/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:32,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:32,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:32,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:32,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:32,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:32,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:32,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:32,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:32,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:32,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:32,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:32,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:32,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:32,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:32,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:32,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:32,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:32,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:32,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:32,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:32,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:32,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:32,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:32,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:32,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:32,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:32,954 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:32,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:32,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:32,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:32,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:32,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:32,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:32,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:32,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:32,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:32,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:32,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:32,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:32,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:32,967 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 [2020-10-13 23:22:33,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:33,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:33,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:33,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:33,014 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:33,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:33,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:33,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:33,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:33,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:33,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:33,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:33,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:33,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:33,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:33,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:33,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:33,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:33,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:33,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:33,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:33,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:33,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:33,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:33,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:33,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:33,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:33,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:33,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:33,021 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:22:33,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:33,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:33,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:33,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:33,331 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:33,331 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-13 23:22:33,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be38a9c72/33980806f5254c3a9a48c55d0fdc6692/FLAG8824b3442 [2020-10-13 23:22:33,870 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:33,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-13 23:22:33,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be38a9c72/33980806f5254c3a9a48c55d0fdc6692/FLAG8824b3442 [2020-10-13 23:22:34,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be38a9c72/33980806f5254c3a9a48c55d0fdc6692 [2020-10-13 23:22:34,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:34,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:34,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:34,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:34,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:34,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558bd778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34, skipping insertion in model container [2020-10-13 23:22:34,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:34,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:34,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:34,498 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:34,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:34,538 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:34,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34 WrapperNode [2020-10-13 23:22:34,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:34,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:34,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:34,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:34,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (1/1) ... [2020-10-13 23:22:34,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:34,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:34,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:34,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:34,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (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 [2020-10-13 23:22:34,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:34,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:34,731 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:22:34,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:34,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:22:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:22:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:22:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:22:34,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:22:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:35,077 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:35,077 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 23:22:35,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:35 BoogieIcfgContainer [2020-10-13 23:22:35,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:35,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:35,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:35,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:35,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:34" (1/3) ... [2020-10-13 23:22:35,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57667783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:35, skipping insertion in model container [2020-10-13 23:22:35,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:34" (2/3) ... [2020-10-13 23:22:35,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57667783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:35, skipping insertion in model container [2020-10-13 23:22:35,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:35" (3/3) ... [2020-10-13 23:22:35,091 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2020-10-13 23:22:35,101 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:35,109 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:35,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:35,154 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:35,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:35,154 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:35,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:35,154 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:35,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:35,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:35,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-13 23:22:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:22:35,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:35,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:35,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1057208235, now seen corresponding path program 1 times [2020-10-13 23:22:35,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:35,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479864776] [2020-10-13 23:22:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:35,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:36,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:22:36,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:22:36,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-10-13 23:22:36,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:36,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:36,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:22:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:36,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:22:36,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:36,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:36,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:22:36,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:36,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:36,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:36,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:36,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479864776] [2020-10-13 23:22:36,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:36,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:36,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121155690] [2020-10-13 23:22:36,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:36,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:36,445 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-13 23:22:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:36,559 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2020-10-13 23:22:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:36,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 23:22:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:36,569 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:22:36,570 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:22:36,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:22:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 23:22:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:22:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 23:22:36,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-10-13 23:22:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:36,618 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 23:22:36,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 23:22:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:22:36,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:36,620 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] [2020-10-13 23:22:36,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:36,621 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1855360189, now seen corresponding path program 1 times [2020-10-13 23:22:36,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:36,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792210414] [2020-10-13 23:22:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:36,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:40,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:22:40,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:22:40,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3848 [2020-10-13 23:22:40,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:40,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:40,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:40,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:40,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:22:40,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:40,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:40,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:40,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:40,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:40,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:40,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792210414] [2020-10-13 23:22:40,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:40,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:22:40,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537249129] [2020-10-13 23:22:40,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:22:40,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:22:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:40,535 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-13 23:22:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:40,641 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 23:22:40,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:22:40,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 23:22:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:40,644 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:22:40,644 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:22:40,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:22:40,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 23:22:40,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:22:40,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 23:22:40,653 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-13 23:22:40,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:40,654 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 23:22:40,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:22:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 23:22:40,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:22:40,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:40,655 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] [2020-10-13 23:22:40,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:40,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2113804129, now seen corresponding path program 1 times [2020-10-13 23:22:40,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:40,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658180311] [2020-10-13 23:22:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:40,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:41,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:45,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:22:45,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:22:45,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:22:45,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:45,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:45,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:45,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:45,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:22:45,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:45,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:45,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:45,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:45,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:45,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:45,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:45,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:45,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:22:45,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658180311] [2020-10-13 23:22:45,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:22:45,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802840743] [2020-10-13 23:22:45,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:22:45,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:22:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:45,744 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-13 23:22:45,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:45,922 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-13 23:22:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:22:45,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 23:22:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:45,925 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:22:45,925 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:22:45,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:22:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:22:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 23:22:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:22:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-13 23:22:45,942 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2020-10-13 23:22:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:45,942 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-13 23:22:45,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:22:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-13 23:22:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:22:45,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:45,948 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] [2020-10-13 23:22:45,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:22:45,949 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:45,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -381846593, now seen corresponding path program 1 times [2020-10-13 23:22:45,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:45,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996976711] [2020-10-13 23:22:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:50,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:50,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:22:50,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:22:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:22:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:50,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:22:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:22:50,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:51,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:51,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:51,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:51,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:51,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:51,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:51,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:51,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:51,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:51,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:51,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:22:51,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996976711] [2020-10-13 23:22:51,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:51,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:22:51,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210735403] [2020-10-13 23:22:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:22:51,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:22:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:22:51,062 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2020-10-13 23:22:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:51,283 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2020-10-13 23:22:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:22:51,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 23:22:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:51,285 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:22:51,286 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:22:51,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:22:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:22:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-13 23:22:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:22:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-13 23:22:51,304 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2020-10-13 23:22:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:51,304 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-13 23:22:51,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:22:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-13 23:22:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:22:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:51,307 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] [2020-10-13 23:22:51,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:22:51,308 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1760122197, now seen corresponding path program 1 times [2020-10-13 23:22:51,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:51,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569835048] [2020-10-13 23:22:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:51,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:51,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:56,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:22:56,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:22:56,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:22:56,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:56,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:22:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:56,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:22:56,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:56,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:56,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:56,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:56,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:56,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:56,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:56,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:22:56,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569835048] [2020-10-13 23:22:56,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:56,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:22:56,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111658841] [2020-10-13 23:22:56,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:22:56,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:56,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:22:56,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:22:56,395 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-13 23:22:56,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:56,595 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-13 23:22:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:22:56,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-13 23:22:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:56,597 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:22:56,597 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:22:56,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:22:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:22:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 23:22:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:22:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 23:22:56,606 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 38 [2020-10-13 23:22:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:56,606 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 23:22:56,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:22:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 23:22:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:22:56,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:56,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:56,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:22:56,608 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1896329191, now seen corresponding path program 2 times [2020-10-13 23:22:56,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:56,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848293884] [2020-10-13 23:22:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:56,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:57,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:01,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:23:01,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:23:01,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:23:01,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:01,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:23:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:01,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:23:01,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:02,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:02,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:02,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:02,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:02,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:02,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:02,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:23:02,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848293884] [2020-10-13 23:23:02,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:02,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:23:02,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177430596] [2020-10-13 23:23:02,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:23:02,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:02,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:23:02,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:23:02,669 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 27 states. [2020-10-13 23:23:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:03,684 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-13 23:23:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:23:03,684 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-10-13 23:23:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:03,686 INFO L225 Difference]: With dead ends: 91 [2020-10-13 23:23:03,686 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:23:03,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:23:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:23:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-13 23:23:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:23:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-13 23:23:03,708 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2020-10-13 23:23:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:03,710 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-13 23:23:03,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:23:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-13 23:23:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:23:03,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:03,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:23:03,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:03,715 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 26946245, now seen corresponding path program 3 times [2020-10-13 23:23:03,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:03,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818673099] [2020-10-13 23:23:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:08,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:23:08,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:08,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:08,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:23:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:23:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:08,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:08,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:08,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:08,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:08,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:23:08,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818673099] [2020-10-13 23:23:08,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:08,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:08,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672857749] [2020-10-13 23:23:08,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:08,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:08,847 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-10-13 23:23:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:09,465 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2020-10-13 23:23:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:09,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 23:23:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:09,469 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:23:09,469 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 23:23:09,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:23:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 23:23:09,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-13 23:23:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:23:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-10-13 23:23:09,499 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 54 [2020-10-13 23:23:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:09,502 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-10-13 23:23:09,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-10-13 23:23:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:23:09,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:09,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:23:09,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:09,505 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1975408251, now seen corresponding path program 4 times [2020-10-13 23:23:09,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:09,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003994558] [2020-10-13 23:23:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:23:14,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:14,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:23:14,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:14,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:14,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:23:14,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:14,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:14,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:14,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:14,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:23:14,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003994558] [2020-10-13 23:23:14,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:14,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:14,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001566217] [2020-10-13 23:23:14,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:14,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:14,624 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 10 states. [2020-10-13 23:23:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:14,980 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2020-10-13 23:23:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:23:14,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 23:23:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:14,982 INFO L225 Difference]: With dead ends: 157 [2020-10-13 23:23:14,982 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:23:14,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:23:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:23:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-13 23:23:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:23:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-13 23:23:14,993 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 54 [2020-10-13 23:23:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:14,994 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-13 23:23:14,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-13 23:23:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:23:14,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:14,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:23:14,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:15,000 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1675076345, now seen corresponding path program 5 times [2020-10-13 23:23:15,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:15,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551495932] [2020-10-13 23:23:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:15,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:20,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:23:20,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:20,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 23:23:20,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:20,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 23:23:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:20,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:23:20,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:23,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:23,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:23,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:23,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:23,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:23,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:23,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:23,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:23,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551495932] [2020-10-13 23:23:23,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:23,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 23:23:23,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91307169] [2020-10-13 23:23:23,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 23:23:23,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 23:23:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2001, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:23:23,873 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 47 states. [2020-10-13 23:23:25,315 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-13 23:23:25,784 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-13 23:23:26,147 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-13 23:23:26,907 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 35 [2020-10-13 23:23:27,266 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-10-13 23:23:27,721 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2020-10-13 23:23:27,951 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 23:23:31,513 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-13 23:23:31,950 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-13 23:23:32,614 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2020-10-13 23:23:34,711 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-13 23:23:35,021 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 34 [2020-10-13 23:23:35,782 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-13 23:23:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:38,807 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2020-10-13 23:23:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-13 23:23:38,808 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 66 [2020-10-13 23:23:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:38,812 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:23:38,812 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 23:23:38,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=823, Invalid=9077, Unknown=0, NotChecked=0, Total=9900 [2020-10-13 23:23:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 23:23:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 114. [2020-10-13 23:23:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:23:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-10-13 23:23:38,832 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 66 [2020-10-13 23:23:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:38,833 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-10-13 23:23:38,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 23:23:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-10-13 23:23:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:23:38,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:38,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:23:38,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:23:38,835 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash -739200681, now seen corresponding path program 6 times [2020-10-13 23:23:38,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:38,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163909310] [2020-10-13 23:23:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:38,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:38,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:43,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:23:43,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:43,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:23:43,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:43,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:23:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:23:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:23:43,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:43,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:43,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:43,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:43,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:43,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:43,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:43,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:23:43,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163909310] [2020-10-13 23:23:43,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:43,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:23:43,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159594222] [2020-10-13 23:23:43,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:23:43,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:23:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:43,968 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 12 states. [2020-10-13 23:23:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:44,899 INFO L93 Difference]: Finished difference Result 197 states and 222 transitions. [2020-10-13 23:23:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:23:44,899 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 23:23:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:44,901 INFO L225 Difference]: With dead ends: 197 [2020-10-13 23:23:44,901 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:23:44,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:23:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:23:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2020-10-13 23:23:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 23:23:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2020-10-13 23:23:44,918 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 68 [2020-10-13 23:23:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:44,919 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2020-10-13 23:23:44,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:23:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2020-10-13 23:23:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:23:44,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:44,920 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:23:44,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:23:44,921 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 148971543, now seen corresponding path program 7 times [2020-10-13 23:23:44,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:44,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574630640] [2020-10-13 23:23:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:44,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:44,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:45,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:49,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:49,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:23:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:49,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:23:49,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:50,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:50,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:50,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:50,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:50,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:50,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:50,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:50,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:23:50,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574630640] [2020-10-13 23:23:50,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:50,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:23:50,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284399720] [2020-10-13 23:23:50,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:23:50,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:23:50,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:23:50,063 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 12 states. [2020-10-13 23:23:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:50,621 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-10-13 23:23:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:23:50,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 23:23:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:50,623 INFO L225 Difference]: With dead ends: 195 [2020-10-13 23:23:50,623 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:23:50,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:23:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:23:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-13 23:23:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:23:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-13 23:23:50,634 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 68 [2020-10-13 23:23:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:50,634 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-13 23:23:50,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:23:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-13 23:23:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:23:50,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:50,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:23:50,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:23:50,636 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1601457803, now seen corresponding path program 8 times [2020-10-13 23:23:50,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:50,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827405519] [2020-10-13 23:23:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:50,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:51,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:54,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:55,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:55,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:23:55,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:23:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:02,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:02,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:02,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:02,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:02,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:24:02,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827405519] [2020-10-13 23:24:02,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:02,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 23:24:02,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241356023] [2020-10-13 23:24:02,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 23:24:02,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 23:24:02,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:24:02,180 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 59 states. [2020-10-13 23:24:02,538 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-13 23:24:04,021 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-13 23:24:05,926 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-13 23:24:06,165 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-13 23:24:06,828 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-13 23:24:07,150 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-13 23:24:07,542 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 23:24:08,445 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 23:24:08,972 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-13 23:24:09,799 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 38 [2020-10-13 23:24:10,443 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 39 [2020-10-13 23:24:11,895 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-13 23:24:12,390 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 23:24:12,834 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 23:24:13,262 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 23:24:14,136 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-13 23:24:14,608 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 45 [2020-10-13 23:24:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:16,609 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2020-10-13 23:24:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-13 23:24:16,609 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 80 [2020-10-13 23:24:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:16,615 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:24:16,615 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:24:16,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=648, Invalid=8282, Unknown=0, NotChecked=0, Total=8930 [2020-10-13 23:24:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:24:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2020-10-13 23:24:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:24:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2020-10-13 23:24:16,638 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 80 [2020-10-13 23:24:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:16,638 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2020-10-13 23:24:16,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 23:24:16,638 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2020-10-13 23:24:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:24:16,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:16,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:24:16,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:24:16,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1878970583, now seen corresponding path program 9 times [2020-10-13 23:24:16,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:16,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494909568] [2020-10-13 23:24:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:16,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:16,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:21,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:24:21,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:24:21,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:24:21,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:21,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:21,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:21,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:24:21,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494909568] [2020-10-13 23:24:21,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:21,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:24:21,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854759693] [2020-10-13 23:24:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:24:21,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:24:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:24:21,828 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand 14 states. [2020-10-13 23:24:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:22,745 INFO L93 Difference]: Finished difference Result 311 states and 342 transitions. [2020-10-13 23:24:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:24:22,746 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-13 23:24:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:22,748 INFO L225 Difference]: With dead ends: 311 [2020-10-13 23:24:22,748 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:24:22,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:24:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:24:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2020-10-13 23:24:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-13 23:24:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2020-10-13 23:24:22,767 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 82 [2020-10-13 23:24:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:22,767 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2020-10-13 23:24:22,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:24:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2020-10-13 23:24:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:24:22,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:22,769 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:24:22,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:24:22,769 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1121582935, now seen corresponding path program 10 times [2020-10-13 23:24:22,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:22,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249172919] [2020-10-13 23:24:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:22,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:24:27,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:24:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:24:27,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:27,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:24:27,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:27,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:24:27,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:27,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:27,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:27,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:27,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:27,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:27,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:24:27,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:27,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:27,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:27,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:27,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:24:27,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249172919] [2020-10-13 23:24:27,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:27,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:24:27,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869364227] [2020-10-13 23:24:27,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:24:27,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:24:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:24:27,981 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 14 states. [2020-10-13 23:24:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:28,975 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2020-10-13 23:24:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:24:28,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-13 23:24:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:28,977 INFO L225 Difference]: With dead ends: 150 [2020-10-13 23:24:28,977 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:24:28,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:24:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:24:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 23:24:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:24:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-13 23:24:28,987 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 82 [2020-10-13 23:24:28,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:28,987 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-13 23:24:28,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:24:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-13 23:24:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:24:28,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:28,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:24:28,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:24:28,989 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:28,989 INFO L82 PathProgramCache]: Analyzing trace with hash 939578013, now seen corresponding path program 11 times [2020-10-13 23:24:28,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:28,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334686147] [2020-10-13 23:24:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:30,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:34,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:34,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:24:34,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:24:34,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:24:34,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:34,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-13 23:24:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:34,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 23:24:34,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:36,845 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 23:24:37,306 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-13 23:24:39,570 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-13 23:24:39,804 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 23:24:40,043 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-13 23:24:40,596 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-13 23:24:40,905 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-13 23:24:41,196 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-13 23:24:41,661 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-13 23:24:41,992 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-13 23:24:42,279 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 23:24:42,571 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 23:24:42,869 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2020-10-13 23:24:43,142 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-13 23:24:43,754 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-13 23:24:44,113 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-13 23:24:44,455 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-13 23:24:44,734 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 23:24:45,078 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-13 23:24:45,452 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-13 23:24:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:48,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:48,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:48,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:48,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:48,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:48,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:24:48,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334686147] [2020-10-13 23:24:48,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:48,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 23:24:48,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52047732] [2020-10-13 23:24:48,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 23:24:48,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 23:24:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4614, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:24:48,884 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 71 states. [2020-10-13 23:24:49,708 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 18 [2020-10-13 23:24:50,742 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 68 [2020-10-13 23:24:51,647 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2020-10-13 23:24:54,380 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 88 [2020-10-13 23:24:55,379 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 79 [2020-10-13 23:24:56,423 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 93 [2020-10-13 23:24:57,351 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 90 [2020-10-13 23:24:58,677 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 93 [2020-10-13 23:25:00,267 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 89 [2020-10-13 23:25:01,097 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2020-10-13 23:25:01,754 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2020-10-13 23:25:02,184 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-13 23:25:02,793 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-13 23:25:03,314 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-13 23:25:03,769 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 23:25:04,285 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-13 23:25:05,207 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-13 23:25:05,706 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-13 23:25:06,243 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 23:25:07,472 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2020-10-13 23:25:07,952 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-13 23:25:08,853 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-10-13 23:25:09,734 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2020-10-13 23:25:10,399 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 23:25:11,020 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-13 23:25:12,185 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 94 [2020-10-13 23:25:12,596 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 23:25:13,139 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-13 23:25:14,035 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-13 23:25:14,532 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-10-13 23:25:15,980 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-13 23:25:17,767 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-10-13 23:25:18,739 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-13 23:25:19,576 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-13 23:25:20,160 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-13 23:25:20,949 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-13 23:25:22,953 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 90 [2020-10-13 23:25:23,461 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-13 23:25:24,173 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-13 23:25:24,835 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-13 23:25:25,399 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-13 23:25:25,913 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-13 23:25:26,605 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2020-10-13 23:25:27,148 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-13 23:25:27,876 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-13 23:25:28,475 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:25:29,439 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 48 [2020-10-13 23:25:29,964 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2020-10-13 23:25:30,853 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2020-10-13 23:25:31,404 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-13 23:25:32,201 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2020-10-13 23:25:32,710 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2020-10-13 23:25:33,496 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 23:25:34,530 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 80 [2020-10-13 23:25:35,090 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 23:25:36,739 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 87 [2020-10-13 23:25:37,768 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 77 [2020-10-13 23:25:39,540 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 176 DAG size of output: 84 [2020-10-13 23:25:41,409 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 187 DAG size of output: 75 [2020-10-13 23:25:43,685 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 73 [2020-10-13 23:25:44,257 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-13 23:25:44,914 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-13 23:25:45,701 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 23:25:46,428 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-13 23:25:48,086 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-10-13 23:25:49,743 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2020-10-13 23:25:51,282 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2020-10-13 23:25:52,467 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2020-10-13 23:25:53,978 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2020-10-13 23:25:55,528 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2020-10-13 23:25:58,299 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-13 23:26:00,520 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-10-13 23:26:02,245 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-13 23:26:04,094 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 23:26:05,496 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-13 23:26:06,801 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-13 23:26:08,396 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-13 23:26:09,822 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-13 23:26:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:26:13,690 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2020-10-13 23:26:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-13 23:26:13,694 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2020-10-13 23:26:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:26:13,697 INFO L225 Difference]: With dead ends: 250 [2020-10-13 23:26:13,698 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:26:13,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6712 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=2086, Invalid=24974, Unknown=0, NotChecked=0, Total=27060 [2020-10-13 23:26:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:26:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2020-10-13 23:26:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:26:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-13 23:26:13,728 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 94 [2020-10-13 23:26:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:26:13,729 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-13 23:26:13,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 23:26:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-13 23:26:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:26:13,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:26:13,731 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 23:26:13,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:26:13,731 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:26:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:26:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash -873470085, now seen corresponding path program 12 times [2020-10-13 23:26:13,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:26:13,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830958830] [2020-10-13 23:26:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:26:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:26:13,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:26:13,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking...