/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:37:29,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:37:29,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:37:29,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:37:29,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:37:29,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:37:29,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:37:29,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:37:29,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:37:29,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:37:29,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:37:29,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:37:29,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:37:29,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:37:29,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:37:29,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:37:29,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:37:29,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:37:29,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:37:29,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:37:29,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:37:29,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:37:29,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:37:29,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:37:29,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:37:29,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:37:29,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:37:29,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:37:29,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:37:29,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:37:29,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:37:29,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:37:29,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:37:29,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:37:29,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:37:29,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:37:29,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:37:29,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:37:29,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:37:29,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:37:29,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:37:29,149 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 14:37:29,190 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:37:29,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:37:29,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:37:29,192 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:37:29,192 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:37:29,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:37:29,193 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:37:29,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:37:29,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:37:29,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:37:29,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:37:29,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:37:29,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:37:29,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:37:29,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:37:29,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:37:29,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:37:29,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:37:29,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:37:29,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:37:29,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:37:29,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:37:29,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:37:29,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:37:29,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:37:29,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:37:29,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:37:29,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:37:29,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:37:29,198 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 14:37:29,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:37:29,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:37:29,685 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:37:29,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:37:29,688 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:37:29,689 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 14:37:29,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aea840f0f/7aee6321f6eb49eab3abdb5a4b142b6a/FLAG1f600580e [2020-09-25 14:37:30,475 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:37:30,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 14:37:30,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aea840f0f/7aee6321f6eb49eab3abdb5a4b142b6a/FLAG1f600580e [2020-09-25 14:37:30,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aea840f0f/7aee6321f6eb49eab3abdb5a4b142b6a [2020-09-25 14:37:30,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:37:30,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:37:30,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:37:30,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:37:30,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:37:30,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:37:30" (1/1) ... [2020-09-25 14:37:30,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3225ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:30, skipping insertion in model container [2020-09-25 14:37:30,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:37:30" (1/1) ... [2020-09-25 14:37:30,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:37:30,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:37:31,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:37:31,224 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:37:31,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:37:31,514 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:37:31,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31 WrapperNode [2020-09-25 14:37:31,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:37:31,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:37:31,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:37:31,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:37:31,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (1/1) ... [2020-09-25 14:37:31,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:37:31,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:37:31,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:37:31,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:37:31,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (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 14:37:31,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:37:31,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:37:31,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:37:31,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:37:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:37:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:37:31,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:37:31,763 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:37:31,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:37:31,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:37:31,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:37:33,187 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:37:33,188 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:37:33,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:37:33 BoogieIcfgContainer [2020-09-25 14:37:33,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:37:33,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:37:33,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:37:33,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:37:33,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:37:30" (1/3) ... [2020-09-25 14:37:33,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:37:33, skipping insertion in model container [2020-09-25 14:37:33,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:37:31" (2/3) ... [2020-09-25 14:37:33,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df4b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:37:33, skipping insertion in model container [2020-09-25 14:37:33,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:37:33" (3/3) ... [2020-09-25 14:37:33,207 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label43.c [2020-09-25 14:37:33,219 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:37:33,230 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:37:33,254 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:37:33,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:37:33,291 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:37:33,291 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:37:33,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:37:33,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:37:33,292 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:37:33,292 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:37:33,292 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:37:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 14:37:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 14:37:33,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:33,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:37:33,349 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1333625535, now seen corresponding path program 1 times [2020-09-25 14:37:33,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:33,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96473516] [2020-09-25 14:37:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:34,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:35,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:36,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:38,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:38,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 14:37:38,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 14:37:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 14:37:38,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:38,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:38,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:37:38,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 14:37:38,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 14:37:38,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 14:37:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:37:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:39,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:39,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:39,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:37:39,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:39,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 14:37:39,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:39,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:39,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:37:39,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:39,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:37:39,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:39,187 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 14:37:39,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96473516] [2020-09-25 14:37:39,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:37:39,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:37:39,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639678542] [2020-09-25 14:37:39,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:37:39,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:37:39,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:37:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:37:39,231 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-25 14:37:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:37:42,322 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-25 14:37:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 14:37:42,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-09-25 14:37:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:37:42,354 INFO L225 Difference]: With dead ends: 1360 [2020-09-25 14:37:42,354 INFO L226 Difference]: Without dead ends: 781 [2020-09-25 14:37:42,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:37:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-25 14:37:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-25 14:37:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-25 14:37:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-25 14:37:42,491 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 156 [2020-09-25 14:37:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:37:42,492 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-25 14:37:42,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:37:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-25 14:37:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-09-25 14:37:42,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:42,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:37:42,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:37:42,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2141714320, now seen corresponding path program 1 times [2020-09-25 14:37:42,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:42,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033222664] [2020-09-25 14:37:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:42,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:42,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:43,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:43,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:47,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:47,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 14:37:47,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 14:37:47,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 14:37:47,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:47,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:37:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 14:37:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 14:37:47,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:37:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:47,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:47,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:47,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:37:47,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:47,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:37:47,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:47,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:47,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:37:47,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:47,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:37:47,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:37:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:47,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:47,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:48,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 14:37:48,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 14:37:48,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:48,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:37:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:48,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 14:37:48,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:37:48,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033222664] [2020-09-25 14:37:48,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:37:48,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 14:37:48,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165015079] [2020-09-25 14:37:48,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:37:48,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:37:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:37:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:37:48,195 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 9 states. [2020-09-25 14:37:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:37:52,973 INFO L93 Difference]: Finished difference Result 2047 states and 2680 transitions. [2020-09-25 14:37:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 14:37:52,974 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2020-09-25 14:37:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:37:52,989 INFO L225 Difference]: With dead ends: 2047 [2020-09-25 14:37:52,989 INFO L226 Difference]: Without dead ends: 1030 [2020-09-25 14:37:52,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 14:37:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-09-25 14:37:53,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1003. [2020-09-25 14:37:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-09-25 14:37:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1169 transitions. [2020-09-25 14:37:53,049 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1169 transitions. Word has length 177 [2020-09-25 14:37:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:37:53,050 INFO L479 AbstractCegarLoop]: Abstraction has 1003 states and 1169 transitions. [2020-09-25 14:37:53,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:37:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1169 transitions. [2020-09-25 14:37:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-25 14:37:53,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:37:53,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:37:53,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:37:53,055 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:37:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:37:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1934583001, now seen corresponding path program 1 times [2020-09-25 14:37:53,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:37:53,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386751474] [2020-09-25 14:37:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:37:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:53,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:53,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:53,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:53,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:54,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:54,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:56,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:56,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:57,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:58,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:58,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-25 14:37:58,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 14:37:58,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 14:37:58,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:58,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:37:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 14:37:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 14:37:58,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:58,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:37:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:58,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:58,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:37:58,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:58,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:37:58,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:58,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:58,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:37:58,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:58,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:37:58,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:37:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:37:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:37:58,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:37:58,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 14:37:58,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:37:58,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 14:37:58,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:37:58,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:37:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:37:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:37:58,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 14:37:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:37:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:37:58,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386751474] [2020-09-25 14:37:58,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:37:58,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:37:58,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963278218] [2020-09-25 14:37:58,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:37:58,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:37:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:37:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:37:58,365 INFO L87 Difference]: Start difference. First operand 1003 states and 1169 transitions. Second operand 5 states. [2020-09-25 14:38:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:00,537 INFO L93 Difference]: Finished difference Result 2656 states and 3198 transitions. [2020-09-25 14:38:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:38:00,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-09-25 14:38:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:00,563 INFO L225 Difference]: With dead ends: 2656 [2020-09-25 14:38:00,563 INFO L226 Difference]: Without dead ends: 1518 [2020-09-25 14:38:00,569 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 14:38:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2020-09-25 14:38:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1277. [2020-09-25 14:38:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1277 states. [2020-09-25 14:38:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1519 transitions. [2020-09-25 14:38:00,631 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1519 transitions. Word has length 181 [2020-09-25 14:38:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:00,632 INFO L479 AbstractCegarLoop]: Abstraction has 1277 states and 1519 transitions. [2020-09-25 14:38:00,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:38:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1519 transitions. [2020-09-25 14:38:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-25 14:38:00,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:00,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:38:00,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:38:00,643 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash -718562673, now seen corresponding path program 1 times [2020-09-25 14:38:00,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:00,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628473440] [2020-09-25 14:38:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:38:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:00,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:00,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:03,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:04,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:04,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:04,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:05,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:05,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:05,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-09-25 14:38:05,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 14:38:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:38:05,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:05,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 14:38:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 14:38:05,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-09-25 14:38:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:38:06,201 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-09-25 14:38:06,397 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-09-25 14:38:06,594 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2020-09-25 14:38:06,780 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 42 [2020-09-25 14:38:06,927 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-09-25 14:38:07,070 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 34 [2020-09-25 14:38:07,209 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-09-25 14:38:07,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:38:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:07,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:07,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:38:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 14:38:07,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:38:07,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 14:38:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:38:07,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:38:07,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:38:07,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:38:07,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:38:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:38:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:38:07,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628473440] [2020-09-25 14:38:07,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:38:07,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 14:38:07,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234282189] [2020-09-25 14:38:07,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 14:38:07,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:38:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 14:38:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-09-25 14:38:07,848 INFO L87 Difference]: Start difference. First operand 1277 states and 1519 transitions. Second operand 20 states. [2020-09-25 14:38:09,081 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-09-25 14:38:09,356 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-09-25 14:38:10,570 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2020-09-25 14:38:11,591 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2020-09-25 14:38:12,930 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 108 [2020-09-25 14:38:13,639 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2020-09-25 14:38:14,188 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 14:38:15,222 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 100 [2020-09-25 14:38:15,541 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-09-25 14:38:16,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-25 14:38:17,007 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-09-25 14:38:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:38:19,765 INFO L93 Difference]: Finished difference Result 3891 states and 4865 transitions. [2020-09-25 14:38:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 14:38:19,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 184 [2020-09-25 14:38:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:38:19,784 INFO L225 Difference]: With dead ends: 3891 [2020-09-25 14:38:19,784 INFO L226 Difference]: Without dead ends: 2638 [2020-09-25 14:38:19,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 14:38:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2020-09-25 14:38:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2093. [2020-09-25 14:38:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2093 states. [2020-09-25 14:38:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2475 transitions. [2020-09-25 14:38:19,879 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2475 transitions. Word has length 184 [2020-09-25 14:38:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:38:19,880 INFO L479 AbstractCegarLoop]: Abstraction has 2093 states and 2475 transitions. [2020-09-25 14:38:19,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 14:38:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2475 transitions. [2020-09-25 14:38:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-09-25 14:38:19,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:38:19,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-09-25 14:38:19,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:38:19,891 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:38:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:38:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash 89448820, now seen corresponding path program 1 times [2020-09-25 14:38:19,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:38:19,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419981033] [2020-09-25 14:38:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY