/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:14:19,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:14:19,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:14:19,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:14:19,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:14:19,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:14:19,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:14:19,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:14:19,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:14:19,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:14:19,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:14:19,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:14:19,584 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:14:19,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:14:19,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:14:19,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:14:19,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:14:19,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:14:19,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:14:19,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:14:19,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:14:19,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:14:19,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:14:19,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:14:19,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:14:19,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:14:19,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:14:19,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:14:19,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:14:19,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:14:19,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:14:19,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:14:19,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:14:19,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:14:19,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:14:19,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:14:19,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:14:19,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:14:19,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:14:19,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:14:19,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:14:19,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:14:19,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:14:19,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:14:19,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:14:19,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:14:19,671 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:14:19,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:14:19,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:14:19,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:14:19,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:14:19,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:14:19,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:14:19,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:14:19,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:14:19,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:14:19,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:14:19,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:14:19,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:14:19,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:14:19,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:14:19,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:14:19,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:14:19,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:19,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:14:19,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:14:19,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:14:19,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:14:19,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:14:19,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:14:19,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:14:19,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:14:20,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:14:20,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:14:20,189 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:14:20,191 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:14:20,192 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:14:20,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label42.c [2020-09-25 11:14:20,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f36d6d23/61f4e0cdd359403389249227239107df/FLAGf485c7613 [2020-09-25 11:14:20,945 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:14:20,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label42.c [2020-09-25 11:14:20,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f36d6d23/61f4e0cdd359403389249227239107df/FLAGf485c7613 [2020-09-25 11:14:21,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f36d6d23/61f4e0cdd359403389249227239107df [2020-09-25 11:14:21,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:14:21,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:14:21,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:21,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:14:21,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:14:21,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:21,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe12ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21, skipping insertion in model container [2020-09-25 11:14:21,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:21,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:14:21,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:14:21,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:21,780 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:14:21,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:14:21,998 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:14:21,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21 WrapperNode [2020-09-25 11:14:21,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:14:22,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:14:22,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:14:22,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:14:22,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... [2020-09-25 11:14:22,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:14:22,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:14:22,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:14:22,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:14:22,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:14:22,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:14:22,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:14:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:14:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:14:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:14:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:14:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:14:22,207 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:14:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:14:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:14:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:14:23,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:14:23,608 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:14:23,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:23 BoogieIcfgContainer [2020-09-25 11:14:23,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:14:23,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:14:23,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:14:23,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:14:23,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:14:21" (1/3) ... [2020-09-25 11:14:23,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1df6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:23, skipping insertion in model container [2020-09-25 11:14:23,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:14:21" (2/3) ... [2020-09-25 11:14:23,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1df6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:14:23, skipping insertion in model container [2020-09-25 11:14:23,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:14:23" (3/3) ... [2020-09-25 11:14:23,628 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2020-09-25 11:14:23,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:14:23,652 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:14:23,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:14:23,710 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:14:23,710 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:14:23,710 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:14:23,711 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:14:23,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:14:23,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:14:23,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:14:23,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:14:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:14:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-09-25 11:14:23,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:23,767 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] [2020-09-25 11:14:23,768 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 907543029, now seen corresponding path program 1 times [2020-09-25 11:14:23,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:23,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304694061] [2020-09-25 11:14:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:24,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:24,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:25,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:25,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:28,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:29,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:29,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-09-25 11:14:29,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:29,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-09-25 11:14:29,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:29,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:14:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 11:14:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-25 11:14:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:14:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:29,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:29,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:29,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:29,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 11:14:29,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:29,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:29,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 11:14:29,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:14:29,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304694061] [2020-09-25 11:14:29,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:14:29,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 11:14:29,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311974737] [2020-09-25 11:14:29,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:14:29,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:14:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:29,567 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 5 states. [2020-09-25 11:14:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:32,354 INFO L93 Difference]: Finished difference Result 1360 states and 1895 transitions. [2020-09-25 11:14:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:14:32,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-09-25 11:14:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:32,399 INFO L225 Difference]: With dead ends: 1360 [2020-09-25 11:14:32,399 INFO L226 Difference]: Without dead ends: 781 [2020-09-25 11:14:32,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:14:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-09-25 11:14:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 746. [2020-09-25 11:14:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-09-25 11:14:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 914 transitions. [2020-09-25 11:14:32,526 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 914 transitions. Word has length 143 [2020-09-25 11:14:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:32,528 INFO L479 AbstractCegarLoop]: Abstraction has 746 states and 914 transitions. [2020-09-25 11:14:32,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:14:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 914 transitions. [2020-09-25 11:14:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-25 11:14:32,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:32,540 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] [2020-09-25 11:14:32,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:14:32,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:32,541 INFO L82 PathProgramCache]: Analyzing trace with hash -581235324, now seen corresponding path program 1 times [2020-09-25 11:14:32,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:32,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375609835] [2020-09-25 11:14:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:32,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:32,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:33,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:33,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:36,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:37,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:37,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-09-25 11:14:37,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:14:37,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 11:14:37,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:37,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:14:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 11:14:37,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 11:14:37,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:38,143 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-09-25 11:14:38,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:38,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:38,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:38,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:38,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 11:14:38,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:38,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:38,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:38,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:38,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:38,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:38,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:38,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:14:38,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:38,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 11:14:38,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:38,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:38,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:14:38,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:38,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:14:38,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:38,534 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 11:14:38,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375609835] [2020-09-25 11:14:38,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:38,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:14:38,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958706924] [2020-09-25 11:14:38,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:14:38,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:38,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:14:38,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:14:38,539 INFO L87 Difference]: Start difference. First operand 746 states and 914 transitions. Second operand 9 states. [2020-09-25 11:14:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:43,641 INFO L93 Difference]: Finished difference Result 2047 states and 2680 transitions. [2020-09-25 11:14:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 11:14:43,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 164 [2020-09-25 11:14:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:43,653 INFO L225 Difference]: With dead ends: 2047 [2020-09-25 11:14:43,654 INFO L226 Difference]: Without dead ends: 1030 [2020-09-25 11:14:43,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:14:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-09-25 11:14:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1003. [2020-09-25 11:14:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-09-25 11:14:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1169 transitions. [2020-09-25 11:14:43,720 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1169 transitions. Word has length 164 [2020-09-25 11:14:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:43,721 INFO L479 AbstractCegarLoop]: Abstraction has 1003 states and 1169 transitions. [2020-09-25 11:14:43,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:14:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1169 transitions. [2020-09-25 11:14:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-25 11:14:43,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:43,726 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] [2020-09-25 11:14:43,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:14:43,727 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1195548531, now seen corresponding path program 1 times [2020-09-25 11:14:43,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:43,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543161987] [2020-09-25 11:14:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:44,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:48,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-25 11:14:48,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:14:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 11:14:48,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:48,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:48,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:48,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-09-25 11:14:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-25 11:14:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:48,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:48,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:48,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:48,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:48,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 11:14:48,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:48,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:48,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:48,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:48,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:48,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:48,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:49,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:49,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:14:49,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:49,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 11:14:49,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:49,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:49,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:49,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:14:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:49,046 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 11:14:49,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543161987] [2020-09-25 11:14:49,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:49,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:14:49,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891861801] [2020-09-25 11:14:49,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:14:49,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:49,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:14:49,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:49,051 INFO L87 Difference]: Start difference. First operand 1003 states and 1169 transitions. Second operand 5 states. [2020-09-25 11:14:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:50,945 INFO L93 Difference]: Finished difference Result 2467 states and 2981 transitions. [2020-09-25 11:14:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:14:50,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-09-25 11:14:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:50,957 INFO L225 Difference]: With dead ends: 2467 [2020-09-25 11:14:50,964 INFO L226 Difference]: Without dead ends: 1488 [2020-09-25 11:14:50,972 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 11:14:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2020-09-25 11:14:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1291. [2020-09-25 11:14:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1291 states. [2020-09-25 11:14:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1537 transitions. [2020-09-25 11:14:51,043 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1537 transitions. Word has length 168 [2020-09-25 11:14:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:51,046 INFO L479 AbstractCegarLoop]: Abstraction has 1291 states and 1537 transitions. [2020-09-25 11:14:51,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:14:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1537 transitions. [2020-09-25 11:14:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 11:14:51,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:51,057 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:14:51,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:14:51,058 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash -390929757, now seen corresponding path program 1 times [2020-09-25 11:14:51,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:51,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553069400] [2020-09-25 11:14:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:51,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:51,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:51,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:52,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:53,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:54,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:56,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:56,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-09-25 11:14:56,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:14:56,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 11:14:56,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:56,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:56,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 11:14:56,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-09-25 11:14:56,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 11:14:56,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:56,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:56,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:56,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:56,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:56,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:56,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:14:56,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:56,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:56,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:56,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:56,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:14:56,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:56,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:56,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:56,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 11:14:56,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:14:56,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:56,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:56,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:56,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:56,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:14:56,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 11:14:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:56,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:56,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:56,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 11:14:56,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-25 11:14:56,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:56,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 11:14:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:56,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 11:14:56,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:14:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 11:14:57,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553069400] [2020-09-25 11:14:57,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:57,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 11:14:57,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306999817] [2020-09-25 11:14:57,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 11:14:57,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:57,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 11:14:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-25 11:14:57,160 INFO L87 Difference]: Start difference. First operand 1291 states and 1537 transitions. Second operand 16 states. [2020-09-25 11:14:59,180 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-09-25 11:15:00,158 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-09-25 11:15:00,880 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-09-25 11:15:01,504 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2020-09-25 11:15:01,969 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-09-25 11:15:02,827 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2020-09-25 11:15:03,304 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2020-09-25 11:15:03,581 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-25 11:15:03,806 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-25 11:15:04,394 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-09-25 11:15:04,723 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-09-25 11:15:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:05,793 INFO L93 Difference]: Finished difference Result 3288 states and 4088 transitions. [2020-09-25 11:15:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 11:15:05,794 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 209 [2020-09-25 11:15:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:05,805 INFO L225 Difference]: With dead ends: 3288 [2020-09-25 11:15:05,805 INFO L226 Difference]: Without dead ends: 2021 [2020-09-25 11:15:05,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=482, Invalid=1078, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 11:15:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2020-09-25 11:15:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1817. [2020-09-25 11:15:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2020-09-25 11:15:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2150 transitions. [2020-09-25 11:15:05,870 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2150 transitions. Word has length 209 [2020-09-25 11:15:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:05,870 INFO L479 AbstractCegarLoop]: Abstraction has 1817 states and 2150 transitions. [2020-09-25 11:15:05,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 11:15:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2150 transitions. [2020-09-25 11:15:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-25 11:15:05,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:05,881 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:15:05,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:15:05,881 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1442389095, now seen corresponding path program 1 times [2020-09-25 11:15:05,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:05,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806952361] [2020-09-25 11:15:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:06,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking...