/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=BIGGEST --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-fpi/res2o.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:11:52,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:11:52,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:11:52,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:11:52,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:11:52,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:11:52,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:11:52,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:11:52,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:11:52,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:11:52,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:11:52,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:11:52,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:11:52,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:11:52,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:11:52,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:11:52,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:11:52,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:11:52,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:11:52,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:11:52,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:11:52,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:11:52,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:11:52,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:11:52,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:11:52,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:11:52,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:11:52,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:11:52,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:11:52,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:11:52,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:11:52,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:11:52,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:11:52,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:11:52,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:11:52,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:11:52,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:11:52,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:11:52,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:11:52,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:11:52,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:11:52,977 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 [2020-10-12 10:11:52,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:11:52,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:11:53,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:11:53,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:11:53,000 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:11:53,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:11:53,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:11:53,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:11:53,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:11:53,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:11:53,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:11:53,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:11:53,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:11:53,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:11:53,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:11:53,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:11:53,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:53,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:11:53,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:11:53,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:11:53,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:11:53,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:11:53,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:11:53,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:11:53,005 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:11:53,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:11:53,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:11:53,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:11:53,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:11:53,316 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:11:53,316 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2o.c [2020-10-12 10:11:53,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ab33e66/aaed605307b54b36824ccaa084ab8bd1/FLAG1b7df0eab [2020-10-12 10:11:53,839 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:11:53,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2o.c [2020-10-12 10:11:53,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ab33e66/aaed605307b54b36824ccaa084ab8bd1/FLAG1b7df0eab [2020-10-12 10:11:54,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/17ab33e66/aaed605307b54b36824ccaa084ab8bd1 [2020-10-12 10:11:54,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:11:54,221 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:11:54,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:54,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:11:54,228 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:11:54,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5253b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54, skipping insertion in model container [2020-10-12 10:11:54,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:11:54,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:11:54,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:54,442 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:11:54,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:11:54,483 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:11:54,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54 WrapperNode [2020-10-12 10:11:54,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:11:54,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:11:54,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:11:54,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:11:54,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... [2020-10-12 10:11:54,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:11:54,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:11:54,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:11:54,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:11:54,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:11:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:11:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:11:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:11:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:11:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:11:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:11:54,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:11:54,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:11:54,943 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:11:54,943 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 10:11:54,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:54 BoogieIcfgContainer [2020-10-12 10:11:54,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:11:54,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:11:54,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:11:54,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:11:54,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:11:54" (1/3) ... [2020-10-12 10:11:54,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b456e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:54, skipping insertion in model container [2020-10-12 10:11:54,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:11:54" (2/3) ... [2020-10-12 10:11:54,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b456e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:11:54, skipping insertion in model container [2020-10-12 10:11:54,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:11:54" (3/3) ... [2020-10-12 10:11:54,958 INFO L109 eAbstractionObserver]: Analyzing ICFG res2o.c [2020-10-12 10:11:54,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:11:54,979 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:11:55,002 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:11:55,035 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:11:55,035 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:11:55,035 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:11:55,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:11:55,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:11:55,036 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:11:55,036 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:11:55,036 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:11:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-12 10:11:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 10:11:55,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:55,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:55,069 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:55,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-10-12 10:11:55,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:55,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239214954] [2020-10-12 10:11:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:55,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:55,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 10:11:56,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:11:56,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-12 10:11:56,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:11:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:11:56,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:11:56,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:11:56,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:11:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:11:56,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:11:56,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:11:56,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:11:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:11:56,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:11:56,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:11:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:56,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:11:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:11:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:11:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 10:11:56,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:11:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:11:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:11:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:11:56,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:11:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:11:56,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239214954] [2020-10-12 10:11:56,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:11:56,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 10:11:56,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427992019] [2020-10-12 10:11:56,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:11:56,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:11:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:11:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:11:56,710 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 8 states. [2020-10-12 10:11:57,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:11:57,140 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-12 10:11:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:11:57,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-12 10:11:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:11:57,165 INFO L225 Difference]: With dead ends: 98 [2020-10-12 10:11:57,165 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:11:57,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:11:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:11:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 10:11:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:11:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-12 10:11:57,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 29 [2020-10-12 10:11:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:11:57,227 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-12 10:11:57,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:11:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-12 10:11:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:11:57,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:11:57,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:11:57,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:11:57,234 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:11:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:11:57,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1710123337, now seen corresponding path program 1 times [2020-10-12 10:11:57,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:11:57,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612174585] [2020-10-12 10:11:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:11:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:11:57,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:57,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:11:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:00,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:00,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:12:00,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3453 [2020-10-12 10:12:00,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:12:00,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 10:12:00,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:12:00,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:00,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:00,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:00,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:12:00,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:00,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:00,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:00,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:00,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:00,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:00,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:00,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:00,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:00,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:00,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:00,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:00,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:00,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612174585] [2020-10-12 10:12:00,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:12:00,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:12:00,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373455450] [2020-10-12 10:12:00,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:12:00,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:12:00,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:12:00,795 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 6 states. [2020-10-12 10:12:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:01,057 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2020-10-12 10:12:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:12:01,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-12 10:12:01,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:01,060 INFO L225 Difference]: With dead ends: 92 [2020-10-12 10:12:01,060 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 10:12:01,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 10:12:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-12 10:12:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 10:12:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-12 10:12:01,081 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 31 [2020-10-12 10:12:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:01,081 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-12 10:12:01,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:12:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-12 10:12:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:12:01,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:01,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:01,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:12:01,086 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1155788663, now seen corresponding path program 1 times [2020-10-12 10:12:01,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:01,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340419675] [2020-10-12 10:12:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:01,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:02,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:05,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:12:05,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:12:05,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4393 [2020-10-12 10:12:05,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:05,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:05,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:05,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:12:05,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:05,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:05,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:05,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:05,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:05,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:05,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:05,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:05,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:05,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:05,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:05,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:05,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:05,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340419675] [2020-10-12 10:12:05,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:05,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:05,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456094554] [2020-10-12 10:12:05,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:05,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:05,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:05,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:05,610 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 8 states. [2020-10-12 10:12:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:05,861 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-12 10:12:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:12:05,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-12 10:12:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:05,863 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:12:05,864 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:12:05,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:12:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 10:12:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:12:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 10:12:05,871 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 31 [2020-10-12 10:12:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:05,872 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 10:12:05,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 10:12:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 10:12:05,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:05,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:05,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:12:05,874 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:05,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:05,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1942598005, now seen corresponding path program 1 times [2020-10-12 10:12:05,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:05,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67014483] [2020-10-12 10:12:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:05,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:05,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:08,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 10:12:08,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:08,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2903 [2020-10-12 10:12:08,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:12:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:08,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:12:08,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:08,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:08,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:08,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:08,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:12:08,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:08,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:08,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:08,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:08,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:08,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:08,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:08,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:08,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67014483] [2020-10-12 10:12:08,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:08,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:12:08,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76946154] [2020-10-12 10:12:08,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:12:08,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:12:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:12:08,925 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 9 states. [2020-10-12 10:12:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:09,204 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-12 10:12:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:12:09,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-12 10:12:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:09,206 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:12:09,206 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 10:12:09,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:12:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 10:12:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 10:12:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 10:12:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-12 10:12:09,224 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-12 10:12:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:09,225 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-12 10:12:09,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:12:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-12 10:12:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 10:12:09,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:09,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:09,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:12:09,230 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:09,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1828856755, now seen corresponding path program 1 times [2020-10-12 10:12:09,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:09,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451593940] [2020-10-12 10:12:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:09,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:10,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 10:12:11,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 10:12:11,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-12 10:12:11,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:12:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:12:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:12:11,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:11,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:11,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:11,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:11,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:11,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:11,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:11,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:11,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:11,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:11,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:11,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:11,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:11,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451593940] [2020-10-12 10:12:11,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:11,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:12:11,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996095338] [2020-10-12 10:12:11,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:12:11,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:11,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:12:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:12:11,447 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 10 states. [2020-10-12 10:12:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:11,721 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-12 10:12:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:12:11,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-12 10:12:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:11,722 INFO L225 Difference]: With dead ends: 63 [2020-10-12 10:12:11,722 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 10:12:11,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:12:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 10:12:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-12 10:12:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:12:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-12 10:12:11,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 35 [2020-10-12 10:12:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:11,730 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-12 10:12:11,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:12:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-12 10:12:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:12:11,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:11,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:11,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:12:11,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1215486415, now seen corresponding path program 1 times [2020-10-12 10:12:11,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:11,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518366398] [2020-10-12 10:12:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:13,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:16,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 10:12:16,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 10:12:16,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4622 [2020-10-12 10:12:16,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:12:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:16,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:12:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:16,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:16,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:16,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:16,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:12:16,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:16,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:16,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:16,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:16,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:16,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:16,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:16,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:12:16,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:16,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:16,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:16,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:16,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:16,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518366398] [2020-10-12 10:12:16,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:16,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:12:16,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250812171] [2020-10-12 10:12:16,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:12:16,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:16,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:12:16,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:12:16,885 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 16 states. [2020-10-12 10:12:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:17,757 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-12 10:12:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:12:17,758 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-12 10:12:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:17,761 INFO L225 Difference]: With dead ends: 74 [2020-10-12 10:12:17,761 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:12:17,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:12:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:12:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-10-12 10:12:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:12:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 10:12:17,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-12 10:12:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:17,773 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 10:12:17,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:12:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 10:12:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:17,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:17,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:17,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:12:17,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1956544209, now seen corresponding path program 2 times [2020-10-12 10:12:17,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:17,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64979152] [2020-10-12 10:12:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:20,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:22,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 10:12:22,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:12:22,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:12:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:12:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:12:22,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:22,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:22,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:22,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:22,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:22,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:22,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:22,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:22,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:22,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:22,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:22,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:22,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:22,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:22,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:22,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:12:22,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64979152] [2020-10-12 10:12:22,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:22,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:22,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747298244] [2020-10-12 10:12:22,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:22,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:22,869 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-10-12 10:12:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:23,186 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2020-10-12 10:12:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:12:23,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-12 10:12:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:23,192 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:12:23,192 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:12:23,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:12:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:12:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 72. [2020-10-12 10:12:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:12:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-12 10:12:23,220 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 39 [2020-10-12 10:12:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:23,220 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-12 10:12:23,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-12 10:12:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 10:12:23,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:23,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:23,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:12:23,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -938383599, now seen corresponding path program 1 times [2020-10-12 10:12:23,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:23,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882665024] [2020-10-12 10:12:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:23,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:23,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:24,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:26,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:27,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:28,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:28,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:12:28,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 10:12:28,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:12:28,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:12:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:12:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:28,811 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-12 10:12:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:29,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:29,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:29,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:29,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:29,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:29,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:29,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:29,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:29,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:29,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882665024] [2020-10-12 10:12:29,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:29,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:12:29,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193821848] [2020-10-12 10:12:29,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:12:29,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:12:29,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:12:29,438 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 21 states. [2020-10-12 10:12:29,870 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 10:12:30,027 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-12 10:12:30,304 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 10:12:30,579 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-12 10:12:30,746 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-12 10:12:30,884 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-12 10:12:31,021 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-12 10:12:31,453 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-12 10:12:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:31,724 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-12 10:12:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:12:31,725 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 10:12:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:31,726 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:12:31,727 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 10:12:31,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:12:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 10:12:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-12 10:12:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:12:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2020-10-12 10:12:31,742 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 39 [2020-10-12 10:12:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:31,742 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2020-10-12 10:12:31,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:12:31,743 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2020-10-12 10:12:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 10:12:31,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:31,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:31,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:12:31,744 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-10-12 10:12:31,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:31,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666605602] [2020-10-12 10:12:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:31,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:33,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:36,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:36,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 10:12:36,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-12 10:12:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-12 10:12:36,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:12:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:12:36,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:37,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:37,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:37,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:37,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:37,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:37,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:37,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:37,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:37,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:37,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666605602] [2020-10-12 10:12:37,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:37,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:12:37,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594441237] [2020-10-12 10:12:37,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:12:37,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:12:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:12:37,796 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 23 states. [2020-10-12 10:12:38,233 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 10:12:38,930 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-12 10:12:39,143 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-12 10:12:39,376 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-12 10:12:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:39,980 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2020-10-12 10:12:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:12:39,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-10-12 10:12:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:39,982 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:12:39,983 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 10:12:39,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:12:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 10:12:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-12 10:12:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 10:12:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-10-12 10:12:39,994 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 41 [2020-10-12 10:12:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:39,994 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-10-12 10:12:39,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:12:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-10-12 10:12:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:12:39,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:39,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:39,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:12:39,996 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:39,996 INFO L82 PathProgramCache]: Analyzing trace with hash -865771691, now seen corresponding path program 2 times [2020-10-12 10:12:39,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:39,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730089970] [2020-10-12 10:12:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:40,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:12:45,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:12:45,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:45,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:45,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:45,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:45,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:45,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:45,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:12:45,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730089970] [2020-10-12 10:12:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:45,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:12:45,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164705583] [2020-10-12 10:12:45,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:12:45,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:12:45,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:12:45,062 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 8 states. [2020-10-12 10:12:45,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:12:45,322 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-12 10:12:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:12:45,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-12 10:12:45,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:12:45,324 INFO L225 Difference]: With dead ends: 83 [2020-10-12 10:12:45,324 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:12:45,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:12:45,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:12:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 10:12:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 10:12:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-12 10:12:45,332 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 43 [2020-10-12 10:12:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:12:45,332 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-12 10:12:45,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:12:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-12 10:12:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 10:12:45,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:12:45,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:12:45,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:12:45,334 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:12:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:12:45,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1021500449, now seen corresponding path program 3 times [2020-10-12 10:12:45,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:12:45,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171129515] [2020-10-12 10:12:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:12:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:45,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:48,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:49,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:49,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:50,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:50,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:12:50,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:12:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:12:50,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:12:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:12:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:12:50,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:51,058 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 10:12:51,193 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-12 10:12:51,354 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-12 10:12:51,498 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-12 10:12:51,646 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-12 10:12:51,922 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 10:12:52,072 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 10:12:52,260 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-12 10:12:52,427 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-12 10:12:52,724 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-12 10:12:53,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:12:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:53,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:12:53,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:53,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:12:53,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:53,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:53,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:53,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:12:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:12:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:12:53,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:12:53,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:12:53,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:12:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:12:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:12:54,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171129515] [2020-10-12 10:12:54,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:12:54,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:12:54,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229402973] [2020-10-12 10:12:54,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:12:54,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:12:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:12:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:12:54,024 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 34 states. [2020-10-12 10:12:54,626 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:12:54,938 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-12 10:12:55,128 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 10:12:55,318 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 10:12:55,584 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-12 10:12:55,897 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 65 [2020-10-12 10:12:56,165 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-12 10:12:56,406 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-12 10:12:56,751 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-10-12 10:12:57,080 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-12 10:12:57,429 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 62 [2020-10-12 10:12:57,874 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 66 [2020-10-12 10:12:58,064 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-12 10:12:58,346 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-12 10:12:58,749 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-12 10:12:59,105 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2020-10-12 10:12:59,615 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 82 [2020-10-12 10:13:00,011 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2020-10-12 10:13:00,412 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 76 [2020-10-12 10:13:00,717 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-12 10:13:01,017 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-12 10:13:01,323 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-12 10:13:01,499 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-12 10:13:01,809 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 60 [2020-10-12 10:13:02,250 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-10-12 10:13:02,726 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-12 10:13:03,044 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-12 10:13:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:03,329 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-12 10:13:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:13:03,330 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 53 [2020-10-12 10:13:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:03,332 INFO L225 Difference]: With dead ends: 88 [2020-10-12 10:13:03,332 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 10:13:03,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=686, Invalid=4006, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 10:13:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 10:13:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-10-12 10:13:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 10:13:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-12 10:13:03,346 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 53 [2020-10-12 10:13:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:03,346 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-12 10:13:03,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:13:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-12 10:13:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:13:03,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:03,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:03,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:13:03,348 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:03,348 INFO L82 PathProgramCache]: Analyzing trace with hash 526443745, now seen corresponding path program 4 times [2020-10-12 10:13:03,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:03,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119058367] [2020-10-12 10:13:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:03,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:03,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:08,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 10:13:08,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:13:08,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:08,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:08,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:08,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:08,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:08,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:08,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:08,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:08,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:08,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:08,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:08,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:08,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:08,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:13:08,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119058367] [2020-10-12 10:13:08,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:08,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:08,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932509913] [2020-10-12 10:13:08,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:08,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:08,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:08,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:08,455 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 10 states. [2020-10-12 10:13:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:08,833 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2020-10-12 10:13:08,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:13:08,833 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-12 10:13:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:08,834 INFO L225 Difference]: With dead ends: 175 [2020-10-12 10:13:08,835 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 10:13:08,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:13:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 10:13:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2020-10-12 10:13:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 10:13:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-12 10:13:08,853 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 55 [2020-10-12 10:13:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:08,854 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-12 10:13:08,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-12 10:13:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 10:13:08,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:08,855 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:08,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:13:08,855 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1872692259, now seen corresponding path program 5 times [2020-10-12 10:13:08,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:08,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525146144] [2020-10-12 10:13:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:10,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:13,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:13:13,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:13,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:13,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:13,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:13,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:13,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:13,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:13,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:13,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:13,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:13,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:13,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:13,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:13,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:13,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:13,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 10:13:13,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525146144] [2020-10-12 10:13:13,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:13,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:13:13,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956592256] [2020-10-12 10:13:13,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:13:13,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:13:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:13:13,959 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 10 states. [2020-10-12 10:13:14,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:14,351 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-12 10:13:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:13:14,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-12 10:13:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:14,352 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:13:14,353 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:13:14,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:13:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:13:14,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 10:13:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:13:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-12 10:13:14,361 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 57 [2020-10-12 10:13:14,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:14,362 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-12 10:13:14,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:13:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-12 10:13:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 10:13:14,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:14,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:14,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:13:14,363 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:14,364 INFO L82 PathProgramCache]: Analyzing trace with hash 739017131, now seen corresponding path program 6 times [2020-10-12 10:13:14,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:14,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181999383] [2020-10-12 10:13:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:14,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:14,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:16,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:18,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:19,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:13:19,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 10:13:19,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:20,045 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-12 10:13:20,195 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-12 10:13:20,728 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-12 10:13:20,909 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-12 10:13:21,098 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-12 10:13:21,293 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-12 10:13:21,466 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-12 10:13:21,745 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-10-12 10:13:22,033 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-12 10:13:22,326 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-12 10:13:22,618 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-12 10:13:22,910 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2020-10-12 10:13:23,179 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-12 10:13:23,429 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-12 10:13:23,673 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-12 10:13:23,975 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-12 10:13:24,241 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-12 10:13:24,485 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-12 10:13:24,757 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-12 10:13:24,965 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 10:13:25,165 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-12 10:13:25,353 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-12 10:13:25,596 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-12 10:13:25,797 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 10:13:26,045 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-12 10:13:26,474 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-12 10:13:27,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:27,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:27,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:13:27,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181999383] [2020-10-12 10:13:27,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:27,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:13:27,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960637753] [2020-10-12 10:13:27,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:13:27,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:13:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1991, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:13:27,899 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 47 states. [2020-10-12 10:13:28,528 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-10-12 10:13:28,896 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-12 10:13:29,215 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2020-10-12 10:13:29,475 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-10-12 10:13:29,740 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-12 10:13:30,595 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2020-10-12 10:13:30,869 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2020-10-12 10:13:31,195 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-12 10:13:31,807 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2020-10-12 10:13:32,280 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 82 [2020-10-12 10:13:32,656 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-12 10:13:33,014 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-12 10:13:33,612 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2020-10-12 10:13:34,004 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2020-10-12 10:13:34,370 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-12 10:13:34,878 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2020-10-12 10:13:35,516 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-12 10:13:35,971 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2020-10-12 10:13:36,518 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-12 10:13:36,974 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-12 10:13:37,987 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 106 [2020-10-12 10:13:38,389 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2020-10-12 10:13:39,070 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 91 [2020-10-12 10:13:39,366 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-12 10:13:40,275 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 125 [2020-10-12 10:13:40,662 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-12 10:13:41,032 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 91 [2020-10-12 10:13:42,252 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 143 [2020-10-12 10:13:42,661 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-12 10:13:43,217 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 99 [2020-10-12 10:13:43,771 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2020-10-12 10:13:44,479 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 114 [2020-10-12 10:13:45,265 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-10-12 10:13:45,878 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 116 [2020-10-12 10:13:46,483 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2020-10-12 10:13:47,061 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 99 [2020-10-12 10:13:47,377 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-12 10:13:47,950 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 99 [2020-10-12 10:13:48,259 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-12 10:13:49,009 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2020-10-12 10:13:49,980 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-12 10:13:50,602 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-12 10:13:51,104 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2020-10-12 10:13:51,599 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-10-12 10:13:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:51,879 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-10-12 10:13:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 10:13:51,879 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 65 [2020-10-12 10:13:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:51,880 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:13:51,880 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:13:51,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=983, Invalid=8917, Unknown=0, NotChecked=0, Total=9900 [2020-10-12 10:13:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:13:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-10-12 10:13:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 10:13:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-12 10:13:51,893 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 65 [2020-10-12 10:13:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:51,893 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-12 10:13:51,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:13:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-12 10:13:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 10:13:51,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:51,895 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:51,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:13:51,895 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -116183123, now seen corresponding path program 7 times [2020-10-12 10:13:51,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:51,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932321889] [2020-10-12 10:13:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:51,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:51,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:52,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:56,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:13:56,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:13:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:57,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:13:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:57,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:13:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:13:57,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:13:57,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:13:57,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:13:57,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:13:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:13:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:13:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:13:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:13:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 10:13:57,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932321889] [2020-10-12 10:13:57,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:13:57,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:13:57,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580190875] [2020-10-12 10:13:57,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:13:57,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:13:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:13:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:13:57,044 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 12 states. [2020-10-12 10:13:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:13:57,847 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2020-10-12 10:13:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:13:57,848 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 10:13:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:13:57,850 INFO L225 Difference]: With dead ends: 161 [2020-10-12 10:13:57,850 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 10:13:57,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:13:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 10:13:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2020-10-12 10:13:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 10:13:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-10-12 10:13:57,864 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 67 [2020-10-12 10:13:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:13:57,864 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-10-12 10:13:57,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:13:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-10-12 10:13:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 10:13:57,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:13:57,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:13:57,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:13:57,866 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:13:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:13:57,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2090544623, now seen corresponding path program 8 times [2020-10-12 10:13:57,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:13:57,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408994123] [2020-10-12 10:13:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:13:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:13:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:57,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:13:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:02,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:02,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 10:14:02,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:14:02,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:14:02,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:14:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:14:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:03,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:03,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:03,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:03,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:03,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:03,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:14:03,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:03,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:03,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:03,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:03,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:03,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:03,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:03,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:03,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:03,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:14:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-12 10:14:03,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408994123] [2020-10-12 10:14:03,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:03,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:14:03,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132065327] [2020-10-12 10:14:03,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:14:03,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:03,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:14:03,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:14:03,044 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 12 states. [2020-10-12 10:14:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:03,671 INFO L93 Difference]: Finished difference Result 164 states and 177 transitions. [2020-10-12 10:14:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:14:03,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-12 10:14:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:03,673 INFO L225 Difference]: With dead ends: 164 [2020-10-12 10:14:03,673 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 10:14:03,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:14:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 10:14:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-12 10:14:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:14:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-12 10:14:03,685 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 69 [2020-10-12 10:14:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:03,685 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-12 10:14:03,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:14:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-12 10:14:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 10:14:03,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:03,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:03,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:14:03,687 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1709261449, now seen corresponding path program 9 times [2020-10-12 10:14:03,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:03,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406809781] [2020-10-12 10:14:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:06,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:08,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:09,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:09,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 10:14:09,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:14:09,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5298 [2020-10-12 10:14:09,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 10:14:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:14:09,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 10:14:09,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:09,631 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 10:14:09,758 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 10:14:09,911 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-12 10:14:10,081 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-12 10:14:10,306 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-12 10:14:10,441 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-12 10:14:10,636 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-10-12 10:14:10,801 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-12 10:14:11,002 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-12 10:14:11,250 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 10:14:11,486 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-12 10:14:11,771 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-12 10:14:12,082 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2020-10-12 10:14:12,421 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-10-12 10:14:12,652 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 10:14:13,008 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 83 [2020-10-12 10:14:13,380 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 83 [2020-10-12 10:14:13,794 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2020-10-12 10:14:14,201 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2020-10-12 10:14:14,699 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 89 [2020-10-12 10:14:15,130 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 89 [2020-10-12 10:14:15,568 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-10-12 10:14:16,006 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 91 [2020-10-12 10:14:16,418 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 88 [2020-10-12 10:14:16,803 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 80 [2020-10-12 10:14:17,381 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 86 [2020-10-12 10:14:17,830 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 81 [2020-10-12 10:14:18,376 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 85 [2020-10-12 10:14:18,781 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2020-10-12 10:14:19,254 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 80 [2020-10-12 10:14:19,667 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 73 [2020-10-12 10:14:20,093 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2020-10-12 10:14:20,388 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 10:14:20,881 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 66 [2020-10-12 10:14:21,188 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-12 10:14:21,549 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2020-10-12 10:14:21,853 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-12 10:14:22,240 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-10-12 10:14:22,557 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2020-10-12 10:14:22,880 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 10:14:23,319 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-12 10:14:24,223 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 10:14:25,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:14:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:25,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:25,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:14:25,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:25,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:14:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:25,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:14:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:25,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:14:25,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:14:25,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:14:25,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:14:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:14:25,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:14:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:14:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:14:25,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:14:25,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:14:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 2 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:14:25,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406809781] [2020-10-12 10:14:25,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:14:25,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 10:14:25,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817895286] [2020-10-12 10:14:25,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 10:14:25,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:14:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 10:14:25,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 10:14:25,220 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 58 states. [2020-10-12 10:14:26,410 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 97 [2020-10-12 10:14:27,006 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 99 [2020-10-12 10:14:27,704 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 98 [2020-10-12 10:14:28,299 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 98 [2020-10-12 10:14:28,877 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 101 [2020-10-12 10:14:29,315 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 71 [2020-10-12 10:14:29,912 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-10-12 10:14:31,576 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 201 DAG size of output: 148 [2020-10-12 10:14:31,909 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2020-10-12 10:14:32,257 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 67 [2020-10-12 10:14:32,883 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 106 [2020-10-12 10:14:33,586 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 108 [2020-10-12 10:14:34,332 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 116 [2020-10-12 10:14:35,105 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 118 [2020-10-12 10:14:35,916 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 100 [2020-10-12 10:14:36,486 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 93 [2020-10-12 10:14:37,295 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 111 [2020-10-12 10:14:37,759 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 83 [2020-10-12 10:14:38,255 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 83 [2020-10-12 10:14:38,934 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 88 [2020-10-12 10:14:39,551 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 91 [2020-10-12 10:14:40,117 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 88 [2020-10-12 10:14:40,626 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 90 [2020-10-12 10:14:41,134 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 91 [2020-10-12 10:14:41,651 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 92 [2020-10-12 10:14:42,146 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 92 [2020-10-12 10:14:43,284 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 127 [2020-10-12 10:14:43,688 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 72 [2020-10-12 10:14:44,431 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 88 [2020-10-12 10:14:44,813 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-12 10:14:45,502 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 90 [2020-10-12 10:14:45,872 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2020-10-12 10:14:46,678 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 98 [2020-10-12 10:14:47,382 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 81 [2020-10-12 10:14:47,919 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 92 [2020-10-12 10:14:48,951 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 128 [2020-10-12 10:14:49,690 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 102 [2020-10-12 10:14:50,511 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 92 [2020-10-12 10:14:51,111 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 100 [2020-10-12 10:14:51,850 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-12 10:14:52,342 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2020-10-12 10:14:52,692 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-12 10:14:53,097 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-12 10:14:53,614 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-12 10:14:53,995 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-12 10:14:54,719 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-12 10:14:55,143 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2020-10-12 10:14:55,605 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-10-12 10:14:55,983 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-12 10:14:57,120 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-12 10:14:57,745 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-12 10:14:58,236 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-10-12 10:14:58,879 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-12 10:14:59,434 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-12 10:14:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:14:59,855 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2020-10-12 10:14:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 10:14:59,856 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 77 [2020-10-12 10:14:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:14:59,858 INFO L225 Difference]: With dead ends: 124 [2020-10-12 10:14:59,858 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 10:14:59,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=1411, Invalid=12631, Unknown=0, NotChecked=0, Total=14042 [2020-10-12 10:14:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 10:14:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2020-10-12 10:14:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 10:14:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-12 10:14:59,883 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 77 [2020-10-12 10:14:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:14:59,883 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-12 10:14:59,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 10:14:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-12 10:14:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:14:59,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:14:59,884 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:14:59,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:14:59,885 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:14:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:14:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1248536455, now seen corresponding path program 10 times [2020-10-12 10:14:59,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:14:59,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688141559] [2020-10-12 10:14:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:14:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:14:59,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:00,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:04,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:04,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 10:15:04,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:15:04,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:05,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:05,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:05,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:05,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:05,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:05,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:05,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:05,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:05,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:05,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:05,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-12 10:15:05,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688141559] [2020-10-12 10:15:05,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:05,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:05,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256892025] [2020-10-12 10:15:05,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:05,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:05,120 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 14 states. [2020-10-12 10:15:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:05,958 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2020-10-12 10:15:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:15:05,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-12 10:15:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:05,960 INFO L225 Difference]: With dead ends: 245 [2020-10-12 10:15:05,961 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 10:15:05,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:15:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 10:15:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-10-12 10:15:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 10:15:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2020-10-12 10:15:05,979 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 79 [2020-10-12 10:15:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:05,979 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2020-10-12 10:15:05,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2020-10-12 10:15:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 10:15:05,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:05,980 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:05,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:15:05,980 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1175466877, now seen corresponding path program 11 times [2020-10-12 10:15:05,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:05,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419889080] [2020-10-12 10:15:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:05,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:10,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:10,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 10:15:10,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:15:10,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:15:10,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:10,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 10:15:10,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:11,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:11,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:11,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:11,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:11,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:11,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:11,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:11,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:11,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:11,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:11,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:11,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:11,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:11,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:11,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:11,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:11,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-12 10:15:11,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419889080] [2020-10-12 10:15:11,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:11,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:11,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280765007] [2020-10-12 10:15:11,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:11,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:11,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:11,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:11,261 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand 14 states. [2020-10-12 10:15:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:12,634 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2020-10-12 10:15:12,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:15:12,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-12 10:15:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:12,637 INFO L225 Difference]: With dead ends: 116 [2020-10-12 10:15:12,638 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 10:15:12,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:15:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 10:15:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 10:15:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 10:15:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-12 10:15:12,669 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 83 [2020-10-12 10:15:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:12,670 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-12 10:15:12,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-12 10:15:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 10:15:12,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:12,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:12,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:15:12,672 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash -682436797, now seen corresponding path program 12 times [2020-10-12 10:15:12,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623909865] [2020-10-12 10:15:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:12,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:17,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:17,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 10:15:17,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:17,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5118 [2020-10-12 10:15:17,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 10:15:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 10:15:17,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:18,723 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-12 10:15:18,919 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 10:15:19,136 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-12 10:15:19,354 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2020-10-12 10:15:19,583 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-12 10:15:19,800 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-12 10:15:20,041 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-12 10:15:20,281 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2020-10-12 10:15:20,598 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-12 10:15:20,979 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-12 10:15:21,395 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2020-10-12 10:15:21,772 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-12 10:15:22,133 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2020-10-12 10:15:22,505 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2020-10-12 10:15:22,879 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-12 10:15:23,343 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 77 [2020-10-12 10:15:23,803 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 80 [2020-10-12 10:15:24,167 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2020-10-12 10:15:24,606 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2020-10-12 10:15:25,140 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-10-12 10:15:25,691 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 90 [2020-10-12 10:15:26,217 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 90 [2020-10-12 10:15:26,616 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-10-12 10:15:27,066 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 86 [2020-10-12 10:15:27,513 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 80 [2020-10-12 10:15:28,005 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 95 [2020-10-12 10:15:28,643 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 98 [2020-10-12 10:15:29,380 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 99 [2020-10-12 10:15:30,070 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 103 [2020-10-12 10:15:30,672 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 103 [2020-10-12 10:15:31,284 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2020-10-12 10:15:31,896 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 105 [2020-10-12 10:15:32,517 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2020-10-12 10:15:33,063 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-10-12 10:15:33,709 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2020-10-12 10:15:34,227 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-12 10:15:34,871 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-12 10:15:35,337 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2020-10-12 10:15:35,845 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2020-10-12 10:15:36,221 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 10:15:36,820 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-12 10:15:37,207 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2020-10-12 10:15:37,641 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-10-12 10:15:37,939 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-12 10:15:38,261 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-10-12 10:15:38,863 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-12 10:15:39,474 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:15:40,096 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:15:41,820 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-12 10:15:44,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:44,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:44,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:44,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:44,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623909865] [2020-10-12 10:15:44,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:44,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 10:15:44,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980737276] [2020-10-12 10:15:44,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 10:15:44,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 10:15:44,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4478, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 10:15:44,329 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 70 states.