/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:43:47,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:43:47,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:43:48,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:43:48,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:43:48,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:43:48,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:43:48,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:43:48,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:43:48,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:43:48,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:43:48,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:43:48,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:43:48,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:43:48,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:43:48,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:43:48,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:43:48,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:43:48,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:43:48,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:43:48,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:43:48,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:43:48,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:43:48,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:43:48,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:43:48,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:43:48,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:43:48,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:43:48,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:43:48,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:43:48,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:43:48,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:43:48,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:43:48,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:43:48,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:43:48,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:43:48,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:43:48,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:43:48,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:43:48,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:43:48,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:43:48,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 17:43:48,077 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:43:48,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:43:48,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:43:48,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:43:48,079 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:43:48,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:43:48,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:43:48,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:43:48,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:43:48,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:43:48,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:43:48,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:43:48,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:43:48,081 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:43:48,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:43:48,082 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:43:48,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:43:48,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:43:48,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:43:48,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:43:48,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:43:48,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:48,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:43:48,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:43:48,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:43:48,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:43:48,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:43:48,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:43:48,085 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:43:48,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:43:48,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:43:48,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:43:48,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:43:48,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:43:48,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:43:48,452 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-14 17:43:48,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7399bff38/5d621fb9217c4c078f7e037dccc1a472/FLAGe33f89c37 [2020-10-14 17:43:49,140 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:43:49,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2020-10-14 17:43:49,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7399bff38/5d621fb9217c4c078f7e037dccc1a472/FLAGe33f89c37 [2020-10-14 17:43:49,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7399bff38/5d621fb9217c4c078f7e037dccc1a472 [2020-10-14 17:43:49,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:43:49,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:43:49,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:49,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:43:49,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:43:49,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4187f794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49, skipping insertion in model container [2020-10-14 17:43:49,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:43:49,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:43:49,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:49,779 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:43:49,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:43:49,929 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:43:49,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49 WrapperNode [2020-10-14 17:43:49,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:43:49,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:43:49,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:43:49,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:43:49,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... [2020-10-14 17:43:49,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:43:49,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:43:49,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:43:49,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:43:49,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:43:50,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:43:50,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:43:50,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 17:43:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:43:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:43:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:43:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 17:43:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 17:43:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:43:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-14 17:43:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:43:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:43:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:43:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:43:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:43:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:43:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:43:50,477 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:43:50,478 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-14 17:43:50,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:50 BoogieIcfgContainer [2020-10-14 17:43:50,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:43:50,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:43:50,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:43:50,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:43:50,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:43:49" (1/3) ... [2020-10-14 17:43:50,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6dee2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:50, skipping insertion in model container [2020-10-14 17:43:50,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:43:49" (2/3) ... [2020-10-14 17:43:50,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6dee2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:43:50, skipping insertion in model container [2020-10-14 17:43:50,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:43:50" (3/3) ... [2020-10-14 17:43:50,494 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2020-10-14 17:43:50,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:43:50,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:43:50,534 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:43:50,564 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:43:50,564 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:43:50,564 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:43:50,564 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:43:50,564 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:43:50,565 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:43:50,565 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:43:50,565 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:43:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-14 17:43:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 17:43:50,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:50,602 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] [2020-10-14 17:43:50,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1372119815, now seen corresponding path program 1 times [2020-10-14 17:43:50,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:50,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409567080] [2020-10-14 17:43:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:50,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:50,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:51,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:54,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 17:43:54,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 17:43:54,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3649 [2020-10-14 17:43:54,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:54,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:54,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:43:54,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:43:54,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 17:43:54,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 17:43:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:43:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:54,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:43:54,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:43:54,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:43:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 17:43:54,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:43:54,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:43:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:43:54,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:43:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:43:54,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:43:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:43:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409567080] [2020-10-14 17:43:54,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:43:54,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 17:43:54,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945442386] [2020-10-14 17:43:54,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:43:54,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:43:54,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:43:54,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:43:54,642 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2020-10-14 17:43:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:43:54,910 INFO L93 Difference]: Finished difference Result 107 states and 161 transitions. [2020-10-14 17:43:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:43:54,912 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 17:43:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:43:54,921 INFO L225 Difference]: With dead ends: 107 [2020-10-14 17:43:54,921 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 17:43:54,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 17:43:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 17:43:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 17:43:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 17:43:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2020-10-14 17:43:54,969 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2020-10-14 17:43:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:43:54,970 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2020-10-14 17:43:54,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:43:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2020-10-14 17:43:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 17:43:54,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:43:54,972 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] [2020-10-14 17:43:54,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:43:54,973 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:43:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:43:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash 461345715, now seen corresponding path program 1 times [2020-10-14 17:43:54,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:43:54,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103876331] [2020-10-14 17:43:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:43:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:43:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:55,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:43:58,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:00,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 17:44:00,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 17:44:00,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 17:44:00,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:00,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:44:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:44:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 17:44:00,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:00,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:00,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:00,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:00,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:44:00,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:00,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:00,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 17:44:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 17:44:00,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103876331] [2020-10-14 17:44:00,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:44:00,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 17:44:00,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185388450] [2020-10-14 17:44:00,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:44:00,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:44:00,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:44:00,106 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 5 states. [2020-10-14 17:44:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:00,361 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2020-10-14 17:44:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:44:00,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-14 17:44:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:00,364 INFO L225 Difference]: With dead ends: 93 [2020-10-14 17:44:00,364 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 17:44:00,367 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 [2020-10-14 17:44:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 17:44:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-14 17:44:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:44:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-14 17:44:00,384 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 30 [2020-10-14 17:44:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:00,385 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-14 17:44:00,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:44:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-14 17:44:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 17:44:00,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:00,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:00,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:44:00,389 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -241487771, now seen corresponding path program 1 times [2020-10-14 17:44:00,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:00,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210961328] [2020-10-14 17:44:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:00,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:00,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:05,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 17:44:05,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 17:44:05,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:44:05,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:05,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:44:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:05,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:44:05,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:05,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:05,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:05,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:05,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:05,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:05,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:05,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:05,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:05,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:05,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:05,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 17:44:05,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210961328] [2020-10-14 17:44:05,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:05,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:44:05,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427487517] [2020-10-14 17:44:05,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:44:05,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:44:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:44:05,524 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 6 states. [2020-10-14 17:44:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:05,843 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2020-10-14 17:44:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 17:44:05,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-14 17:44:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:05,846 INFO L225 Difference]: With dead ends: 95 [2020-10-14 17:44:05,846 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 17:44:05,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 17:44:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 17:44:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 17:44:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 17:44:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-14 17:44:05,868 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 44 [2020-10-14 17:44:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:05,869 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-14 17:44:05,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:44:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-14 17:44:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 17:44:05,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:05,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:05,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:44:05,875 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1410773163, now seen corresponding path program 2 times [2020-10-14 17:44:05,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:05,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476233023] [2020-10-14 17:44:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:06,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:07,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:09,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:10,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:11,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:11,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 17:44:11,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 17:44:11,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5400 [2020-10-14 17:44:11,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:11,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 17:44:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:11,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 17:44:11,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:14,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:14,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:14,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:14,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 17:44:14,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:14,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:14,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:14,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:14,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476233023] [2020-10-14 17:44:14,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:14,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 17:44:14,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567557186] [2020-10-14 17:44:14,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 17:44:14,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 17:44:14,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 17:44:14,241 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 40 states. [2020-10-14 17:44:14,577 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-14 17:44:15,186 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-14 17:44:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:18,434 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-10-14 17:44:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 17:44:18,435 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 60 [2020-10-14 17:44:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:18,437 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:44:18,439 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 17:44:18,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=235, Invalid=3547, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 17:44:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 17:44:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-14 17:44:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 17:44:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-14 17:44:18,469 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 60 [2020-10-14 17:44:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:18,470 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-14 17:44:18,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 17:44:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-14 17:44:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:44:18,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:18,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:18,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:44:18,474 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2059159149, now seen corresponding path program 3 times [2020-10-14 17:44:18,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:18,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040251126] [2020-10-14 17:44:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:18,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:18,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:23,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:44:23,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:44:23,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:44:23,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:23,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 17:44:23,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:44:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:23,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:23,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:23,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:23,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:23,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:23,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:23,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:23,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:23,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:23,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 17:44:23,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040251126] [2020-10-14 17:44:23,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:23,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:23,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789808639] [2020-10-14 17:44:23,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:23,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:23,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:23,589 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 10 states. [2020-10-14 17:44:24,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:24,276 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2020-10-14 17:44:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:44:24,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-14 17:44:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:24,283 INFO L225 Difference]: With dead ends: 161 [2020-10-14 17:44:24,284 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 17:44:24,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 17:44:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2020-10-14 17:44:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 17:44:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2020-10-14 17:44:24,299 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 62 [2020-10-14 17:44:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:24,300 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2020-10-14 17:44:24,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2020-10-14 17:44:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 17:44:24,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:24,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:44:24,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:44:24,302 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1821157229, now seen corresponding path program 4 times [2020-10-14 17:44:24,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:24,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826879040] [2020-10-14 17:44:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 17:44:29,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:29,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:44:29,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:44:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:29,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:29,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 17:44:29,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826879040] [2020-10-14 17:44:29,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:29,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:44:29,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341328035] [2020-10-14 17:44:29,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:44:29,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:29,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:44:29,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:44:29,426 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand 10 states. [2020-10-14 17:44:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:29,892 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2020-10-14 17:44:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:44:29,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-14 17:44:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:29,895 INFO L225 Difference]: With dead ends: 183 [2020-10-14 17:44:29,895 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 17:44:29,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:44:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 17:44:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2020-10-14 17:44:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 17:44:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-14 17:44:29,907 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 62 [2020-10-14 17:44:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:29,907 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-14 17:44:29,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:44:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-14 17:44:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 17:44:29,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:29,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2020-10-14 17:44:29,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:44:29,910 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1607840187, now seen corresponding path program 5 times [2020-10-14 17:44:29,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:29,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878633348] [2020-10-14 17:44:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:29,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:30,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:32,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:34,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 17:44:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:44:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 17:44:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:39,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:39,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:39,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:39,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:39,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:39,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:39,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:39,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:39,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:39,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:39,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:44:39,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878633348] [2020-10-14 17:44:39,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:39,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 17:44:39,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333785794] [2020-10-14 17:44:39,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 17:44:39,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 17:44:39,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2246, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 17:44:39,996 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 49 states. [2020-10-14 17:44:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:43,353 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2020-10-14 17:44:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 17:44:43,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 76 [2020-10-14 17:44:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:43,356 INFO L225 Difference]: With dead ends: 143 [2020-10-14 17:44:43,356 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 17:44:43,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=116, Invalid=2434, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 17:44:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 17:44:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-10-14 17:44:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 17:44:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2020-10-14 17:44:43,375 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 76 [2020-10-14 17:44:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:43,375 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2020-10-14 17:44:43,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 17:44:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2020-10-14 17:44:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:44:43,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:43,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-14 17:44:43,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:44:43,378 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2001593213, now seen corresponding path program 6 times [2020-10-14 17:44:43,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:43,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397183134] [2020-10-14 17:44:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:43,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:43,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:48,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:44:48,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:44:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:44:48,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:48,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:48,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:48,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:48,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:48,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:48,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-14 17:44:48,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397183134] [2020-10-14 17:44:48,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:48,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:48,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54306720] [2020-10-14 17:44:48,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:48,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:48,498 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand 12 states. [2020-10-14 17:44:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:49,092 INFO L93 Difference]: Finished difference Result 266 states and 299 transitions. [2020-10-14 17:44:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:44:49,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-14 17:44:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:49,095 INFO L225 Difference]: With dead ends: 266 [2020-10-14 17:44:49,095 INFO L226 Difference]: Without dead ends: 155 [2020-10-14 17:44:49,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:44:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-14 17:44:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-10-14 17:44:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 17:44:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2020-10-14 17:44:49,115 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 78 [2020-10-14 17:44:49,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:49,116 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2020-10-14 17:44:49,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2020-10-14 17:44:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 17:44:49,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:49,118 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-14 17:44:49,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:44:49,118 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:49,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1161743683, now seen corresponding path program 7 times [2020-10-14 17:44:49,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:49,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566340052] [2020-10-14 17:44:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:49,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:49,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:44:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:44:54,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:44:54,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:44:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:44:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:54,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:54,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:44:54,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:44:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:44:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:44:54,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:44:54,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:44:54,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:44:54,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:44:54,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:44:54,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:44:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-14 17:44:54,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566340052] [2020-10-14 17:44:54,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:44:54,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:44:54,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575287243] [2020-10-14 17:44:54,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:44:54,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:44:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:44:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:44:54,258 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 12 states. [2020-10-14 17:44:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:44:55,029 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2020-10-14 17:44:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:44:55,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-14 17:44:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:44:55,030 INFO L225 Difference]: With dead ends: 147 [2020-10-14 17:44:55,030 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 17:44:55,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:44:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 17:44:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-14 17:44:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 17:44:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2020-10-14 17:44:55,055 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 78 [2020-10-14 17:44:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:44:55,056 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2020-10-14 17:44:55,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:44:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2020-10-14 17:44:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 17:44:55,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:44:55,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2020-10-14 17:44:55,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:44:55,058 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:44:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:44:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2145266997, now seen corresponding path program 8 times [2020-10-14 17:44:55,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:44:55,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470832116] [2020-10-14 17:44:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:44:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:44:55,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:57,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:44:59,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:00,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5385 [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:00,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 17:45:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:45:00,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 17:45:00,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:08,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:08,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:08,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:08,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:08,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:45:08,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:08,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:08,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:08,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:45:08,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470832116] [2020-10-14 17:45:08,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:08,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 17:45:08,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571718525] [2020-10-14 17:45:08,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 17:45:08,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 17:45:08,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=4409, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 17:45:08,523 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand 68 states. [2020-10-14 17:45:14,081 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-14 17:45:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:22,436 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2020-10-14 17:45:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-14 17:45:22,437 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 92 [2020-10-14 17:45:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:22,440 INFO L225 Difference]: With dead ends: 172 [2020-10-14 17:45:22,440 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 17:45:22,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=406, Invalid=11366, Unknown=0, NotChecked=0, Total=11772 [2020-10-14 17:45:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 17:45:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2020-10-14 17:45:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 17:45:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 174 transitions. [2020-10-14 17:45:22,458 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 174 transitions. Word has length 92 [2020-10-14 17:45:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:22,458 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 174 transitions. [2020-10-14 17:45:22,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 17:45:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 174 transitions. [2020-10-14 17:45:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 17:45:22,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:22,461 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-14 17:45:22,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:45:22,461 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2077450099, now seen corresponding path program 9 times [2020-10-14 17:45:22,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:22,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704496746] [2020-10-14 17:45:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:22,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:27,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 17:45:27,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:45:27,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:27,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:27,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:27,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:27,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:27,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:45:27,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:27,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:27,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:27,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:45:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 17:45:27,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704496746] [2020-10-14 17:45:27,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:27,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:27,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748893429] [2020-10-14 17:45:27,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:27,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:27,663 INFO L87 Difference]: Start difference. First operand 159 states and 174 transitions. Second operand 14 states. [2020-10-14 17:45:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:29,328 INFO L93 Difference]: Finished difference Result 245 states and 272 transitions. [2020-10-14 17:45:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:45:29,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-14 17:45:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:29,330 INFO L225 Difference]: With dead ends: 245 [2020-10-14 17:45:29,330 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 17:45:29,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:45:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 17:45:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 161. [2020-10-14 17:45:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 17:45:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 175 transitions. [2020-10-14 17:45:29,342 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 175 transitions. Word has length 94 [2020-10-14 17:45:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:29,343 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 175 transitions. [2020-10-14 17:45:29,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 175 transitions. [2020-10-14 17:45:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 17:45:29,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:29,345 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-14 17:45:29,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:45:29,345 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:29,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1034436211, now seen corresponding path program 10 times [2020-10-14 17:45:29,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:29,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328634108] [2020-10-14 17:45:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:29,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:32,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:34,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 17:45:34,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 17:45:34,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:45:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:34,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:45:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:34,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:34,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:45:34,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:45:34,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:45:34,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:34,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:34,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:45:34,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:45:34,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:45:34,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 17:45:34,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328634108] [2020-10-14 17:45:34,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:45:34,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:45:34,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574876257] [2020-10-14 17:45:34,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:45:34,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:45:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:45:34,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:45:34,523 INFO L87 Difference]: Start difference. First operand 161 states and 175 transitions. Second operand 14 states. [2020-10-14 17:45:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:45:35,401 INFO L93 Difference]: Finished difference Result 267 states and 288 transitions. [2020-10-14 17:45:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:45:35,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-14 17:45:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:45:35,404 INFO L225 Difference]: With dead ends: 267 [2020-10-14 17:45:35,404 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 17:45:35,405 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 [2020-10-14 17:45:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 17:45:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2020-10-14 17:45:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 17:45:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-14 17:45:35,414 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 94 [2020-10-14 17:45:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:45:35,414 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-14 17:45:35,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:45:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-14 17:45:35,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 17:45:35,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:45:35,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2020-10-14 17:45:35,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:45:35,417 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:45:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:45:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash 8711205, now seen corresponding path program 11 times [2020-10-14 17:45:35,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:45:35,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472880420] [2020-10-14 17:45:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:45:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:45:35,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:35,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:37,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:45:40,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:45:40,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 17:45:40,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:45:40,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-14 17:45:40,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:45:41,418 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2020-10-14 17:45:43,674 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-14 17:45:46,864 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-14 17:45:48,455 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-14 17:45:48,794 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-14 17:45:49,133 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-14 17:45:49,455 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-14 17:45:49,738 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-14 17:45:50,098 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-14 17:45:50,948 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2020-10-14 17:45:51,270 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-14 17:45:51,591 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-14 17:45:51,937 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-14 17:45:54,686 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-14 17:45:55,077 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-14 17:45:55,438 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-14 17:45:55,810 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-14 17:45:56,219 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-14 17:45:56,626 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2020-10-14 17:45:57,005 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-14 17:46:00,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:46:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:46:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:46:00,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:46:00,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:46:00,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:46:00,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:46:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:46:00,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472880420] [2020-10-14 17:46:00,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:46:00,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-14 17:46:00,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140079315] [2020-10-14 17:46:00,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-14 17:46:00,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:46:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-14 17:46:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=7308, Unknown=0, NotChecked=0, Total=7656 [2020-10-14 17:46:00,513 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 88 states. [2020-10-14 17:46:02,751 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 43 [2020-10-14 17:46:04,687 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 71 [2020-10-14 17:46:06,743 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 95 [2020-10-14 17:46:07,551 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 86 [2020-10-14 17:46:08,277 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 70 [2020-10-14 17:46:09,287 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 50 [2020-10-14 17:46:09,963 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 75 [2020-10-14 17:46:10,833 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 78 [2020-10-14 17:46:11,774 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 107 [2020-10-14 17:46:12,728 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88 [2020-10-14 17:46:13,155 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-14 17:46:13,775 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 17:46:14,699 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-14 17:46:15,541 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 17:46:16,426 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-14 17:46:16,879 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-14 17:46:18,305 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-14 17:46:18,689 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-14 17:46:19,317 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 47 [2020-10-14 17:46:20,199 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 88 [2020-10-14 17:46:20,920 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 44 [2020-10-14 17:46:22,521 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-14 17:46:23,248 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-14 17:46:23,850 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-14 17:46:24,409 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 43 [2020-10-14 17:46:24,910 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-14 17:46:25,453 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 43 [2020-10-14 17:46:25,917 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-10-14 17:46:26,887 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 99 [2020-10-14 17:46:27,525 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 40 [2020-10-14 17:46:28,471 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 91 [2020-10-14 17:46:29,085 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 38 [2020-10-14 17:46:29,864 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 76 [2020-10-14 17:46:30,856 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 77 [2020-10-14 17:46:32,042 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2020-10-14 17:46:32,872 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2020-10-14 17:46:33,702 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2020-10-14 17:46:34,506 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-14 17:46:35,252 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-14 17:46:36,071 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-14 17:46:36,827 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2020-10-14 17:46:37,604 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-14 17:46:38,697 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-10-14 17:46:39,827 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-14 17:46:40,585 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 17:46:41,590 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 76 [2020-10-14 17:46:42,389 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 42 [2020-10-14 17:46:43,133 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 39 [2020-10-14 17:46:44,612 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2020-10-14 17:46:46,198 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2020-10-14 17:46:47,336 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2020-10-14 17:46:48,177 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-14 17:46:48,872 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-14 17:46:49,604 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-14 17:46:50,409 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2020-10-14 17:46:51,622 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 91 [2020-10-14 17:46:52,680 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 65 [2020-10-14 17:46:53,983 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 35 [2020-10-14 17:46:55,490 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-14 17:46:56,661 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-14 17:47:00,485 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2020-10-14 17:47:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:02,677 INFO L93 Difference]: Finished difference Result 271 states and 292 transitions. [2020-10-14 17:47:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-14 17:47:02,680 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 108 [2020-10-14 17:47:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:02,681 INFO L225 Difference]: With dead ends: 271 [2020-10-14 17:47:02,682 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 17:47:02,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=1592, Invalid=23530, Unknown=0, NotChecked=0, Total=25122 [2020-10-14 17:47:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 17:47:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2020-10-14 17:47:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 17:47:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 199 transitions. [2020-10-14 17:47:02,704 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 199 transitions. Word has length 108 [2020-10-14 17:47:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:02,704 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 199 transitions. [2020-10-14 17:47:02,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-14 17:47:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 199 transitions. [2020-10-14 17:47:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 17:47:02,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:02,706 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2020-10-14 17:47:02,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:47:02,707 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash -802717085, now seen corresponding path program 12 times [2020-10-14 17:47:02,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:02,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035726464] [2020-10-14 17:47:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:02,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:02,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:07,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:07,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 17:47:07,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:47:07,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:47:07,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:08,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:08,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-14 17:47:08,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035726464] [2020-10-14 17:47:08,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:08,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:08,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135704398] [2020-10-14 17:47:08,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:08,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:08,019 INFO L87 Difference]: Start difference. First operand 187 states and 199 transitions. Second operand 16 states. [2020-10-14 17:47:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:09,729 INFO L93 Difference]: Finished difference Result 374 states and 404 transitions. [2020-10-14 17:47:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:47:09,731 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-10-14 17:47:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:09,733 INFO L225 Difference]: With dead ends: 374 [2020-10-14 17:47:09,733 INFO L226 Difference]: Without dead ends: 211 [2020-10-14 17:47:09,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:47:09,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-14 17:47:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 196. [2020-10-14 17:47:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 17:47:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 210 transitions. [2020-10-14 17:47:09,749 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 210 transitions. Word has length 110 [2020-10-14 17:47:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:09,749 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 210 transitions. [2020-10-14 17:47:09,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 210 transitions. [2020-10-14 17:47:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 17:47:09,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:09,750 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2020-10-14 17:47:09,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:47:09,750 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1613624099, now seen corresponding path program 13 times [2020-10-14 17:47:09,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:09,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042959925] [2020-10-14 17:47:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:09,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:09,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:10,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:14,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:47:14,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 17:47:14,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:47:14,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:15,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:47:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:15,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:47:15,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:47:15,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:47:15,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-14 17:47:15,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042959925] [2020-10-14 17:47:15,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:47:15,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:47:15,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801895017] [2020-10-14 17:47:15,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:47:15,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:47:15,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:47:15,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:47:15,070 INFO L87 Difference]: Start difference. First operand 196 states and 210 transitions. Second operand 16 states. [2020-10-14 17:47:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:47:17,016 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2020-10-14 17:47:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:47:17,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-10-14 17:47:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:47:17,020 INFO L225 Difference]: With dead ends: 203 [2020-10-14 17:47:17,020 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 17:47:17,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:47:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 17:47:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-14 17:47:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 17:47:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-10-14 17:47:17,030 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 110 [2020-10-14 17:47:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:47:17,030 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-10-14 17:47:17,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:47:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-10-14 17:47:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 17:47:17,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:47:17,032 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:47:17,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:47:17,032 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:47:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:47:17,032 INFO L82 PathProgramCache]: Analyzing trace with hash -610366699, now seen corresponding path program 14 times [2020-10-14 17:47:17,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:47:17,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054755052] [2020-10-14 17:47:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:47:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:47:17,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:17,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:19,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:47:22,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:47:22,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 17:47:22,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:47:22,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 17:47:22,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:47:22,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:47:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-14 17:47:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 17:47:22,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-14 17:47:22,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:47:26,258 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-14 17:47:31,040 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-14 17:47:31,543 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51