/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=SMALLEST --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/Problem10_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:24:52,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:24:53,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:24:53,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:24:53,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:24:53,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:24:53,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:24:53,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:24:53,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:24:53,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:24:53,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:24:53,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:24:53,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:24:53,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:24:53,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:24:53,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:24:53,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:24:53,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:24:53,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:24:53,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:24:53,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:24:53,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:24:53,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:24:53,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:24:53,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:24:53,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:24:53,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:24:53,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:24:53,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:24:53,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:24:53,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:24:53,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:24:53,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:24:53,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:24:53,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:24:53,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:24:53,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:24:53,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:24:53,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:24:53,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:24:53,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:24:53,087 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 [2020-09-24 18:24:53,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:24:53,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:24:53,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:24:53,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:24:53,140 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:24:53,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:24:53,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:24:53,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:24:53,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:24:53,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:24:53,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:24:53,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:24:53,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:24:53,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:24:53,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:24:53,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:24:53,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:24:53,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:24:53,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:24:53,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:24:53,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:24:53,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:24:53,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:24:53,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:24:53,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:24:53,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:24:53,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:24:53,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:24:53,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:24:53,146 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:24:53,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:24:53,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:24:53,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:24:53,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:24:53,659 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:24:53,661 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-09-24 18:24:53,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e2335e6e/54b21b8b3bf84c8bb0651080fa1059fe/FLAGe37fc5804 [2020-09-24 18:24:54,356 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:24:54,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label32.c [2020-09-24 18:24:54,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e2335e6e/54b21b8b3bf84c8bb0651080fa1059fe/FLAGe37fc5804 [2020-09-24 18:24:54,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e2335e6e/54b21b8b3bf84c8bb0651080fa1059fe [2020-09-24 18:24:54,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:24:54,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:24:54,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:24:54,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:24:54,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:24:54,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:24:54" (1/1) ... [2020-09-24 18:24:54,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc1b413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:54, skipping insertion in model container [2020-09-24 18:24:54,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:24:54" (1/1) ... [2020-09-24 18:24:54,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:24:54,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:24:55,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:24:55,315 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:24:55,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:24:55,426 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:24:55,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55 WrapperNode [2020-09-24 18:24:55,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:24:55,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:24:55,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:24:55,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:24:55,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (1/1) ... [2020-09-24 18:24:55,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:24:55,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:24:55,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:24:55,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:24:55,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (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 [2020-09-24 18:24:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:24:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:24:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 18:24:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:24:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 18:24:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:24:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:24:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 18:24:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:24:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:24:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:24:57,046 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:24:57,047 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 18:24:57,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:24:57 BoogieIcfgContainer [2020-09-24 18:24:57,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:24:57,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:24:57,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:24:57,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:24:57,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:24:54" (1/3) ... [2020-09-24 18:24:57,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed7552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:24:57, skipping insertion in model container [2020-09-24 18:24:57,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:24:55" (2/3) ... [2020-09-24 18:24:57,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ed7552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:24:57, skipping insertion in model container [2020-09-24 18:24:57,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:24:57" (3/3) ... [2020-09-24 18:24:57,066 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label32.c [2020-09-24 18:24:57,078 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:24:57,089 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:24:57,111 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:24:57,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:24:57,149 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:24:57,149 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:24:57,149 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:24:57,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:24:57,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:24:57,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:24:57,150 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:24:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 18:24:57,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 18:24:57,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:24:57,194 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] [2020-09-24 18:24:57,195 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:24:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:24:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1927363665, now seen corresponding path program 1 times [2020-09-24 18:24:57,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:24:57,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872194903] [2020-09-24 18:24:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:24:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:57,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:58,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:58,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 18:24:58,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:24:58,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-09-24 18:24:58,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:24:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 18:24:58,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:24:58,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 18:24:58,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:24:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:24:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:24:58,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:24:58,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:24:58,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:24:58,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 18:24:58,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:24:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:24:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:24:58,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:24:58,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:24:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:24:58,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872194903] [2020-09-24 18:24:58,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:24:58,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 18:24:58,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807442391] [2020-09-24 18:24:58,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 18:24:58,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:24:58,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 18:24:58,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 18:24:58,539 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 18:25:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:00,434 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-24 18:25:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:25:00,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-09-24 18:25:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:00,458 INFO L225 Difference]: With dead ends: 1069 [2020-09-24 18:25:00,458 INFO L226 Difference]: Without dead ends: 555 [2020-09-24 18:25:00,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-24 18:25:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-24 18:25:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-24 18:25:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-24 18:25:00,564 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 44 [2020-09-24 18:25:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:00,565 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-24 18:25:00,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 18:25:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-24 18:25:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 18:25:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:00,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:00,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:25:00,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash -739682472, now seen corresponding path program 1 times [2020-09-24 18:25:00,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572685110] [2020-09-24 18:25:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:02,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:02,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-24 18:25:02,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:25:02,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-09-24 18:25:02,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:02,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-09-24 18:25:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 18:25:02,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:02,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:02,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:02,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:02,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:02,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:25:02,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:02,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:02,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:02,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:02,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:02,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:25:02,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:02,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 18:25:02,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:02,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:02,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:02,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 18:25:02,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:02,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572685110] [2020-09-24 18:25:02,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:02,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:25:02,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543118719] [2020-09-24 18:25:02,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:02,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:02,643 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 5 states. [2020-09-24 18:25:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:04,584 INFO L93 Difference]: Finished difference Result 1235 states and 1577 transitions. [2020-09-24 18:25:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:25:04,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2020-09-24 18:25:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:04,590 INFO L225 Difference]: With dead ends: 1235 [2020-09-24 18:25:04,590 INFO L226 Difference]: Without dead ends: 707 [2020-09-24 18:25:04,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:25:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-09-24 18:25:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 697. [2020-09-24 18:25:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-09-24 18:25:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 855 transitions. [2020-09-24 18:25:04,640 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 855 transitions. Word has length 124 [2020-09-24 18:25:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:04,641 INFO L479 AbstractCegarLoop]: Abstraction has 697 states and 855 transitions. [2020-09-24 18:25:04,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:25:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 855 transitions. [2020-09-24 18:25:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 18:25:04,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:04,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:04,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:25:04,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:04,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1991578147, now seen corresponding path program 1 times [2020-09-24 18:25:04,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:04,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098364911] [2020-09-24 18:25:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:04,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:05,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:05,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:05,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:07,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:07,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:07,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:09,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:09,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 18:25:09,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:25:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4411 [2020-09-24 18:25:09,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-24 18:25:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:25:09,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:09,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:09,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:09,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:09,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:09,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:09,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:25:09,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:09,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:09,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:09,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:09,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 18:25:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 18:25:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 18:25:09,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:09,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098364911] [2020-09-24 18:25:09,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:09,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:25:09,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86664815] [2020-09-24 18:25:09,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:09,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:09,447 INFO L87 Difference]: Start difference. First operand 697 states and 855 transitions. Second operand 5 states. [2020-09-24 18:25:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:11,590 INFO L93 Difference]: Finished difference Result 1875 states and 2393 transitions. [2020-09-24 18:25:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:25:11,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-09-24 18:25:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:11,602 INFO L225 Difference]: With dead ends: 1875 [2020-09-24 18:25:11,602 INFO L226 Difference]: Without dead ends: 1193 [2020-09-24 18:25:11,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:25:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2020-09-24 18:25:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1153. [2020-09-24 18:25:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2020-09-24 18:25:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1406 transitions. [2020-09-24 18:25:11,667 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1406 transitions. Word has length 133 [2020-09-24 18:25:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:11,670 INFO L479 AbstractCegarLoop]: Abstraction has 1153 states and 1406 transitions. [2020-09-24 18:25:11,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:25:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1406 transitions. [2020-09-24 18:25:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-24 18:25:11,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:11,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:11,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:25:11,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:11,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1185927541, now seen corresponding path program 1 times [2020-09-24 18:25:11,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:11,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162037650] [2020-09-24 18:25:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:11,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:11,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:13,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:13,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-09-24 18:25:13,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:25:13,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2122 [2020-09-24 18:25:13,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:13,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-09-24 18:25:13,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 18:25:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:13,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:13,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:13,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:13,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:13,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:25:13,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:13,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:13,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:14,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-24 18:25:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 18:25:14,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 18:25:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:14,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162037650] [2020-09-24 18:25:14,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:14,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:25:14,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147825283] [2020-09-24 18:25:14,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:14,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:14,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:14,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:14,066 INFO L87 Difference]: Start difference. First operand 1153 states and 1406 transitions. Second operand 5 states. [2020-09-24 18:25:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:15,914 INFO L93 Difference]: Finished difference Result 1479 states and 1881 transitions. [2020-09-24 18:25:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:25:15,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-09-24 18:25:15,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:15,926 INFO L225 Difference]: With dead ends: 1479 [2020-09-24 18:25:15,926 INFO L226 Difference]: Without dead ends: 1477 [2020-09-24 18:25:15,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:25:15,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2020-09-24 18:25:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1307. [2020-09-24 18:25:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2020-09-24 18:25:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1651 transitions. [2020-09-24 18:25:15,970 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1651 transitions. Word has length 142 [2020-09-24 18:25:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:15,971 INFO L479 AbstractCegarLoop]: Abstraction has 1307 states and 1651 transitions. [2020-09-24 18:25:15,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:25:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1651 transitions. [2020-09-24 18:25:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 18:25:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:15,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:15,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:25:15,975 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash -430110481, now seen corresponding path program 1 times [2020-09-24 18:25:15,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:15,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213832981] [2020-09-24 18:25:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:16,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:20,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:20,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 18:25:20,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:25:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4020 [2020-09-24 18:25:20,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-09-24 18:25:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 18:25:20,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:20,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:20,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:20,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:20,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:25:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:20,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:20,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:20,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:20,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 18:25:20,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:20,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 18:25:20,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:20,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:20,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:20,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-09-24 18:25:20,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:25:20,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213832981] [2020-09-24 18:25:20,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:20,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 18:25:20,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645515824] [2020-09-24 18:25:20,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:25:20,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:25:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:25:20,277 INFO L87 Difference]: Start difference. First operand 1307 states and 1651 transitions. Second operand 5 states. [2020-09-24 18:25:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:22,160 INFO L93 Difference]: Finished difference Result 3085 states and 4065 transitions. [2020-09-24 18:25:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:25:22,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-09-24 18:25:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:22,174 INFO L225 Difference]: With dead ends: 3085 [2020-09-24 18:25:22,174 INFO L226 Difference]: Without dead ends: 1793 [2020-09-24 18:25:22,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:25:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-09-24 18:25:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1613. [2020-09-24 18:25:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1613 states. [2020-09-24 18:25:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2080 transitions. [2020-09-24 18:25:22,246 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2080 transitions. Word has length 152 [2020-09-24 18:25:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:22,246 INFO L479 AbstractCegarLoop]: Abstraction has 1613 states and 2080 transitions. [2020-09-24 18:25:22,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:25:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2080 transitions. [2020-09-24 18:25:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-24 18:25:22,255 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:22,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:22,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:25:22,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash 215663765, now seen corresponding path program 1 times [2020-09-24 18:25:22,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:22,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000103033] [2020-09-24 18:25:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:22,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:22,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:23,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:24,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:24,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:24,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:27,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-24 18:25:27,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:27,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:27,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:27,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:27,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:27,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:27,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 18:25:27,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:27,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:27,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:27,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:27,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 18:25:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:27,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 18:25:27,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:27,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 18:25:27,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:27,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 18:25:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:27,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:27,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-09-24 18:25:27,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-24 18:25:27,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:25:27,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-24 18:25:27,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:25:28,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000103033] [2020-09-24 18:25:28,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:28,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:25:28,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472764639] [2020-09-24 18:25:28,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:25:28,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:25:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:28,111 INFO L87 Difference]: Start difference. First operand 1613 states and 2080 transitions. Second operand 7 states. [2020-09-24 18:25:31,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:31,083 INFO L93 Difference]: Finished difference Result 4581 states and 6490 transitions. [2020-09-24 18:25:31,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:25:31,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-09-24 18:25:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:31,104 INFO L225 Difference]: With dead ends: 4581 [2020-09-24 18:25:31,104 INFO L226 Difference]: Without dead ends: 2983 [2020-09-24 18:25:31,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:25:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2020-09-24 18:25:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 2702. [2020-09-24 18:25:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2702 states. [2020-09-24 18:25:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 3442 transitions. [2020-09-24 18:25:31,242 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 3442 transitions. Word has length 259 [2020-09-24 18:25:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:31,243 INFO L479 AbstractCegarLoop]: Abstraction has 2702 states and 3442 transitions. [2020-09-24 18:25:31,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:25:31,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 3442 transitions. [2020-09-24 18:25:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-24 18:25:31,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:31,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:31,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:25:31,254 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 322649933, now seen corresponding path program 1 times [2020-09-24 18:25:31,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:31,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774009499] [2020-09-24 18:25:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:31,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:36,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:36,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-09-24 18:25:36,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:36,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:25:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:36,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:36,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:36,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 18:25:36,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:36,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:25:36,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:36,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:25:36,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:36,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:25:36,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:25:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:36,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:36,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:36,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-24 18:25:36,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:36,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-09-24 18:25:36,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:25:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:25:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 18:25:36,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:25:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 18:25:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:36,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:36,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:25:36,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 18:25:36,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:25:36,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-09-24 18:25:36,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:25:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:25:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 18:25:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 18:25:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:25:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 136 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:25:37,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774009499] [2020-09-24 18:25:37,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:25:37,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:25:37,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888499612] [2020-09-24 18:25:37,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:25:37,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:25:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:25:37,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:25:37,041 INFO L87 Difference]: Start difference. First operand 2702 states and 3442 transitions. Second operand 7 states. [2020-09-24 18:25:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:25:40,634 INFO L93 Difference]: Finished difference Result 6579 states and 8729 transitions. [2020-09-24 18:25:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 18:25:40,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-09-24 18:25:40,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:25:40,657 INFO L225 Difference]: With dead ends: 6579 [2020-09-24 18:25:40,657 INFO L226 Difference]: Without dead ends: 3892 [2020-09-24 18:25:40,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:25:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2020-09-24 18:25:40,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3649. [2020-09-24 18:25:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3649 states. [2020-09-24 18:25:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 4558 transitions. [2020-09-24 18:25:40,783 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 4558 transitions. Word has length 259 [2020-09-24 18:25:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:25:40,784 INFO L479 AbstractCegarLoop]: Abstraction has 3649 states and 4558 transitions. [2020-09-24 18:25:40,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:25:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 4558 transitions. [2020-09-24 18:25:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-09-24 18:25:40,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:25:40,798 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:25:40,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:25:40,799 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:25:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:25:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -597160336, now seen corresponding path program 1 times [2020-09-24 18:25:40,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:25:40,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32322924] [2020-09-24 18:25:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:25:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:25:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:41,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:25:41,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking...