,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 11:13:57,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:57,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:13:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 11:13:57,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-25 11:13:57,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:13:57,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:57,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:57,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:57,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:57,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:13:57,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:57,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:57,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:57,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:13:57,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:57,424 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 11:13:57,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994751028] [2020-09-25 11:13:57,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:13:57,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:13:57,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328483417] [2020-09-25 11:13:57,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:13:57,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:13:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:13:57,455 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:13:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:59,476 INFO L93 Difference]: Finished difference Result 1268 states and 1667 transitions. [2020-09-25 11:13:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:13:59,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-09-25 11:13:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:59,506 INFO L225 Difference]: With dead ends: 1268 [2020-09-25 11:13:59,506 INFO L226 Difference]: Without dead ends: 694 [2020-09-25 11:13:59,516 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 11:13:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-09-25 11:13:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 603. [2020-09-25 11:13:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 11:13:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 719 transitions. [2020-09-25 11:13:59,617 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 719 transitions. Word has length 131 [2020-09-25 11:13:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:59,619 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 719 transitions. [2020-09-25 11:13:59,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:13:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 719 transitions. [2020-09-25 11:13:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 11:13:59,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:59,637 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] [2020-09-25 11:13:59,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:13:59,637 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 926344477, now seen corresponding path program 1 times [2020-09-25 11:13:59,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:59,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785979122] [2020-09-25 11:13:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:04,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:04,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-25 11:14:04,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:14:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 11:14:04,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:04,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 11:14:04,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 11:14:04,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-25 11:14:04,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:05,458 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-09-25 11:14:05,717 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-09-25 11:14:05,983 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 51 [2020-09-25 11:14:06,235 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2020-09-25 11:14:06,460 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 43 [2020-09-25 11:14:06,688 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2020-09-25 11:14:06,893 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-09-25 11:14:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:06,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:06,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:06,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:06,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:06,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:14:06,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:06,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:06,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:06,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:06,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:06,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:07,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:07,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:07,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:07,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:07,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 11:14:07,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:07,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 11:14:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:14:07,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:07,256 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 11:14:07,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785979122] [2020-09-25 11:14:07,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:07,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 11:14:07,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716830142] [2020-09-25 11:14:07,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 11:14:07,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 11:14:07,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:14:07,260 INFO L87 Difference]: Start difference. First operand 603 states and 719 transitions. Second operand 14 states. [2020-09-25 11:14:07,987 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-25 11:14:08,195 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-09-25 11:14:08,651 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 114 [2020-09-25 11:14:09,220 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2020-09-25 11:14:09,582 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 108 [2020-09-25 11:14:09,821 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-09-25 11:14:10,594 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 105 [2020-09-25 11:14:10,824 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-09-25 11:14:11,611 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2020-09-25 11:14:12,125 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-09-25 11:14:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:12,308 INFO L93 Difference]: Finished difference Result 1284 states and 1593 transitions. [2020-09-25 11:14:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:14:12,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 152 [2020-09-25 11:14:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:12,314 INFO L225 Difference]: With dead ends: 1284 [2020-09-25 11:14:12,315 INFO L226 Difference]: Without dead ends: 705 [2020-09-25 11:14:12,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2020-09-25 11:14:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-09-25 11:14:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 684. [2020-09-25 11:14:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-09-25 11:14:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 809 transitions. [2020-09-25 11:14:12,350 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 809 transitions. Word has length 152 [2020-09-25 11:14:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:12,351 INFO L479 AbstractCegarLoop]: Abstraction has 684 states and 809 transitions. [2020-09-25 11:14:12,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 11:14:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 809 transitions. [2020-09-25 11:14:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 11:14:12,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:12,355 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] [2020-09-25 11:14:12,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:14:12,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:12,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1561438327, now seen corresponding path program 1 times [2020-09-25 11:14:12,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:12,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925840009] [2020-09-25 11:14:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:13,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:15,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:16,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:17,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:17,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-25 11:14:17,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:14:17,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:14:17,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:17,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:14:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 11:14:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 11:14:17,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:17,944 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-09-25 11:14:18,075 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-09-25 11:14:18,240 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-09-25 11:14:18,395 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-09-25 11:14:18,659 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-09-25 11:14:18,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:18,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:18,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:18,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:18,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 11:14:18,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:18,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:14:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:18,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:18,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:18,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:18,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 11:14:18,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:14:18,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-25 11:14:18,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:18,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:18,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:14:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 11:14:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:14:19,163 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 11:14:19,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925840009] [2020-09-25 11:14:19,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:19,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 11:14:19,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335207938] [2020-09-25 11:14:19,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 11:14:19,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 11:14:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 11:14:19,165 INFO L87 Difference]: Start difference. First operand 684 states and 809 transitions. Second operand 20 states. [2020-09-25 11:14:20,207 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-25 11:14:20,391 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 11:14:20,670 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-25 11:14:20,981 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-25 11:14:21,308 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-09-25 11:14:21,901 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-09-25 11:14:22,278 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2020-09-25 11:14:22,444 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-09-25 11:14:23,326 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-25 11:14:23,715 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-09-25 11:14:24,026 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-09-25 11:14:24,537 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-09-25 11:14:24,740 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-09-25 11:14:25,566 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-25 11:14:25,892 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-25 11:14:26,411 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-09-25 11:14:27,178 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-25 11:14:27,434 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-25 11:14:28,347 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-09-25 11:14:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:29,536 INFO L93 Difference]: Finished difference Result 2205 states and 2811 transitions. [2020-09-25 11:14:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 11:14:29,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 153 [2020-09-25 11:14:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:29,550 INFO L225 Difference]: With dead ends: 2205 [2020-09-25 11:14:29,550 INFO L226 Difference]: Without dead ends: 1545 [2020-09-25 11:14:29,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 11:14:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-09-25 11:14:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1282. [2020-09-25 11:14:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-09-25 11:14:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1520 transitions. [2020-09-25 11:14:29,619 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1520 transitions. Word has length 153 [2020-09-25 11:14:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:29,621 INFO L479 AbstractCegarLoop]: Abstraction has 1282 states and 1520 transitions. [2020-09-25 11:14:29,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 11:14:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1520 transitions. [2020-09-25 11:14:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-25 11:14:29,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:29,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:29,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:14:29,629 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1703696038, now seen corresponding path program 1 times [2020-09-25 11:14:29,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:29,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869850686] [2020-09-25 11:14:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:29,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:29,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:30,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:31,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:31,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:32,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:33,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:34,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-25 11:14:34,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 11:14:34,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 11:14:34,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:34,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:34,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:14:34,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:14:34,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-09-25 11:14:34,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:34,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:34,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:34,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:34,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 11:14:34,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:34,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:14:34,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:34,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:34,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:14:34,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:34,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 11:14:34,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:34,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:34,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:14:34,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 11:14:34,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 11:14:35,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869850686] [2020-09-25 11:14:35,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:35,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:14:35,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304231895] [2020-09-25 11:14:35,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:14:35,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:35,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:14:35,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:14:35,071 INFO L87 Difference]: Start difference. First operand 1282 states and 1520 transitions. Second operand 6 states. [2020-09-25 11:14:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:37,006 INFO L93 Difference]: Finished difference Result 3585 states and 4438 transitions. [2020-09-25 11:14:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:14:37,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-09-25 11:14:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:37,024 INFO L225 Difference]: With dead ends: 3585 [2020-09-25 11:14:37,024 INFO L226 Difference]: Without dead ends: 2327 [2020-09-25 11:14:37,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 11:14:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2020-09-25 11:14:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2178. [2020-09-25 11:14:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-09-25 11:14:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 2634 transitions. [2020-09-25 11:14:37,124 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 2634 transitions. Word has length 160 [2020-09-25 11:14:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:37,125 INFO L479 AbstractCegarLoop]: Abstraction has 2178 states and 2634 transitions. [2020-09-25 11:14:37,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:14:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 2634 transitions. [2020-09-25 11:14:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-25 11:14:37,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:37,135 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:37,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:14:37,135 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:37,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:37,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2020064762, now seen corresponding path program 1 times [2020-09-25 11:14:37,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:37,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956016316] [2020-09-25 11:14:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:38,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:38,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:38,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking...