/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:29:03,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:29:03,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:29:03,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:29:03,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:29:03,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:29:03,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:29:03,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:29:03,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:29:03,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:29:03,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:29:03,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:29:03,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:29:03,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:29:03,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:29:03,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:29:03,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:29:03,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:29:03,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:29:03,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:29:03,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:29:03,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:29:03,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:29:03,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:29:03,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:29:03,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:29:03,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:29:03,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:29:03,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:29:03,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:29:03,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:29:03,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:29:03,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:29:03,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:29:03,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:29:03,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:29:03,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:29:03,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:29:03,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:29:03,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:29:03,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:29:03,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 13:29:03,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:29:03,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:29:03,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:29:03,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:29:03,237 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:29:03,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:29:03,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:29:03,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:29:03,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:29:03,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:29:03,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:29:03,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:29:03,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:29:03,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:29:03,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:29:03,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:29:03,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:29:03,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:29:03,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:29:03,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:29:03,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:29:03,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:29:03,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:29:03,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:29:03,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:29:03,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:29:03,727 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:29:03,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:29:03,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:29:03,733 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:29:03,735 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-25 13:29:03,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9083c03a/c4785f900ecb4b63a447268b5ca32a99/FLAGddff36720 [2020-09-25 13:29:04,527 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:29:04,528 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2020-09-25 13:29:04,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9083c03a/c4785f900ecb4b63a447268b5ca32a99/FLAGddff36720 [2020-09-25 13:29:04,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9083c03a/c4785f900ecb4b63a447268b5ca32a99 [2020-09-25 13:29:04,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:29:04,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:29:04,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:29:04,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:29:04,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:29:04,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:29:04" (1/1) ... [2020-09-25 13:29:04,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:04, skipping insertion in model container [2020-09-25 13:29:04,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:29:04" (1/1) ... [2020-09-25 13:29:04,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:29:04,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:29:05,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:29:05,449 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:29:05,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:29:05,639 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:29:05,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05 WrapperNode [2020-09-25 13:29:05,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:29:05,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:29:05,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:29:05,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:29:05,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... [2020-09-25 13:29:05,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:29:05,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:29:05,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:29:05,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:29:05,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:29:05,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:29:05,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:29:05,836 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 13:29:05,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:29:05,836 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 13:29:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:29:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 13:29:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 13:29:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:29:05,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:29:05,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:29:07,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:29:07,185 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 13:29:07,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:29:07 BoogieIcfgContainer [2020-09-25 13:29:07,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:29:07,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:29:07,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:29:07,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:29:07,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:29:04" (1/3) ... [2020-09-25 13:29:07,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42400975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:29:07, skipping insertion in model container [2020-09-25 13:29:07,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:29:05" (2/3) ... [2020-09-25 13:29:07,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42400975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:29:07, skipping insertion in model container [2020-09-25 13:29:07,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:29:07" (3/3) ... [2020-09-25 13:29:07,205 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2020-09-25 13:29:07,216 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:29:07,228 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:29:07,250 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:29:07,285 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:29:07,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:29:07,286 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:29:07,286 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:29:07,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:29:07,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:29:07,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:29:07,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:29:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 13:29:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-09-25 13:29:07,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:07,343 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] [2020-09-25 13:29:07,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:07,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1930932209, now seen corresponding path program 1 times [2020-09-25 13:29:07,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:07,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177362223] [2020-09-25 13:29:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:07,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:08,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:09,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:10,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:12,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-25 13:29:12,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:29:12,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 13:29:12,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:12,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:12,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 13:29:12,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 13:29:12,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-09-25 13:29:12,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 13:29:12,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:12,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:12,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:12,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:12,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:12,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 13:29:12,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:12,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:12,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:12,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 13:29:12,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:13,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177362223] [2020-09-25 13:29:13,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:29:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:29:13,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761025504] [2020-09-25 13:29:13,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:29:13,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:29:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:29:13,082 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 13:29:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:15,303 INFO L93 Difference]: Finished difference Result 1340 states and 1738 transitions. [2020-09-25 13:29:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 13:29:15,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-09-25 13:29:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:15,334 INFO L225 Difference]: With dead ends: 1340 [2020-09-25 13:29:15,334 INFO L226 Difference]: Without dead ends: 741 [2020-09-25 13:29:15,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-25 13:29:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 664. [2020-09-25 13:29:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-25 13:29:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 780 transitions. [2020-09-25 13:29:15,462 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 780 transitions. Word has length 144 [2020-09-25 13:29:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:15,464 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 780 transitions. [2020-09-25 13:29:15,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:29:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 780 transitions. [2020-09-25 13:29:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-25 13:29:15,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:15,473 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] [2020-09-25 13:29:15,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:29:15,474 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:15,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:15,474 INFO L82 PathProgramCache]: Analyzing trace with hash -838420896, now seen corresponding path program 1 times [2020-09-25 13:29:15,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:15,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343823334] [2020-09-25 13:29:15,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:15,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:16,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:17,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:20,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:20,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-25 13:29:20,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 13:29:20,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-25 13:29:20,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:20,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 13:29:20,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 13:29:20,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 13:29:20,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:20,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:20,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:20,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:20,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:29:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:20,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:20,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:20,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:20,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:20,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:21,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:21,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 13:29:21,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:21,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 13:29:21,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:21,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:21,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 13:29:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 13:29:21,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:21,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343823334] [2020-09-25 13:29:21,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:21,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 13:29:21,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816925195] [2020-09-25 13:29:21,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 13:29:21,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 13:29:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 13:29:21,244 INFO L87 Difference]: Start difference. First operand 664 states and 780 transitions. Second operand 9 states. [2020-09-25 13:29:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:26,073 INFO L93 Difference]: Finished difference Result 2035 states and 2630 transitions. [2020-09-25 13:29:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 13:29:26,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 165 [2020-09-25 13:29:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:26,092 INFO L225 Difference]: With dead ends: 2035 [2020-09-25 13:29:26,092 INFO L226 Difference]: Without dead ends: 1100 [2020-09-25 13:29:26,102 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 13:29:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-09-25 13:29:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1064. [2020-09-25 13:29:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-25 13:29:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1200 transitions. [2020-09-25 13:29:26,165 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1200 transitions. Word has length 165 [2020-09-25 13:29:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:26,165 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1200 transitions. [2020-09-25 13:29:26,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 13:29:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1200 transitions. [2020-09-25 13:29:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-25 13:29:26,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:26,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:29:26,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:29:26,172 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -289310937, now seen corresponding path program 1 times [2020-09-25 13:29:26,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:26,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2558152] [2020-09-25 13:29:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:26,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:26,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:26,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:28,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:31,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-25 13:29:31,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 13:29:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 13:29:31,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:31,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:31,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-25 13:29:31,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 13:29:31,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:31,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:31,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:31,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:31,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:31,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 13:29:31,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:31,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:31,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:31,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:31,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:31,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:31,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 13:29:31,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 13:29:31,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:31,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 13:29:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:31,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2558152] [2020-09-25 13:29:31,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:31,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:29:31,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113582580] [2020-09-25 13:29:31,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:31,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:31,544 INFO L87 Difference]: Start difference. First operand 1064 states and 1200 transitions. Second operand 5 states. [2020-09-25 13:29:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:33,607 INFO L93 Difference]: Finished difference Result 2435 states and 2832 transitions. [2020-09-25 13:29:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:29:33,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-09-25 13:29:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:33,624 INFO L225 Difference]: With dead ends: 2435 [2020-09-25 13:29:33,625 INFO L226 Difference]: Without dead ends: 1240 [2020-09-25 13:29:33,631 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 13:29:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-25 13:29:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1193. [2020-09-25 13:29:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1193 states. [2020-09-25 13:29:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1358 transitions. [2020-09-25 13:29:33,695 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1358 transitions. Word has length 170 [2020-09-25 13:29:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:33,697 INFO L479 AbstractCegarLoop]: Abstraction has 1193 states and 1358 transitions. [2020-09-25 13:29:33,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1358 transitions. [2020-09-25 13:29:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 13:29:33,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:33,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:29:33,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 13:29:33,716 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:33,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:33,717 INFO L82 PathProgramCache]: Analyzing trace with hash -64061830, now seen corresponding path program 1 times [2020-09-25 13:29:33,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:33,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530271231] [2020-09-25 13:29:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:34,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:34,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:35,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:38,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:38,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-09-25 13:29:38,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 13:29:38,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 13:29:38,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:38,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-09-25 13:29:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-25 13:29:38,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:38,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:39,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:39,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:39,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:39,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:29:39,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:39,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:39,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:39,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:39,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:39,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:39,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:39,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:39,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 13:29:39,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:39,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 13:29:39,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:39,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:39,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:39,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 13:29:39,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 13:29:39,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530271231] [2020-09-25 13:29:39,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:39,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:29:39,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382226146] [2020-09-25 13:29:39,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:39,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:39,201 INFO L87 Difference]: Start difference. First operand 1193 states and 1358 transitions. Second operand 5 states. [2020-09-25 13:29:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:41,013 INFO L93 Difference]: Finished difference Result 3002 states and 3516 transitions. [2020-09-25 13:29:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:29:41,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 13:29:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:41,028 INFO L225 Difference]: With dead ends: 3002 [2020-09-25 13:29:41,029 INFO L226 Difference]: Without dead ends: 1833 [2020-09-25 13:29:41,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:29:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2020-09-25 13:29:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1487. [2020-09-25 13:29:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1487 states. [2020-09-25 13:29:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1737 transitions. [2020-09-25 13:29:41,085 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1737 transitions. Word has length 191 [2020-09-25 13:29:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:41,086 INFO L479 AbstractCegarLoop]: Abstraction has 1487 states and 1737 transitions. [2020-09-25 13:29:41,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1737 transitions. [2020-09-25 13:29:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-25 13:29:41,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:41,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 13:29:41,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 13:29:41,095 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -656669948, now seen corresponding path program 1 times [2020-09-25 13:29:41,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:41,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404159653] [2020-09-25 13:29:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:41,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:41,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:41,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:42,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:44,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:44,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:46,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-09-25 13:29:46,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 13:29:46,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 13:29:46,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:46,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 13:29:46,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-09-25 13:29:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 13:29:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:46,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:29:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:46,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:46,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:46,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:46,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 13:29:46,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:46,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:46,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 13:29:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:46,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:46,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 13:29:46,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 13:29:46,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:46,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:29:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:29:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:46,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 13:29:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:46,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:29:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 13:29:46,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:29:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 13:29:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:29:46,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:29:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 13:29:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:29:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 13:29:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:29:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 13:29:46,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404159653] [2020-09-25 13:29:46,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 13:29:46,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 13:29:46,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710547613] [2020-09-25 13:29:46,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 13:29:46,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:29:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 13:29:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 13:29:46,624 INFO L87 Difference]: Start difference. First operand 1487 states and 1737 transitions. Second operand 5 states. [2020-09-25 13:29:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:29:48,413 INFO L93 Difference]: Finished difference Result 4016 states and 4842 transitions. [2020-09-25 13:29:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 13:29:48,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 203 [2020-09-25 13:29:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:29:48,437 INFO L225 Difference]: With dead ends: 4016 [2020-09-25 13:29:48,438 INFO L226 Difference]: Without dead ends: 2553 [2020-09-25 13:29:48,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 13:29:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2020-09-25 13:29:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2488. [2020-09-25 13:29:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2488 states. [2020-09-25 13:29:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 2927 transitions. [2020-09-25 13:29:48,515 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 2927 transitions. Word has length 203 [2020-09-25 13:29:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:29:48,516 INFO L479 AbstractCegarLoop]: Abstraction has 2488 states and 2927 transitions. [2020-09-25 13:29:48,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 13:29:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 2927 transitions. [2020-09-25 13:29:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-09-25 13:29:48,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:29:48,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 13:29:48,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 13:29:48,527 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:29:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:29:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2020431771, now seen corresponding path program 1 times [2020-09-25 13:29:48,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:29:48,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377516444] [2020-09-25 13:29:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:29:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:29:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:48,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:49,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:29:51,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking...