/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:24:59,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:24:59,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:24:59,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:24:59,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:24:59,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:24:59,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:24:59,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:24:59,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:24:59,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:24:59,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:24:59,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:24:59,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:24:59,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:24:59,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:24:59,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:24:59,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:24:59,883 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:24:59,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:24:59,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:24:59,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:24:59,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:24:59,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:24:59,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:24:59,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:24:59,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:24:59,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:24:59,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:24:59,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:24:59,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:24:59,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:24:59,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:24:59,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:24:59,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:24:59,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:24:59,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:24:59,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:24:59,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:24:59,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:24:59,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:24:59,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:24:59,918 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 [2020-10-14 18:24:59,979 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:24:59,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:24:59,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:24:59,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:24:59,984 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:24:59,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:24:59,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:24:59,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:24:59,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:24:59,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:24:59,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:24:59,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:24:59,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:24:59,986 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:24:59,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:24:59,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:24:59,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:24:59,987 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:24:59,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:24:59,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:24:59,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:24:59,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:24:59,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:24:59,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:24:59,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:24:59,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:24:59,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:24:59,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:24:59,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:24:59,993 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:25:00,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:25:00,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:25:00,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:25:00,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:25:00,399 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:25:00,400 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-14 18:25:00,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7e1b6df/4de52a19f5534dc8a34248a7c6b08ca1/FLAG95c96fc42 [2020-10-14 18:25:01,048 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:25:01,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome2-2.i [2020-10-14 18:25:01,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7e1b6df/4de52a19f5534dc8a34248a7c6b08ca1/FLAG95c96fc42 [2020-10-14 18:25:01,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf7e1b6df/4de52a19f5534dc8a34248a7c6b08ca1 [2020-10-14 18:25:01,386 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:25:01,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:25:01,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:25:01,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:25:01,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:25:01,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f21738f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01, skipping insertion in model container [2020-10-14 18:25:01,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:25:01,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:25:01,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:25:01,631 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:25:01,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:25:01,676 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:25:01,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01 WrapperNode [2020-10-14 18:25:01,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:25:01,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:25:01,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:25:01,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:25:01,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (1/1) ... [2020-10-14 18:25:01,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:25:01,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:25:01,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:25:01,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:25:01,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (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 [2020-10-14 18:25:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:25:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:25:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:25:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:25:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:25:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:25:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:25:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:25:01,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:25:02,255 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:25:02,256 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 18:25:02,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:25:02 BoogieIcfgContainer [2020-10-14 18:25:02,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:25:02,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:25:02,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:25:02,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:25:02,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:25:01" (1/3) ... [2020-10-14 18:25:02,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0e886c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:25:02, skipping insertion in model container [2020-10-14 18:25:02,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:01" (2/3) ... [2020-10-14 18:25:02,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0e886c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:25:02, skipping insertion in model container [2020-10-14 18:25:02,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:25:02" (3/3) ... [2020-10-14 18:25:02,281 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2020-10-14 18:25:02,296 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:25:02,305 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:25:02,319 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:25:02,343 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:25:02,344 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:25:02,344 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:25:02,344 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:25:02,345 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:25:02,345 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:25:02,345 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:25:02,345 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:25:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-14 18:25:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:25:02,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:02,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:02,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2020-10-14 18:25:02,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:02,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114775157] [2020-10-14 18:25:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:02,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:25:02,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:02,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-14 18:25:02,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:02,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 18:25:02,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:02,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:25:02,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:02,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:02,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:25:02,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:02,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:25:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114775157] [2020-10-14 18:25:02,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:02,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 18:25:02,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95225919] [2020-10-14 18:25:02,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 18:25:02,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 18:25:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:25:02,898 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-14 18:25:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:03,027 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-14 18:25:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 18:25:03,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-14 18:25:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:03,040 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:25:03,041 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 18:25:03,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:25:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 18:25:03,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 18:25:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:25:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-14 18:25:03,095 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2020-10-14 18:25:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:03,096 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-14 18:25:03,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 18:25:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-14 18:25:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:25:03,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:03,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:03,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:25:03,099 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2020-10-14 18:25:03,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:03,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382129153] [2020-10-14 18:25:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:25:03,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:03,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-14 18:25:03,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:03,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:25:03,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:03,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:25:03,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:03,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:03,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:03,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:25:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382129153] [2020-10-14 18:25:03,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:03,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:25:03,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201651996] [2020-10-14 18:25:03,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:25:03,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:03,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:25:03,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:25:03,529 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-10-14 18:25:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:03,671 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-10-14 18:25:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 18:25:03,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 18:25:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:03,674 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:25:03,674 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 18:25:03,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:25:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 18:25:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-14 18:25:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 18:25:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-14 18:25:03,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2020-10-14 18:25:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:03,685 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-14 18:25:03,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:25:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-14 18:25:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 18:25:03,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:03,687 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] [2020-10-14 18:25:03,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:25:03,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2020-10-14 18:25:03,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:03,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016577157] [2020-10-14 18:25:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:04,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:04,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:07,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:25:07,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:25:07,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3346 [2020-10-14 18:25:07,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:07,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:25:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:25:07,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:25:07,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:07,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:07,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:07,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:07,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:07,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:07,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:25:07,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016577157] [2020-10-14 18:25:07,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:07,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:25:07,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721367313] [2020-10-14 18:25:07,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:25:07,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:07,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:25:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:25:07,230 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-10-14 18:25:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:07,588 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-14 18:25:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:25:07,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-14 18:25:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:07,594 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:25:07,594 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 18:25:07,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:25:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 18:25:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-14 18:25:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:25:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-14 18:25:07,612 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 25 [2020-10-14 18:25:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:07,613 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-14 18:25:07,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:25:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-14 18:25:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 18:25:07,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:07,615 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] [2020-10-14 18:25:07,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:25:07,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:07,616 INFO L82 PathProgramCache]: Analyzing trace with hash 475996649, now seen corresponding path program 1 times [2020-10-14 18:25:07,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:07,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807865197] [2020-10-14 18:25:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:07,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:09,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:09,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 18:25:09,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:25:09,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-14 18:25:09,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:09,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:25:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:09,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:25:09,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:09,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:09,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:09,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:09,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:09,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:09,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:09,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:09,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:25:09,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807865197] [2020-10-14 18:25:09,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:09,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:25:09,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908731897] [2020-10-14 18:25:09,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:25:09,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:25:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:25:09,947 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2020-10-14 18:25:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:10,065 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-14 18:25:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:25:10,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-14 18:25:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:10,069 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:25:10,070 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:25:10,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:25:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-14 18:25:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:25:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 18:25:10,081 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2020-10-14 18:25:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:10,081 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 18:25:10,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:25:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 18:25:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:25:10,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:10,083 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:25:10,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:25:10,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:10,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1190260973, now seen corresponding path program 1 times [2020-10-14 18:25:10,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:10,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472806183] [2020-10-14 18:25:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:10,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:13,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:25:13,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:13,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2917 [2020-10-14 18:25:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:13,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:25:13,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:25:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:13,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:13,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:13,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:13,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:13,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:13,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:13,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:13,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:25:13,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472806183] [2020-10-14 18:25:13,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:13,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:25:13,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718119277] [2020-10-14 18:25:13,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:25:13,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:25:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:13,329 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 10 states. [2020-10-14 18:25:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:13,689 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-10-14 18:25:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:25:13,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 18:25:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:13,692 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:25:13,692 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 18:25:13,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:25:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 18:25:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-14 18:25:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 18:25:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-14 18:25:13,715 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2020-10-14 18:25:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:13,715 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-14 18:25:13,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:25:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-14 18:25:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 18:25:13,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:13,717 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:25:13,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:25:13,718 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash -510202603, now seen corresponding path program 1 times [2020-10-14 18:25:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:13,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546080062] [2020-10-14 18:25:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:13,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:14,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:17,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:17,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 18:25:17,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:25:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3806 [2020-10-14 18:25:17,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:17,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:25:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:25:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:17,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:17,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:17,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:17,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:17,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:25:17,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:17,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:25:17,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546080062] [2020-10-14 18:25:17,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:17,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:25:17,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437832103] [2020-10-14 18:25:17,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:17,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:17,875 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 11 states. [2020-10-14 18:25:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:18,360 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-14 18:25:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:25:18,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 18:25:18,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:18,362 INFO L225 Difference]: With dead ends: 55 [2020-10-14 18:25:18,362 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 18:25:18,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:25:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 18:25:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-10-14 18:25:18,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:25:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-14 18:25:18,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-10-14 18:25:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:18,375 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-14 18:25:18,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-14 18:25:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:25:18,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:18,376 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:25:18,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:25:18,377 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1294349536, now seen corresponding path program 1 times [2020-10-14 18:25:18,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:18,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401344963] [2020-10-14 18:25:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:18,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:25:18,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-14 18:25:18,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:18,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:25:18,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:25:18,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 18:25:18,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:18,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:18,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:18,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:18,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:18,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:18,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:18,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:18,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:18,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-14 18:25:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:18,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:18,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:18,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:18,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:25:18,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401344963] [2020-10-14 18:25:18,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:18,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 18:25:18,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886451914] [2020-10-14 18:25:18,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:25:18,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:25:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:25:18,994 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-10-14 18:25:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:19,120 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-14 18:25:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:25:19,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-14 18:25:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:19,122 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:25:19,123 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:25:19,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:25:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:25:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-10-14 18:25:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:25:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-14 18:25:19,132 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 33 [2020-10-14 18:25:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:19,132 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-14 18:25:19,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:25:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-14 18:25:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:25:19,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:19,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:19,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:25:19,134 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:19,135 INFO L82 PathProgramCache]: Analyzing trace with hash -821763303, now seen corresponding path program 1 times [2020-10-14 18:25:19,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:19,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267939347] [2020-10-14 18:25:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:19,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:19,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:19,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:19,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:20,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:20,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:24,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:25:24,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:25:24,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:25:24,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:24,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:24,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:25:24,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 18:25:24,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:25:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:24,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:24,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:24,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:24,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:24,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:24,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:25:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:24,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:24,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:25:24,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:24,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:25:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:25:24,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267939347] [2020-10-14 18:25:24,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:24,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:25:24,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999658434] [2020-10-14 18:25:24,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:24,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:24,415 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 11 states. [2020-10-14 18:25:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:24,939 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-14 18:25:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:25:24,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-14 18:25:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:24,942 INFO L225 Difference]: With dead ends: 71 [2020-10-14 18:25:24,942 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 18:25:24,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:25:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 18:25:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-14 18:25:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 18:25:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-10-14 18:25:24,955 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 41 [2020-10-14 18:25:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:24,956 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-10-14 18:25:24,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-10-14 18:25:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:25:24,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:24,959 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:25:24,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:25:24,960 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1884856091, now seen corresponding path program 1 times [2020-10-14 18:25:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:24,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403907782] [2020-10-14 18:25:24,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:24,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:25,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:25,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:27,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:29,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:29,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:25:29,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:25:29,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:25:29,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:29,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:29,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:25:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:29,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:25:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:30,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:30,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:30,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:30,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:30,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:30,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:30,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:25:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:30,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:30,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:30,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:30,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:30,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:30,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:30,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:30,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:25:30,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403907782] [2020-10-14 18:25:30,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:30,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:25:30,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373371579] [2020-10-14 18:25:30,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:25:30,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:25:30,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:30,065 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 6 states. [2020-10-14 18:25:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:30,211 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2020-10-14 18:25:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:25:30,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-14 18:25:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:30,213 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:25:30,213 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 18:25:30,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 18:25:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-14 18:25:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:25:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-14 18:25:30,237 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 41 [2020-10-14 18:25:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:30,238 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-14 18:25:30,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:25:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-14 18:25:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:25:30,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:30,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-14 18:25:30,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:25:30,247 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash -282856013, now seen corresponding path program 2 times [2020-10-14 18:25:30,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:30,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179325096] [2020-10-14 18:25:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:30,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:30,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:35,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:25:35,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:35,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:25:35,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:35,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:35,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:25:35,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:35,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:25:35,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-14 18:25:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:35,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:35,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:35,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:35,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:35,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:35,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:35,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:25:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:35,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:35,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:35,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:35,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:25:35,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:35,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:35,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:25:35,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 18:25:35,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179325096] [2020-10-14 18:25:35,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:35,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:25:35,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334312650] [2020-10-14 18:25:35,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:25:35,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:25:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:25:35,731 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 12 states. [2020-10-14 18:25:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:36,237 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-14 18:25:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:25:36,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-14 18:25:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:36,240 INFO L225 Difference]: With dead ends: 83 [2020-10-14 18:25:36,240 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:25:36,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:25:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:25:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-14 18:25:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 18:25:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-14 18:25:36,251 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 44 [2020-10-14 18:25:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:36,252 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-14 18:25:36,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:25:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-14 18:25:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:25:36,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:36,253 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 18:25:36,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:25:36,254 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1871203915, now seen corresponding path program 1 times [2020-10-14 18:25:36,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:36,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552334962] [2020-10-14 18:25:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:41,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:25:41,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:25:41,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:25:41,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:41,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:25:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:25:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:41,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:41,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:41,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:41,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:41,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:41,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:41,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:41,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:41,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 18:25:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:41,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:41,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:41,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:41,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:41,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 18:25:41,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552334962] [2020-10-14 18:25:41,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:41,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:25:41,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364335975] [2020-10-14 18:25:41,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:25:41,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:25:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:41,328 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 6 states. [2020-10-14 18:25:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:41,447 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-14 18:25:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:25:41,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-14 18:25:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:41,449 INFO L225 Difference]: With dead ends: 110 [2020-10-14 18:25:41,450 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:25:41,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:25:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:25:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-14 18:25:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:25:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-14 18:25:41,460 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 44 [2020-10-14 18:25:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:41,460 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-14 18:25:41,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:25:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-14 18:25:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:25:41,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:41,462 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2020-10-14 18:25:41,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:25:41,462 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1610653611, now seen corresponding path program 2 times [2020-10-14 18:25:41,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:41,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077382789] [2020-10-14 18:25:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:41,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:42,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:42,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:46,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:25:46,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:25:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:25:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:46,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:25:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:25:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:46,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:46,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:46,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:46,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:46,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:46,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:46,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:46,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:25:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:46,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:46,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:46,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:46,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:46,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:46,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:46,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 18:25:46,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077382789] [2020-10-14 18:25:46,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:46,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:25:46,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415560020] [2020-10-14 18:25:46,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:25:46,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:25:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:25:46,552 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 7 states. [2020-10-14 18:25:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:46,774 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2020-10-14 18:25:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:25:46,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-14 18:25:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:46,776 INFO L225 Difference]: With dead ends: 135 [2020-10-14 18:25:46,777 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:25:46,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:25:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2020-10-14 18:25:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:25:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-10-14 18:25:46,789 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 47 [2020-10-14 18:25:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:46,789 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-10-14 18:25:46,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:25:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-10-14 18:25:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:25:46,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:46,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-14 18:25:46,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:25:46,791 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1577091250, now seen corresponding path program 3 times [2020-10-14 18:25:46,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:46,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572952655] [2020-10-14 18:25:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:25:48,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:48,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1486 [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:25:48,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:48,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:48,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:48,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:25:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:48,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:48,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:48,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:48,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:48,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:48,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:48,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:25:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:48,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:48,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:48,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:48,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:48,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:48,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:48,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 18:25:48,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572952655] [2020-10-14 18:25:48,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:48,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:25:48,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843523146] [2020-10-14 18:25:48,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:25:48,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:25:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:48,355 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 6 states. [2020-10-14 18:25:48,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:48,483 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2020-10-14 18:25:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:25:48,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-14 18:25:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:48,485 INFO L225 Difference]: With dead ends: 134 [2020-10-14 18:25:48,485 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 18:25:48,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 18:25:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-14 18:25:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 18:25:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-14 18:25:48,499 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 49 [2020-10-14 18:25:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:48,499 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-14 18:25:48,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:25:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-14 18:25:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:25:48,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:48,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:48,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:25:48,501 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1358767558, now seen corresponding path program 3 times [2020-10-14 18:25:48,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:48,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661785479] [2020-10-14 18:25:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:49,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:53,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:53,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:25:53,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:25:53,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:25:53,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:53,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:25:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:53,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:25:53,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:53,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:53,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:53,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:53,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:53,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:53,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:53,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:53,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:53,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:53,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 18:25:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:53,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:25:53,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-14 18:25:53,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661785479] [2020-10-14 18:25:53,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:53,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:25:53,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836970787] [2020-10-14 18:25:53,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:25:53,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:53,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:25:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:25:53,600 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 7 states. [2020-10-14 18:25:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:53,770 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-10-14 18:25:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:25:53,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-14 18:25:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:53,771 INFO L225 Difference]: With dead ends: 129 [2020-10-14 18:25:53,771 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 18:25:53,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 18:25:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-14 18:25:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 18:25:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-14 18:25:53,781 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 55 [2020-10-14 18:25:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:53,781 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-14 18:25:53,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:25:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-14 18:25:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:25:53,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:53,782 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:53,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:25:53,783 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:53,783 INFO L82 PathProgramCache]: Analyzing trace with hash -32762893, now seen corresponding path program 4 times [2020-10-14 18:25:53,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:53,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661448684] [2020-10-14 18:25:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:53,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:53,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:58,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:58,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 18:25:58,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:58,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:25:58,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:58,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:25:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:25:58,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:25:58,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:59,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:59,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:59,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:59,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:59,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:59,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:59,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:59,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:59,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:59,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:59,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-14 18:25:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:59,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:59,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:59,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:59,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:59,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:59,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:59,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:25:59,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:59,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 18:25:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:59,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:59,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:25:59,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:59,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:25:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 18:25:59,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661448684] [2020-10-14 18:25:59,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:59,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:25:59,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971081614] [2020-10-14 18:25:59,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:25:59,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:25:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:25:59,047 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 13 states. [2020-10-14 18:25:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:59,695 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-10-14 18:25:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:25:59,696 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-14 18:25:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:59,697 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:25:59,697 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 18:25:59,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:25:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 18:25:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2020-10-14 18:25:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:25:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-10-14 18:25:59,711 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 57 [2020-10-14 18:25:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:59,711 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-10-14 18:25:59,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:25:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-10-14 18:25:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 18:25:59,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:59,712 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:59,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:25:59,713 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash 67087792, now seen corresponding path program 4 times [2020-10-14 18:25:59,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:59,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923533281] [2020-10-14 18:25:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:59,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:04,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:04,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 18:26:04,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:26:04,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:26:04,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:04,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:04,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:04,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:04,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:04,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:04,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:04,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-14 18:26:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:04,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:04,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:04,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:04,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:04,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:04,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-14 18:26:04,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923533281] [2020-10-14 18:26:04,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:04,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:26:04,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571323755] [2020-10-14 18:26:04,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:26:04,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:26:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:26:04,795 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 8 states. [2020-10-14 18:26:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:04,992 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2020-10-14 18:26:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:26:04,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-14 18:26:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:04,994 INFO L225 Difference]: With dead ends: 177 [2020-10-14 18:26:04,994 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 18:26:04,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:26:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 18:26:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-10-14 18:26:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 18:26:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-10-14 18:26:05,005 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 58 [2020-10-14 18:26:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:05,005 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-10-14 18:26:05,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:26:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-10-14 18:26:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:26:05,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:05,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:05,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:26:05,006 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:05,007 INFO L82 PathProgramCache]: Analyzing trace with hash 995035498, now seen corresponding path program 5 times [2020-10-14 18:26:05,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:05,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447028192] [2020-10-14 18:26:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:10,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:26:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:10,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:10,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:10,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:10,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:10,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:10,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 18:26:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:10,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:10,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:10,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:10,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:10,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:10,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:26:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:10,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:10,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:10,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:10,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:10,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:10,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:10,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:10,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-14 18:26:10,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447028192] [2020-10-14 18:26:10,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:10,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:26:10,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623795498] [2020-10-14 18:26:10,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:26:10,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:26:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:26:10,095 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 8 states. [2020-10-14 18:26:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:10,281 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2020-10-14 18:26:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:26:10,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-14 18:26:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:10,283 INFO L225 Difference]: With dead ends: 186 [2020-10-14 18:26:10,283 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 18:26:10,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:26:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 18:26:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2020-10-14 18:26:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:26:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2020-10-14 18:26:10,305 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 65 [2020-10-14 18:26:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:10,305 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2020-10-14 18:26:10,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:26:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2020-10-14 18:26:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:26:10,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:10,308 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:10,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:26:10,309 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1841282410, now seen corresponding path program 5 times [2020-10-14 18:26:10,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:10,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404482165] [2020-10-14 18:26:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:26:15,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:15,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:15,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:15,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:15,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:15,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:15,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:26:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:26:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:15,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:15,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-14 18:26:15,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404482165] [2020-10-14 18:26:15,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:15,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:26:15,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207817081] [2020-10-14 18:26:15,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:26:15,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:26:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:26:15,412 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand 9 states. [2020-10-14 18:26:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:15,676 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2020-10-14 18:26:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:26:15,677 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-14 18:26:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:15,678 INFO L225 Difference]: With dead ends: 167 [2020-10-14 18:26:15,678 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:26:15,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:26:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:26:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-10-14 18:26:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 18:26:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-10-14 18:26:15,701 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 71 [2020-10-14 18:26:15,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:15,702 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-10-14 18:26:15,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:26:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-10-14 18:26:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:26:15,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:15,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:15,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:26:15,704 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:15,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:15,704 INFO L82 PathProgramCache]: Analyzing trace with hash 855260111, now seen corresponding path program 6 times [2020-10-14 18:26:15,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:15,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772067071] [2020-10-14 18:26:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:15,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 18:26:20,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:26:20,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:20,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:20,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:20,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:20,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:20,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:26:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:20,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:20,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:20,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:20,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-14 18:26:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:20,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:20,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:20,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:20,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:20,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:26:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 18:26:20,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772067071] [2020-10-14 18:26:20,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:20,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:26:20,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112760593] [2020-10-14 18:26:20,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:26:20,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:26:20,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:26:20,833 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 9 states. [2020-10-14 18:26:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:21,022 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2020-10-14 18:26:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:26:21,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-14 18:26:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:21,025 INFO L225 Difference]: With dead ends: 223 [2020-10-14 18:26:21,025 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 18:26:21,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:26:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 18:26:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2020-10-14 18:26:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 18:26:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2020-10-14 18:26:21,047 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 73 [2020-10-14 18:26:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:21,047 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2020-10-14 18:26:21,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:26:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2020-10-14 18:26:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:26:21,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:21,048 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:21,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:26:21,048 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1578699567, now seen corresponding path program 6 times [2020-10-14 18:26:21,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:21,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465952608] [2020-10-14 18:26:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:21,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:23,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:23,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:23,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:26:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 18:26:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:26:26,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:26,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:26,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:26,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:26,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:26,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:26,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:26,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:26,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:26,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 18:26:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:26,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:26,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:26,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:26,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:26,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 25 proven. 103 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-14 18:26:26,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465952608] [2020-10-14 18:26:26,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:26,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:26:26,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554075792] [2020-10-14 18:26:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:26:26,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:26:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:26:26,318 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 18 states. [2020-10-14 18:26:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:31,567 INFO L93 Difference]: Finished difference Result 306 states and 360 transitions. [2020-10-14 18:26:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-14 18:26:31,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-14 18:26:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:31,569 INFO L225 Difference]: With dead ends: 306 [2020-10-14 18:26:31,569 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 18:26:31,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1797, Invalid=8303, Unknown=0, NotChecked=0, Total=10100 [2020-10-14 18:26:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 18:26:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 110. [2020-10-14 18:26:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 18:26:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2020-10-14 18:26:31,596 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 79 [2020-10-14 18:26:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:31,597 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2020-10-14 18:26:31,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:26:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2020-10-14 18:26:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:26:31,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:31,599 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:31,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:26:31,599 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1416771194, now seen corresponding path program 7 times [2020-10-14 18:26:31,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:31,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450424805] [2020-10-14 18:26:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:31,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:26:36,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 18:26:36,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:26:36,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:36,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-14 18:26:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:36,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:36,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:36,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:36,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:36,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:36,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-14 18:26:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:36,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:36,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:36,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-14 18:26:36,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450424805] [2020-10-14 18:26:36,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:36,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:26:36,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965602011] [2020-10-14 18:26:36,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:26:36,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:26:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:26:36,687 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand 10 states. [2020-10-14 18:26:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:36,896 INFO L93 Difference]: Finished difference Result 266 states and 322 transitions. [2020-10-14 18:26:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:26:36,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-14 18:26:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:36,898 INFO L225 Difference]: With dead ends: 266 [2020-10-14 18:26:36,898 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 18:26:36,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:26:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 18:26:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2020-10-14 18:26:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 18:26:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-10-14 18:26:36,920 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 81 [2020-10-14 18:26:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:36,920 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-10-14 18:26:36,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:26:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-10-14 18:26:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 18:26:36,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:36,922 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:36,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:26:36,922 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:36,922 INFO L82 PathProgramCache]: Analyzing trace with hash -615337742, now seen corresponding path program 7 times [2020-10-14 18:26:36,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:36,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859524536] [2020-10-14 18:26:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:37,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:38,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:38,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:41,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:26:41,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:41,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:26:41,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:42,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:42,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:42,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:42,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:42,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-14 18:26:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:42,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:42,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:42,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-14 18:26:42,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859524536] [2020-10-14 18:26:42,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:42,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:26:42,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899118401] [2020-10-14 18:26:42,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:26:42,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:26:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:26:42,055 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 11 states. [2020-10-14 18:26:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:42,341 INFO L93 Difference]: Finished difference Result 204 states and 244 transitions. [2020-10-14 18:26:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:26:42,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-14 18:26:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:42,346 INFO L225 Difference]: With dead ends: 204 [2020-10-14 18:26:42,346 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 18:26:42,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:26:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 18:26:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2020-10-14 18:26:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:26:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2020-10-14 18:26:42,364 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 87 [2020-10-14 18:26:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:42,365 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2020-10-14 18:26:42,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:26:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2020-10-14 18:26:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 18:26:42,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:42,366 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:42,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:26:42,366 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash -393410133, now seen corresponding path program 8 times [2020-10-14 18:26:42,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:42,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527597725] [2020-10-14 18:26:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:42,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:26:47,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 18:26:47,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:26:47,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:47,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:47,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:47,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:47,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:47,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:47,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-14 18:26:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:47,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:47,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:47,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:47,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-14 18:26:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:47,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:47,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:47,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:47,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:47,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:47,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:47,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:47,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:47,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 4 proven. 70 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-10-14 18:26:47,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527597725] [2020-10-14 18:26:47,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:47,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:26:47,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138083552] [2020-10-14 18:26:47,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:26:47,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:26:47,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:26:47,490 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand 11 states. [2020-10-14 18:26:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:47,724 INFO L93 Difference]: Finished difference Result 315 states and 386 transitions. [2020-10-14 18:26:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:26:47,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-14 18:26:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:47,726 INFO L225 Difference]: With dead ends: 315 [2020-10-14 18:26:47,726 INFO L226 Difference]: Without dead ends: 215 [2020-10-14 18:26:47,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:26:47,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-14 18:26:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 126. [2020-10-14 18:26:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:26:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-10-14 18:26:47,743 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 89 [2020-10-14 18:26:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:47,743 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-10-14 18:26:47,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:26:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-10-14 18:26:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 18:26:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:47,745 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:47,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:26:47,745 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1962571885, now seen corresponding path program 8 times [2020-10-14 18:26:47,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:47,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990425905] [2020-10-14 18:26:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:47,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:47,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:52,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:26:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:52,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:26:52,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:52,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:52,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:52,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:52,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:52,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-14 18:26:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:52,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:52,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:52,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:52,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 2 proven. 130 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-10-14 18:26:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990425905] [2020-10-14 18:26:52,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:52,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:26:52,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647527000] [2020-10-14 18:26:52,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:26:52,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:52,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:26:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:26:52,926 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 12 states. [2020-10-14 18:26:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:53,254 INFO L93 Difference]: Finished difference Result 227 states and 274 transitions. [2020-10-14 18:26:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:26:53,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-10-14 18:26:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:53,256 INFO L225 Difference]: With dead ends: 227 [2020-10-14 18:26:53,256 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 18:26:53,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:26:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 18:26:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2020-10-14 18:26:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 18:26:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-14 18:26:53,272 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 95 [2020-10-14 18:26:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:53,272 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-14 18:26:53,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:26:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-14 18:26:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 18:26:53,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:53,273 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:53,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:26:53,274 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 173064098, now seen corresponding path program 9 times [2020-10-14 18:26:53,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:53,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069831191] [2020-10-14 18:26:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:53,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:53,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:58,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 18:26:58,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:26:58,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:58,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:58,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:58,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:58,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:58,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:58,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:58,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:58,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-14 18:26:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:58,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:58,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:58,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:58,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:58,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:58,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:58,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-14 18:26:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:58,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:26:58,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:58,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:58,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:58,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:26:58,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-14 18:26:58,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069831191] [2020-10-14 18:26:58,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:58,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:26:58,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312773338] [2020-10-14 18:26:58,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:26:58,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:58,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:26:58,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:26:58,402 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 12 states. [2020-10-14 18:26:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:58,663 INFO L93 Difference]: Finished difference Result 370 states and 458 transitions. [2020-10-14 18:26:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:26:58,664 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-14 18:26:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:58,665 INFO L225 Difference]: With dead ends: 370 [2020-10-14 18:26:58,665 INFO L226 Difference]: Without dead ends: 261 [2020-10-14 18:26:58,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:26:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-14 18:26:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 137. [2020-10-14 18:26:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 18:26:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-10-14 18:26:58,681 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 97 [2020-10-14 18:26:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:58,681 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-10-14 18:26:58,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:26:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-10-14 18:26:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 18:26:58,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:58,683 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:58,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:26:58,683 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash 359867726, now seen corresponding path program 9 times [2020-10-14 18:26:58,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:58,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041857805] [2020-10-14 18:26:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:58,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:58,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:03,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:03,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 18:27:03,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 18:27:03,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:03,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:03,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:03,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:03,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:03,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:03,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-14 18:27:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:03,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:03,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:03,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:03,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 86 proven. 15 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2020-10-14 18:27:03,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041857805] [2020-10-14 18:27:03,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:03,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:27:03,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49282899] [2020-10-14 18:27:03,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:27:03,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:27:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:27:03,771 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 8 states. [2020-10-14 18:27:03,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:03,946 INFO L93 Difference]: Finished difference Result 244 states and 294 transitions. [2020-10-14 18:27:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:27:03,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-14 18:27:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:03,948 INFO L225 Difference]: With dead ends: 244 [2020-10-14 18:27:03,948 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 18:27:03,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:27:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 18:27:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-14 18:27:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 18:27:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2020-10-14 18:27:03,966 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 103 [2020-10-14 18:27:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:03,966 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2020-10-14 18:27:03,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:27:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2020-10-14 18:27:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 18:27:03,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:03,967 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:03,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:27:03,968 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -396001913, now seen corresponding path program 10 times [2020-10-14 18:27:03,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:03,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289223277] [2020-10-14 18:27:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:04,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:04,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:08,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:08,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 18:27:08,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:27:08,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:08,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:27:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 18:27:08,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:27:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:09,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:09,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-14 18:27:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:09,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:09,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:09,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:09,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:09,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-14 18:27:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:09,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:09,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:09,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:09,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:09,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:09,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:09,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:09,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:09,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:09,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-14 18:27:09,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289223277] [2020-10-14 18:27:09,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:09,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:27:09,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869984160] [2020-10-14 18:27:09,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:27:09,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:27:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:27:09,105 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand 13 states. [2020-10-14 18:27:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:09,371 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2020-10-14 18:27:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:27:09,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 105 [2020-10-14 18:27:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:09,375 INFO L225 Difference]: With dead ends: 384 [2020-10-14 18:27:09,375 INFO L226 Difference]: Without dead ends: 269 [2020-10-14 18:27:09,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:27:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-14 18:27:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 145. [2020-10-14 18:27:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 18:27:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2020-10-14 18:27:09,394 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 105 [2020-10-14 18:27:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:09,394 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2020-10-14 18:27:09,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:27:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2020-10-14 18:27:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 18:27:09,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:09,396 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:09,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:27:09,396 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1155446085, now seen corresponding path program 10 times [2020-10-14 18:27:09,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:09,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395070566] [2020-10-14 18:27:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:14,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:14,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 18:27:14,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:14,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:14,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:14,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:14,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:14,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:14,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:14,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:14,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:14,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:14,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:14,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-14 18:27:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:14,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:14,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:14,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-14 18:27:14,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395070566] [2020-10-14 18:27:14,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:14,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:27:14,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338117800] [2020-10-14 18:27:14,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:27:14,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:27:14,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:27:14,498 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand 9 states. [2020-10-14 18:27:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:14,696 INFO L93 Difference]: Finished difference Result 255 states and 305 transitions. [2020-10-14 18:27:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:27:14,697 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-10-14 18:27:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:14,699 INFO L225 Difference]: With dead ends: 255 [2020-10-14 18:27:14,699 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 18:27:14,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:27:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 18:27:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-14 18:27:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 18:27:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2020-10-14 18:27:14,713 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 111 [2020-10-14 18:27:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:14,713 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2020-10-14 18:27:14,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:27:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2020-10-14 18:27:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-14 18:27:14,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:14,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:14,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:27:14,715 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash -349377602, now seen corresponding path program 11 times [2020-10-14 18:27:14,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:14,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497941774] [2020-10-14 18:27:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:14,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:19,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 18:27:19,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:27:19,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:19,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:19,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:19,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:19,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:19,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:19,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-14 18:27:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:19,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:19,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:19,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:19,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:19,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 18:27:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:19,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:19,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:19,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-10-14 18:27:19,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497941774] [2020-10-14 18:27:19,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:19,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:27:19,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43007427] [2020-10-14 18:27:19,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:27:19,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:19,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:27:19,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:27:19,891 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand 14 states. [2020-10-14 18:27:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:20,175 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2020-10-14 18:27:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:27:20,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 113 [2020-10-14 18:27:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:20,177 INFO L225 Difference]: With dead ends: 398 [2020-10-14 18:27:20,178 INFO L226 Difference]: Without dead ends: 277 [2020-10-14 18:27:20,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:27:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-14 18:27:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 153. [2020-10-14 18:27:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 18:27:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2020-10-14 18:27:20,198 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 113 [2020-10-14 18:27:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:20,198 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2020-10-14 18:27:20,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:27:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2020-10-14 18:27:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 18:27:20,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:20,200 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:20,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:27:20,200 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1504118314, now seen corresponding path program 11 times [2020-10-14 18:27:20,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:20,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532714644] [2020-10-14 18:27:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:20,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:20,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:25,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:25,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 18:27:25,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:27:25,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:25,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:27:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 18:27:25,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:25,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:25,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:25,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:25,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:25,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:25,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:25,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:25,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:25,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:25,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:25,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-14 18:27:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:25,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:25,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 132 proven. 40 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-14 18:27:25,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532714644] [2020-10-14 18:27:25,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:25,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:27:25,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299494826] [2020-10-14 18:27:25,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:27:25,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:27:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:27:25,343 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand 10 states. [2020-10-14 18:27:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:25,542 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2020-10-14 18:27:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:27:25,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2020-10-14 18:27:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:25,545 INFO L225 Difference]: With dead ends: 265 [2020-10-14 18:27:25,545 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 18:27:25,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:27:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 18:27:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-14 18:27:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 18:27:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 180 transitions. [2020-10-14 18:27:25,570 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 180 transitions. Word has length 119 [2020-10-14 18:27:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:25,570 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 180 transitions. [2020-10-14 18:27:25,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:27:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 180 transitions. [2020-10-14 18:27:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-14 18:27:25,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:25,572 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:25,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:27:25,572 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:25,573 INFO L82 PathProgramCache]: Analyzing trace with hash -282814621, now seen corresponding path program 12 times [2020-10-14 18:27:25,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:25,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3799119] [2020-10-14 18:27:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:25,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:27:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 18:27:30,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:27:30,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:30,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:30,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:30,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-14 18:27:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:30,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-14 18:27:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:30,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:30,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:30,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 176 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2020-10-14 18:27:30,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3799119] [2020-10-14 18:27:30,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:30,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:27:30,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766086210] [2020-10-14 18:27:30,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:27:30,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:30,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:27:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:27:30,947 INFO L87 Difference]: Start difference. First operand 156 states and 180 transitions. Second operand 15 states. [2020-10-14 18:27:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:31,269 INFO L93 Difference]: Finished difference Result 412 states and 500 transitions. [2020-10-14 18:27:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:27:31,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-10-14 18:27:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:31,271 INFO L225 Difference]: With dead ends: 412 [2020-10-14 18:27:31,272 INFO L226 Difference]: Without dead ends: 285 [2020-10-14 18:27:31,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:27:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-14 18:27:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 161. [2020-10-14 18:27:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 18:27:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2020-10-14 18:27:31,297 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 121 [2020-10-14 18:27:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:31,298 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2020-10-14 18:27:31,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:27:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2020-10-14 18:27:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 18:27:31,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:31,301 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:31,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:27:31,301 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash -208474527, now seen corresponding path program 12 times [2020-10-14 18:27:31,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:31,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690112747] [2020-10-14 18:27:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:31,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:31,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:32,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:36,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:36,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 18:27:36,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:36,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 18:27:36,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:36,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:36,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:36,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:36,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:36,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:36,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:36,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:36,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:36,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-14 18:27:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:36,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:36,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:36,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 155 proven. 57 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-10-14 18:27:36,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690112747] [2020-10-14 18:27:36,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:36,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:27:36,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645353690] [2020-10-14 18:27:36,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:27:36,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:36,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:27:36,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:27:36,711 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand 11 states. [2020-10-14 18:27:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:36,981 INFO L93 Difference]: Finished difference Result 277 states and 327 transitions. [2020-10-14 18:27:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:27:36,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 127 [2020-10-14 18:27:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:36,982 INFO L225 Difference]: With dead ends: 277 [2020-10-14 18:27:36,983 INFO L226 Difference]: Without dead ends: 165 [2020-10-14 18:27:36,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:27:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-14 18:27:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-10-14 18:27:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 18:27:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2020-10-14 18:27:37,009 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 127 [2020-10-14 18:27:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:37,009 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2020-10-14 18:27:37,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:27:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2020-10-14 18:27:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 18:27:37,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:37,011 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:37,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:27:37,012 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1112060454, now seen corresponding path program 13 times [2020-10-14 18:27:37,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:37,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145370307] [2020-10-14 18:27:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:37,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 18:27:42,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:42,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-14 18:27:42,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:27:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 18:27:42,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:27:42,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:42,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:42,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:42,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:42,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:42,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-14 18:27:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:42,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:42,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:42,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:42,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:42,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:42,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:42,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:42,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-14 18:27:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:42,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 4 proven. 210 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-10-14 18:27:42,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145370307] [2020-10-14 18:27:42,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:42,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:27:42,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609788790] [2020-10-14 18:27:42,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:27:42,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:27:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:27:42,258 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand 16 states. [2020-10-14 18:27:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:42,567 INFO L93 Difference]: Finished difference Result 426 states and 514 transitions. [2020-10-14 18:27:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:27:42,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 129 [2020-10-14 18:27:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:42,571 INFO L225 Difference]: With dead ends: 426 [2020-10-14 18:27:42,571 INFO L226 Difference]: Without dead ends: 293 [2020-10-14 18:27:42,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:27:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-10-14 18:27:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 169. [2020-10-14 18:27:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 18:27:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 194 transitions. [2020-10-14 18:27:42,594 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 194 transitions. Word has length 129 [2020-10-14 18:27:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:42,595 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 194 transitions. [2020-10-14 18:27:42,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:27:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 194 transitions. [2020-10-14 18:27:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 18:27:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:42,596 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:42,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:27:42,597 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1642853114, now seen corresponding path program 13 times [2020-10-14 18:27:42,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:42,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136242004] [2020-10-14 18:27:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:47,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:47,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 18:27:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:47,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:47,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:47,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:47,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:47,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:47,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:47,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:47,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:47,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-14 18:27:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:47,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:47,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:47,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:47,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:47,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:47,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:47,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:47,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:47,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 178 proven. 77 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-14 18:27:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136242004] [2020-10-14 18:27:47,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:47,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:27:47,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127620073] [2020-10-14 18:27:47,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:27:47,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:27:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:27:47,801 INFO L87 Difference]: Start difference. First operand 169 states and 194 transitions. Second operand 12 states. [2020-10-14 18:27:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:48,014 INFO L93 Difference]: Finished difference Result 287 states and 337 transitions. [2020-10-14 18:27:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:27:48,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 135 [2020-10-14 18:27:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:48,017 INFO L225 Difference]: With dead ends: 287 [2020-10-14 18:27:48,017 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:27:48,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:27:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:27:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-14 18:27:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 18:27:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2020-10-14 18:27:48,041 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 135 [2020-10-14 18:27:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:48,041 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2020-10-14 18:27:48,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:27:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2020-10-14 18:27:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 18:27:48,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:48,043 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:48,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:27:48,043 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:48,044 INFO L82 PathProgramCache]: Analyzing trace with hash -865380545, now seen corresponding path program 14 times [2020-10-14 18:27:48,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:48,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441045397] [2020-10-14 18:27:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:48,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:48,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:27:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:53,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:53,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:53,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:53,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:53,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:53,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:53,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-14 18:27:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:53,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:53,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:53,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-14 18:27:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:53,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:53,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:53,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:53,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 4 proven. 247 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-10-14 18:27:53,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441045397] [2020-10-14 18:27:53,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:53,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:27:53,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878079924] [2020-10-14 18:27:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:27:53,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:53,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:27:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:27:53,290 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 17 states. [2020-10-14 18:27:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:53,648 INFO L93 Difference]: Finished difference Result 440 states and 528 transitions. [2020-10-14 18:27:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:27:53,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2020-10-14 18:27:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:53,651 INFO L225 Difference]: With dead ends: 440 [2020-10-14 18:27:53,652 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 18:27:53,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:27:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 18:27:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 177. [2020-10-14 18:27:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 18:27:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2020-10-14 18:27:53,676 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 137 [2020-10-14 18:27:53,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:53,676 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2020-10-14 18:27:53,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:27:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2020-10-14 18:27:53,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 18:27:53,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:53,677 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:53,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:27:53,678 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:53,678 INFO L82 PathProgramCache]: Analyzing trace with hash 48225661, now seen corresponding path program 14 times [2020-10-14 18:27:53,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:53,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788646656] [2020-10-14 18:27:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:58,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5243 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 18:27:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:59,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:59,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:59,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:59,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:59,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:59,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-14 18:27:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:59,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:59,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:27:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 201 proven. 100 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2020-10-14 18:27:59,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788646656] [2020-10-14 18:27:59,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:59,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:27:59,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216260660] [2020-10-14 18:27:59,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:27:59,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:27:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:27:59,107 INFO L87 Difference]: Start difference. First operand 177 states and 202 transitions. Second operand 13 states. [2020-10-14 18:27:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:59,341 INFO L93 Difference]: Finished difference Result 298 states and 348 transitions. [2020-10-14 18:27:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:27:59,341 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 143 [2020-10-14 18:27:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:59,342 INFO L225 Difference]: With dead ends: 298 [2020-10-14 18:27:59,342 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 18:27:59,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:27:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 18:27:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-14 18:27:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-14 18:27:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-14 18:27:59,369 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 143 [2020-10-14 18:27:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:59,369 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-14 18:27:59,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:27:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-14 18:27:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-14 18:27:59,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:59,371 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:59,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:27:59,371 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:59,372 INFO L82 PathProgramCache]: Analyzing trace with hash 763684342, now seen corresponding path program 15 times [2020-10-14 18:27:59,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:59,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439435769] [2020-10-14 18:27:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:59,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:59,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:05,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 18:28:05,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5710 [2020-10-14 18:28:05,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:05,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:28:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 18:28:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:28:05,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:05,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:05,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:05,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:05,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:05,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:05,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:05,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:05,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:05,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:05,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-10-14 18:28:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:05,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:05,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:05,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:05,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:05,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:05,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:05,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:05,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:05,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-14 18:28:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:05,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:05,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:05,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:05,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:05,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:05,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:05,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:05,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 4 proven. 287 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-14 18:28:05,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439435769] [2020-10-14 18:28:05,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:05,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:28:05,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587999437] [2020-10-14 18:28:05,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:28:05,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:28:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:28:05,333 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 18 states. [2020-10-14 18:28:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:05,669 INFO L93 Difference]: Finished difference Result 454 states and 542 transitions. [2020-10-14 18:28:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:28:05,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 145 [2020-10-14 18:28:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:05,671 INFO L225 Difference]: With dead ends: 454 [2020-10-14 18:28:05,672 INFO L226 Difference]: Without dead ends: 309 [2020-10-14 18:28:05,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:28:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-14 18:28:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 185. [2020-10-14 18:28:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-14 18:28:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 210 transitions. [2020-10-14 18:28:05,694 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 210 transitions. Word has length 145 [2020-10-14 18:28:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:05,694 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 210 transitions. [2020-10-14 18:28:05,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:28:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 210 transitions. [2020-10-14 18:28:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 18:28:05,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:05,696 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:05,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:28:05,696 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:05,697 INFO L82 PathProgramCache]: Analyzing trace with hash 429603298, now seen corresponding path program 15 times [2020-10-14 18:28:05,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:05,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605555488] [2020-10-14 18:28:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:05,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:05,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:06,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:10,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:10,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 18:28:10,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:28:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-14 18:28:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:10,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:28:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-14 18:28:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:10,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:10,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:10,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:10,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-14 18:28:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:10,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:10,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:10,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:10,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 224 proven. 126 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-10-14 18:28:10,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605555488] [2020-10-14 18:28:10,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:10,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:28:10,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830943752] [2020-10-14 18:28:10,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:28:10,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:28:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:28:10,965 INFO L87 Difference]: Start difference. First operand 185 states and 210 transitions. Second operand 14 states. [2020-10-14 18:28:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:11,232 INFO L93 Difference]: Finished difference Result 309 states and 359 transitions. [2020-10-14 18:28:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:28:11,233 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 151 [2020-10-14 18:28:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:11,235 INFO L225 Difference]: With dead ends: 309 [2020-10-14 18:28:11,235 INFO L226 Difference]: Without dead ends: 188 [2020-10-14 18:28:11,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:28:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-14 18:28:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-14 18:28:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-14 18:28:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 212 transitions. [2020-10-14 18:28:11,262 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 212 transitions. Word has length 151 [2020-10-14 18:28:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:11,262 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 212 transitions. [2020-10-14 18:28:11,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:28:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 212 transitions. [2020-10-14 18:28:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 18:28:11,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:11,263 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:11,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:28:11,264 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2099593957, now seen corresponding path program 16 times [2020-10-14 18:28:11,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:11,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869514419] [2020-10-14 18:28:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:11,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:11,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:16,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:16,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 18:28:16,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:28:16,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:16,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:16,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:16,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:16,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-10-14 18:28:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:16,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:16,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:16,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-14 18:28:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:16,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:16,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:16,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:16,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 4 proven. 330 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-14 18:28:16,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869514419] [2020-10-14 18:28:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:16,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:28:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666287171] [2020-10-14 18:28:16,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:28:16,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:28:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:28:16,577 INFO L87 Difference]: Start difference. First operand 188 states and 212 transitions. Second operand 19 states. [2020-10-14 18:28:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:16,973 INFO L93 Difference]: Finished difference Result 468 states and 556 transitions. [2020-10-14 18:28:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:28:16,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 153 [2020-10-14 18:28:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:16,975 INFO L225 Difference]: With dead ends: 468 [2020-10-14 18:28:16,976 INFO L226 Difference]: Without dead ends: 317 [2020-10-14 18:28:16,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:28:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-14 18:28:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 193. [2020-10-14 18:28:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-14 18:28:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2020-10-14 18:28:17,002 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 153 [2020-10-14 18:28:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:17,002 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2020-10-14 18:28:17,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:28:17,003 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2020-10-14 18:28:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-14 18:28:17,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:17,004 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:17,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:28:17,004 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1684372839, now seen corresponding path program 16 times [2020-10-14 18:28:17,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:17,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033098083] [2020-10-14 18:28:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:17,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:17,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:18,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:22,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:22,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 18:28:22,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:22,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:22,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:22,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:22,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:22,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:22,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:22,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-14 18:28:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:22,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:22,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:22,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:22,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:22,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:22,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:22,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:22,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 2 proven. 322 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2020-10-14 18:28:22,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033098083] [2020-10-14 18:28:22,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:22,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:28:22,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886439994] [2020-10-14 18:28:22,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:28:22,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:28:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:28:22,325 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand 13 states. [2020-10-14 18:28:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:22,658 INFO L93 Difference]: Finished difference Result 321 states and 373 transitions. [2020-10-14 18:28:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:28:22,658 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 159 [2020-10-14 18:28:22,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:22,660 INFO L225 Difference]: With dead ends: 321 [2020-10-14 18:28:22,661 INFO L226 Difference]: Without dead ends: 220 [2020-10-14 18:28:22,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:28:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-14 18:28:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 199. [2020-10-14 18:28:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 18:28:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 226 transitions. [2020-10-14 18:28:22,690 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 226 transitions. Word has length 159 [2020-10-14 18:28:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:22,691 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 226 transitions. [2020-10-14 18:28:22,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:28:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 226 transitions. [2020-10-14 18:28:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-14 18:28:22,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:22,693 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:22,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:28:22,693 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:22,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2111130606, now seen corresponding path program 17 times [2020-10-14 18:28:22,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:22,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782650274] [2020-10-14 18:28:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:27,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:27,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 18:28:27,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:28:27,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:28,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:28,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:28,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:28,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:28,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:28,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:28,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:28,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:28,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:28,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-10-14 18:28:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:28,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:28,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:28,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:28,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:28,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:28,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:28,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:28,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:28,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:28,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-14 18:28:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:28,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:28,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:28,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:28,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:28,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:28,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:28,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:28,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:28,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:28,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 4 proven. 376 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-10-14 18:28:28,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782650274] [2020-10-14 18:28:28,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:28,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:28:28,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112652689] [2020-10-14 18:28:28,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:28:28,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:28,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:28:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:28:28,056 INFO L87 Difference]: Start difference. First operand 199 states and 226 transitions. Second operand 20 states. [2020-10-14 18:28:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:28,612 INFO L93 Difference]: Finished difference Result 529 states and 636 transitions. [2020-10-14 18:28:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:28:28,615 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 161 [2020-10-14 18:28:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:28,619 INFO L225 Difference]: With dead ends: 529 [2020-10-14 18:28:28,620 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 18:28:28,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:28:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 18:28:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 204. [2020-10-14 18:28:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-14 18:28:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 232 transitions. [2020-10-14 18:28:28,665 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 232 transitions. Word has length 161 [2020-10-14 18:28:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:28,665 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 232 transitions. [2020-10-14 18:28:28,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:28:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 232 transitions. [2020-10-14 18:28:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-14 18:28:28,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:28,668 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:28,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:28:28,668 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1824041346, now seen corresponding path program 17 times [2020-10-14 18:28:28,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:28,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637412192] [2020-10-14 18:28:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:28,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:28,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:29,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:33,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 18:28:33,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:33,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:33,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:33,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-14 18:28:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:33,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:33,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:33,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:33,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:33,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:33,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 279 proven. 155 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-10-14 18:28:33,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637412192] [2020-10-14 18:28:33,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:33,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:28:33,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646912713] [2020-10-14 18:28:33,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:28:33,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:28:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:28:33,979 INFO L87 Difference]: Start difference. First operand 204 states and 232 transitions. Second operand 15 states. [2020-10-14 18:28:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:34,444 INFO L93 Difference]: Finished difference Result 341 states and 397 transitions. [2020-10-14 18:28:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:28:34,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 167 [2020-10-14 18:28:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:34,446 INFO L225 Difference]: With dead ends: 341 [2020-10-14 18:28:34,446 INFO L226 Difference]: Without dead ends: 208 [2020-10-14 18:28:34,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:28:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-14 18:28:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-10-14 18:28:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 18:28:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 234 transitions. [2020-10-14 18:28:34,481 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 234 transitions. Word has length 167 [2020-10-14 18:28:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:34,481 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 234 transitions. [2020-10-14 18:28:34,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:28:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 234 transitions. [2020-10-14 18:28:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-14 18:28:34,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:34,483 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:34,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:28:34,483 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:34,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1746127095, now seen corresponding path program 18 times [2020-10-14 18:28:34,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:34,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463889631] [2020-10-14 18:28:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:34,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:34,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:40,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:40,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-14 18:28:40,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5898 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 18:28:40,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:40,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:40,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:40,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:40,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:40,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-10-14 18:28:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:40,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:40,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:40,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:40,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:40,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:40,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:40,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-14 18:28:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:40,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 4 proven. 425 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-14 18:28:40,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463889631] [2020-10-14 18:28:40,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:40,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:28:40,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915541450] [2020-10-14 18:28:40,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:28:40,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:28:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:28:40,666 INFO L87 Difference]: Start difference. First operand 207 states and 234 transitions. Second operand 21 states. [2020-10-14 18:28:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:41,080 INFO L93 Difference]: Finished difference Result 543 states and 650 transitions. [2020-10-14 18:28:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:28:41,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 169 [2020-10-14 18:28:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:41,083 INFO L225 Difference]: With dead ends: 543 [2020-10-14 18:28:41,083 INFO L226 Difference]: Without dead ends: 377 [2020-10-14 18:28:41,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:28:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-14 18:28:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 212. [2020-10-14 18:28:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-14 18:28:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 240 transitions. [2020-10-14 18:28:41,106 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 240 transitions. Word has length 169 [2020-10-14 18:28:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:41,107 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 240 transitions. [2020-10-14 18:28:41,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:28:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 240 transitions. [2020-10-14 18:28:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-14 18:28:41,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:41,109 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:41,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:28:41,109 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 959642233, now seen corresponding path program 18 times [2020-10-14 18:28:41,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:41,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634131038] [2020-10-14 18:28:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:41,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:46,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:46,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-14 18:28:46,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:46,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:46,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:46,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:46,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:46,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:46,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:46,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:46,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:46,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:46,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-14 18:28:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:46,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:46,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:46,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:28:46,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:46,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:28:46,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:46,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:46,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:28:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 2 proven. 403 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2020-10-14 18:28:46,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634131038] [2020-10-14 18:28:46,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:46,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:28:46,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693260496] [2020-10-14 18:28:46,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:28:46,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:46,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:28:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:28:46,379 INFO L87 Difference]: Start difference. First operand 212 states and 240 transitions. Second operand 14 states. [2020-10-14 18:28:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:46,725 INFO L93 Difference]: Finished difference Result 352 states and 410 transitions. [2020-10-14 18:28:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:28:46,726 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 175 [2020-10-14 18:28:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:46,728 INFO L225 Difference]: With dead ends: 352 [2020-10-14 18:28:46,729 INFO L226 Difference]: Without dead ends: 242 [2020-10-14 18:28:46,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:28:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-14 18:28:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2020-10-14 18:28:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-14 18:28:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2020-10-14 18:28:46,761 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 175 [2020-10-14 18:28:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:46,762 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2020-10-14 18:28:46,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:28:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2020-10-14 18:28:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 18:28:46,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:46,764 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:46,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:28:46,764 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -12732370, now seen corresponding path program 19 times [2020-10-14 18:28:46,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:46,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910716151] [2020-10-14 18:28:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:46,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:46,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking...