/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:42:51,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:42:51,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:42:51,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:42:51,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:42:51,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:42:51,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:42:51,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:42:51,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:42:51,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:42:51,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:42:51,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:42:51,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:42:51,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:42:51,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:42:51,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:42:51,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:42:51,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:42:51,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:42:51,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:42:51,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:42:51,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:42:52,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:42:52,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:42:52,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:42:52,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:42:52,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:42:52,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:42:52,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:42:52,016 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:42:52,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:42:52,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:42:52,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:42:52,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:42:52,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:42:52,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:42:52,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:42:52,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:42:52,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:42:52,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:42:52,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:42:52,027 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 06:42:52,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:42:52,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:42:52,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:42:52,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:42:52,073 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:42:52,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:42:52,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:42:52,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:42:52,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:42:52,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:42:52,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:42:52,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:42:52,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:42:52,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:42:52,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:42:52,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:42:52,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:42:52,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:42:52,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:42:52,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:42:52,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:42:52,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:42:52,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:42:52,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:42:52,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:42:52,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:42:52,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:42:52,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:42:52,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:42:52,080 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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:42:52,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:42:52,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:42:52,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:42:52,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:42:52,640 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:42:52,641 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 06:42:52,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e37d900ee/34b76fc38b0c4d048acae82a5ac6d48a/FLAG334a1f4db [2020-09-25 06:42:53,378 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:42:53,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label43.c [2020-09-25 06:42:53,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e37d900ee/34b76fc38b0c4d048acae82a5ac6d48a/FLAG334a1f4db [2020-09-25 06:42:53,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e37d900ee/34b76fc38b0c4d048acae82a5ac6d48a [2020-09-25 06:42:53,627 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:42:53,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:42:53,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:42:53,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:42:53,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:42:53,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:42:53" (1/1) ... [2020-09-25 06:42:53,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d1dceb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:53, skipping insertion in model container [2020-09-25 06:42:53,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:42:53" (1/1) ... [2020-09-25 06:42:53,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:42:53,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:42:54,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:42:54,232 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:42:54,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:42:54,460 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:42:54,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54 WrapperNode [2020-09-25 06:42:54,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:42:54,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:42:54,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:42:54,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:42:54,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (1/1) ... [2020-09-25 06:42:54,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:42:54,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:42:54,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:42:54,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:42:54,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (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 06:42:54,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:42:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:42:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 06:42:54,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:42:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 06:42:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:42:54,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 06:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:42:54,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:42:56,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:42:56,018 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:42:56,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:42:56 BoogieIcfgContainer [2020-09-25 06:42:56,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:42:56,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:42:56,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:42:56,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:42:56,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:42:53" (1/3) ... [2020-09-25 06:42:56,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f84b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:42:56, skipping insertion in model container [2020-09-25 06:42:56,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:42:54" (2/3) ... [2020-09-25 06:42:56,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f84b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:42:56, skipping insertion in model container [2020-09-25 06:42:56,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:42:56" (3/3) ... [2020-09-25 06:42:56,037 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label43.c [2020-09-25 06:42:56,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:42:56,060 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:42:56,083 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:42:56,120 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:42:56,121 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:42:56,121 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:42:56,121 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:42:56,121 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:42:56,121 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:42:56,122 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:42:56,122 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:42:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 06:42:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-25 06:42:56,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:42:56,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:42:56,183 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:42:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:42:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1333625535, now seen corresponding path program 1 times [2020-09-25 06:42:56,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:42:56,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667994515] [2020-09-25 06:42:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:42:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:42:56,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:56,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:57,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:58,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:42:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:01,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:01,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 06:43:01,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:43:01,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 06:43:01,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:01,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:43:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 06:43:01,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 06:43:01,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:43:01,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:01,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:01,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:01,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:01,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:01,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 06:43:01,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:01,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:01,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:01,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 06:43:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:01,900 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 06:43:01,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667994515] [2020-09-25 06:43:01,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:43:01,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 06:43:01,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303829837] [2020-09-25 06:43:01,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 06:43:01,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 06:43:01,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 06:43:01,932 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 06:43:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:43:04,425 INFO L93 Difference]: Finished difference Result 1235 states and 1633 transitions. [2020-09-25 06:43:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:43:04,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-09-25 06:43:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:43:04,452 INFO L225 Difference]: With dead ends: 1235 [2020-09-25 06:43:04,452 INFO L226 Difference]: Without dead ends: 661 [2020-09-25 06:43:04,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:43:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-09-25 06:43:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 605. [2020-09-25 06:43:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-09-25 06:43:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 715 transitions. [2020-09-25 06:43:04,561 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 715 transitions. Word has length 156 [2020-09-25 06:43:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:43:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 715 transitions. [2020-09-25 06:43:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 06:43:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 715 transitions. [2020-09-25 06:43:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 06:43:04,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:43:04,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:43:04,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:43:04,573 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:43:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:43:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1479520420, now seen corresponding path program 1 times [2020-09-25 06:43:04,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:43:04,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288800405] [2020-09-25 06:43:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:43:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:04,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:04,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:04,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:07,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:09,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:09,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 06:43:09,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 06:43:09,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 06:43:09,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:09,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:09,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:43:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 06:43:09,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 06:43:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:43:09,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:09,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:09,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:43:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:09,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:09,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:09,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:09,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:43:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:09,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:09,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 06:43:09,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:09,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 06:43:09,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:09,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:09,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 06:43:09,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:43:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288800405] [2020-09-25 06:43:09,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:43:09,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:43:09,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45852213] [2020-09-25 06:43:09,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:43:09,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:09,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:43:09,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:43:09,907 INFO L87 Difference]: Start difference. First operand 605 states and 715 transitions. Second operand 5 states. [2020-09-25 06:43:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:43:11,730 INFO L93 Difference]: Finished difference Result 1505 states and 1856 transitions. [2020-09-25 06:43:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:43:11,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-09-25 06:43:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:43:11,746 INFO L225 Difference]: With dead ends: 1505 [2020-09-25 06:43:11,746 INFO L226 Difference]: Without dead ends: 924 [2020-09-25 06:43:11,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:43:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-09-25 06:43:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 891. [2020-09-25 06:43:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2020-09-25 06:43:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1084 transitions. [2020-09-25 06:43:11,811 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1084 transitions. Word has length 173 [2020-09-25 06:43:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:43:11,812 INFO L479 AbstractCegarLoop]: Abstraction has 891 states and 1084 transitions. [2020-09-25 06:43:11,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:43:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1084 transitions. [2020-09-25 06:43:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-09-25 06:43:11,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:43:11,819 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:11,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:43:11,820 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:43:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:43:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -420325430, now seen corresponding path program 1 times [2020-09-25 06:43:11,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:43:11,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987674368] [2020-09-25 06:43:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:43:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:11,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:11,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:12,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:12,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:14,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:14,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:16,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:16,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-09-25 06:43:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:43:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 06:43:16,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:16,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:43:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 06:43:16,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 06:43:16,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:16,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:16,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:16,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:16,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:16,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:43:16,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:16,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:17,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:17,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:17,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:17,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:43:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:17,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:17,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 06:43:17,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:17,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 06:43:17,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:17,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:17,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:17,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:17,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:43:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 06:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:17,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:17,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 06:43:17,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:17,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 06:43:17,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:17,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:43:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:43:17,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 06:43:17,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:43:17,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987674368] [2020-09-25 06:43:17,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:43:17,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 06:43:17,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373149166] [2020-09-25 06:43:17,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:43:17,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:43:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:43:17,429 INFO L87 Difference]: Start difference. First operand 891 states and 1084 transitions. Second operand 7 states. [2020-09-25 06:43:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:43:19,870 INFO L93 Difference]: Finished difference Result 2083 states and 2609 transitions. [2020-09-25 06:43:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 06:43:19,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2020-09-25 06:43:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:43:19,882 INFO L225 Difference]: With dead ends: 2083 [2020-09-25 06:43:19,882 INFO L226 Difference]: Without dead ends: 1216 [2020-09-25 06:43:19,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:43:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2020-09-25 06:43:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1042. [2020-09-25 06:43:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1042 states. [2020-09-25 06:43:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 1294 transitions. [2020-09-25 06:43:19,944 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 1294 transitions. Word has length 218 [2020-09-25 06:43:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:43:19,945 INFO L479 AbstractCegarLoop]: Abstraction has 1042 states and 1294 transitions. [2020-09-25 06:43:19,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:43:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 1294 transitions. [2020-09-25 06:43:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-25 06:43:19,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:43:19,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:19,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:43:19,954 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:43:19,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:43:19,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1776606615, now seen corresponding path program 1 times [2020-09-25 06:43:19,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:43:19,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527723635] [2020-09-25 06:43:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:43:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:20,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:20,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:22,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:22,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:23,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:25,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:25,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-25 06:43:25,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:43:25,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 06:43:25,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:25,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:43:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-09-25 06:43:25,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 06:43:25,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:25,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:25,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:25,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:25,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:25,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 06:43:25,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:25,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:25,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:25,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:25,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:43:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:25,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:25,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:25,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:43:25,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 06:43:25,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:25,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:43:25,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:25,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 06:43:25,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:25,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 06:43:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:25,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:25,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 06:43:25,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 06:43:25,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:25,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:43:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 06:43:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 06:43:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:43:25,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527723635] [2020-09-25 06:43:25,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:43:25,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 06:43:25,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272047242] [2020-09-25 06:43:25,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:43:25,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:43:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:43:25,439 INFO L87 Difference]: Start difference. First operand 1042 states and 1294 transitions. Second operand 8 states. [2020-09-25 06:43:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:43:28,798 INFO L93 Difference]: Finished difference Result 2787 states and 3549 transitions. [2020-09-25 06:43:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 06:43:28,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 225 [2020-09-25 06:43:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:43:28,812 INFO L225 Difference]: With dead ends: 2787 [2020-09-25 06:43:28,813 INFO L226 Difference]: Without dead ends: 1769 [2020-09-25 06:43:28,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-25 06:43:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2020-09-25 06:43:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1660. [2020-09-25 06:43:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2020-09-25 06:43:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2043 transitions. [2020-09-25 06:43:28,880 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2043 transitions. Word has length 225 [2020-09-25 06:43:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:43:28,880 INFO L479 AbstractCegarLoop]: Abstraction has 1660 states and 2043 transitions. [2020-09-25 06:43:28,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:43:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2043 transitions. [2020-09-25 06:43:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-09-25 06:43:28,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:43:28,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:28,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:43:28,890 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:43:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:43:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1031297254, now seen corresponding path program 1 times [2020-09-25 06:43:28,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:43:28,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591111789] [2020-09-25 06:43:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:43:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:28,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:29,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:30,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:30,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:33,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:33,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-09-25 06:43:33,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 06:43:33,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 06:43:33,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:33,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:33,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:43:33,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-09-25 06:43:33,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-09-25 06:43:33,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:34,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:34,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:34,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:34,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:34,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:43:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:34,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:34,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:34,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:43:34,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 06:43:34,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:34,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:34,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 06:43:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:34,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:34,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 06:43:34,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:34,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 06:43:34,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 06:43:34,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591111789] [2020-09-25 06:43:34,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:43:34,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:43:34,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132294626] [2020-09-25 06:43:34,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:43:34,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:34,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:43:34,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:43:34,279 INFO L87 Difference]: Start difference. First operand 1660 states and 2043 transitions. Second operand 5 states. [2020-09-25 06:43:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:43:36,320 INFO L93 Difference]: Finished difference Result 3874 states and 4796 transitions. [2020-09-25 06:43:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:43:36,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-09-25 06:43:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:43:36,331 INFO L225 Difference]: With dead ends: 3874 [2020-09-25 06:43:36,331 INFO L226 Difference]: Without dead ends: 1610 [2020-09-25 06:43:36,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 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 06:43:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2020-09-25 06:43:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1600. [2020-09-25 06:43:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1600 states. [2020-09-25 06:43:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 1934 transitions. [2020-09-25 06:43:36,385 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 1934 transitions. Word has length 240 [2020-09-25 06:43:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:43:36,385 INFO L479 AbstractCegarLoop]: Abstraction has 1600 states and 1934 transitions. [2020-09-25 06:43:36,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:43:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 1934 transitions. [2020-09-25 06:43:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-09-25 06:43:36,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:43:36,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:36,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:43:36,395 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:43:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:43:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1508954734, now seen corresponding path program 1 times [2020-09-25 06:43:36,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:43:36,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450887814] [2020-09-25 06:43:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:43:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:36,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:36,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:36,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:36,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:37,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:37,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:37,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:39,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:39,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:40,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:41,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:41,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-09-25 06:43:41,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 06:43:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 06:43:41,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:41,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:43:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 06:43:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 205 [2020-09-25 06:43:41,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:43:41,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:43:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:41,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:41,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:43:41,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:41,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:43:41,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 06:43:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:41,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:41,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:41,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 06:43:41,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:43:41,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 06:43:41,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:41,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 06:43:41,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:41,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 06:43:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:43:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:43:41,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:43:41,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 06:43:41,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:43:41,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 06:43:41,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 06:43:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 06:43:41,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450887814] [2020-09-25 06:43:41,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 06:43:41,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 06:43:41,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620958600] [2020-09-25 06:43:41,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:43:41,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:43:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:43:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:43:41,833 INFO L87 Difference]: Start difference. First operand 1600 states and 1934 transitions. Second operand 5 states.