/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-fpi/brs3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:08:10,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:08:10,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:08:10,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:08:10,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:08:10,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:08:10,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:08:10,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:08:10,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:08:10,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:08:10,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:08:10,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:08:10,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:08:10,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:08:10,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:08:10,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:08:10,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:08:10,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:08:10,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:08:10,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:08:10,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:08:10,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:08:10,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:08:10,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:08:10,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:08:10,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:08:10,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:08:10,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:08:10,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:08:10,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:08:10,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:08:10,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:08:10,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:08:10,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:08:10,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:08:10,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:08:10,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:08:10,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:08:10,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:08:10,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:08:10,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:08:10,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:08:10,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:08:10,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:08:10,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:08:10,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:08:10,596 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:08:10,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:08:10,596 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:08:10,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:08:10,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:08:10,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:08:10,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:08:10,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:08:10,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:08:10,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:08:10,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:08:10,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:08:10,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:08:10,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:08:10,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:08:10,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:08:10,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:08:10,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:08:10,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:08:10,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:08:10,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:08:10,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:08:10,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:08:10,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:08:10,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:08:10,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:08:10,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:08:10,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:08:10,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:08:10,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:08:10,951 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:08:10,952 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3.c [2020-10-14 18:08:11,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5e2bd085/a8209465019646d3b543e4e15e3f8827/FLAG8b64e8628 [2020-10-14 18:08:11,446 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:08:11,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3.c [2020-10-14 18:08:11,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5e2bd085/a8209465019646d3b543e4e15e3f8827/FLAG8b64e8628 [2020-10-14 18:08:11,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5e2bd085/a8209465019646d3b543e4e15e3f8827 [2020-10-14 18:08:11,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:08:11,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:08:11,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:11,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:08:11,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:08:11,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:11" (1/1) ... [2020-10-14 18:08:11,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee34ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:11, skipping insertion in model container [2020-10-14 18:08:11,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:11" (1/1) ... [2020-10-14 18:08:11,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:08:11,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:08:12,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:12,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:08:12,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:12,186 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:08:12,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12 WrapperNode [2020-10-14 18:08:12,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:12,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:08:12,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:08:12,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:08:12,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... [2020-10-14 18:08:12,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:08:12,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:08:12,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:08:12,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:08:12,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:08:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:08:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:08:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:08:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:08:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:08:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:08:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:08:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:08:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:08:12,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:08:12,665 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:08:12,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:12 BoogieIcfgContainer [2020-10-14 18:08:12,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:08:12,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:08:12,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:08:12,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:08:12,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:08:11" (1/3) ... [2020-10-14 18:08:12,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53525267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:12, skipping insertion in model container [2020-10-14 18:08:12,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:12" (2/3) ... [2020-10-14 18:08:12,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53525267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:12, skipping insertion in model container [2020-10-14 18:08:12,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:12" (3/3) ... [2020-10-14 18:08:12,679 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3.c [2020-10-14 18:08:12,692 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:08:12,700 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:08:12,716 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:08:12,751 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:08:12,751 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:08:12,751 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:08:12,752 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:08:12,752 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:08:12,752 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:08:12,752 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:08:12,752 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:08:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:08:12,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:08:12,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:12,782 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] [2020-10-14 18:08:12,783 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:12,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-14 18:08:12,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:12,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823933420] [2020-10-14 18:08:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:13,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:08:13,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-14 18:08:13,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:13,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:13,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:08:13,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:13,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:08:13,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:08:13,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:13,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:13,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:08:13,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:13,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:13,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:13,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:13,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:13,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:13,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:13,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:13,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:13,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:08:13,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 18:08:13,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:13,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:13,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:13,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:13,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:13,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823933420] [2020-10-14 18:08:13,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:13,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:08:13,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943690786] [2020-10-14 18:08:13,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:08:13,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:08:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:08:13,537 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 18:08:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:13,755 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-14 18:08:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:08:13,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:08:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:13,767 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:08:13,767 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 18:08:13,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 18:08:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 18:08:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 18:08:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:08:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 18:08:13,819 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-14 18:08:13,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:13,819 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 18:08:13,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:08:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 18:08:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:13,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:13,821 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] [2020-10-14 18:08:13,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:08:13,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-14 18:08:13,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:13,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175481036] [2020-10-14 18:08:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:14,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:14,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:14,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-14 18:08:14,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:14,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:08:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:08:14,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:14,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:14,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:14,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:14,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:14,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:14,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:14,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:14,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:14,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:14,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:14,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:14,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:14,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:14,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:14,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:14,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:14,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:14,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:14,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:14,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:08:14,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175481036] [2020-10-14 18:08:14,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:14,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:08:14,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5250508] [2020-10-14 18:08:14,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:08:14,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:08:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:08:14,474 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-14 18:08:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:14,673 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-14 18:08:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:08:14,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 18:08:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:14,675 INFO L225 Difference]: With dead ends: 37 [2020-10-14 18:08:14,675 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:08:14,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:08:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:08:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 18:08:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:08:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 18:08:14,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-14 18:08:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:14,686 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 18:08:14,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:08:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 18:08:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:14,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:14,688 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] [2020-10-14 18:08:14,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:08:14,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-14 18:08:14,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:14,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089818699] [2020-10-14 18:08:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:14,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:15,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:15,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:15,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-14 18:08:15,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:15,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:15,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:08:15,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:15,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:08:15,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:15,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:15,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:15,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:15,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:15,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:15,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:15,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:15,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:15,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:15,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:15,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:15,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:08:15,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:15,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:15,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:15,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:15,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089818699] [2020-10-14 18:08:15,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:15,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:08:15,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468751778] [2020-10-14 18:08:15,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:08:15,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:08:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:08:15,426 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-14 18:08:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:15,739 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 18:08:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:08:15,740 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 18:08:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:15,741 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:08:15,741 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:08:15,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:08:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-14 18:08:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:08:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-14 18:08:15,750 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-10-14 18:08:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:15,750 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-14 18:08:15,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:08:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-14 18:08:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:08:15,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:15,752 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:08:15,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:08:15,753 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-14 18:08:15,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:15,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105537509] [2020-10-14 18:08:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:15,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:20,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:08:20,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:08:20,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:08:20,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:20,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:20,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:20,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:08:20,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:21,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:21,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:21,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:21,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:21,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:21,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:21,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105537509] [2020-10-14 18:08:21,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:21,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:21,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127347794] [2020-10-14 18:08:21,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:21,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:21,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:21,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:21,075 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 13 states. [2020-10-14 18:08:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:21,642 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-10-14 18:08:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:08:21,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:08:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:21,643 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:08:21,644 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:08:21,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:08:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:08:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 18:08:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:08:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-14 18:08:21,652 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-10-14 18:08:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:21,652 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-14 18:08:21,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-14 18:08:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:08:21,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:21,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:21,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:08:21,655 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-14 18:08:21,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:21,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350686731] [2020-10-14 18:08:21,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:08:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:08:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:08:26,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:26,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:08:26,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 18:08:26,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:26,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:26,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:26,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:26,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:26,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:26,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:26,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:26,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350686731] [2020-10-14 18:08:26,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:26,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:26,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705666380] [2020-10-14 18:08:26,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:26,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:26,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:26,925 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2020-10-14 18:08:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:27,547 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-14 18:08:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:08:27,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 18:08:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:27,550 INFO L225 Difference]: With dead ends: 65 [2020-10-14 18:08:27,550 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 18:08:27,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:08:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 18:08:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-14 18:08:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:08:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-14 18:08:27,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 36 [2020-10-14 18:08:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:27,571 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-14 18:08:27,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-14 18:08:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:08:27,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:27,574 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:27,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:08:27,575 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:27,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 925984472, now seen corresponding path program 3 times [2020-10-14 18:08:27,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:27,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333470971] [2020-10-14 18:08:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:27,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:08:32,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:08:32,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:08:32,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:08:32,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:32,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:08:32,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:33,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:33,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:33,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:33,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:33,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:33,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:33,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:33,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:33,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:33,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:33,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:33,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:33,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:33,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:33,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:33,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:33,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:33,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:33,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:33,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333470971] [2020-10-14 18:08:33,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:33,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:08:33,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893469886] [2020-10-14 18:08:33,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:08:33,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:08:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:08:33,200 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 17 states. [2020-10-14 18:08:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:34,002 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-14 18:08:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:08:34,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-14 18:08:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:34,004 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:08:34,005 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:08:34,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:08:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:08:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-14 18:08:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:08:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-14 18:08:34,017 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2020-10-14 18:08:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:34,018 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-14 18:08:34,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:08:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-14 18:08:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:08:34,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:34,021 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:34,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:08:34,021 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:34,022 INFO L82 PathProgramCache]: Analyzing trace with hash 295677591, now seen corresponding path program 4 times [2020-10-14 18:08:34,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:34,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348579791] [2020-10-14 18:08:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:34,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:39,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:08:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:08:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:08:39,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:39,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:08:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:08:39,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:39,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:39,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:39,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:39,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 18:08:39,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:39,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:39,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:39,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:39,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:39,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:39,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:39,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:39,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:39,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:39,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:39,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:39,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:39,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:39,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348579791] [2020-10-14 18:08:39,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:39,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:08:39,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165476146] [2020-10-14 18:08:39,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:08:39,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:39,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:08:39,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:39,336 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-14 18:08:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:39,981 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-14 18:08:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:08:39,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-14 18:08:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:39,983 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:08:39,983 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:08:39,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:08:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:08:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 18:08:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:08:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-14 18:08:40,002 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-10-14 18:08:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:40,003 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-14 18:08:40,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:08:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-14 18:08:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:08:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:40,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:40,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:08:40,006 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2090673853, now seen corresponding path program 5 times [2020-10-14 18:08:40,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:40,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443898579] [2020-10-14 18:08:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:40,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:08:45,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:08:45,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:08:45,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:08:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:45,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:08:45,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:45,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:45,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:45,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:45,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:45,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:45,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:45,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:45,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:45,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:45,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443898579] [2020-10-14 18:08:45,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:45,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:08:45,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866668654] [2020-10-14 18:08:45,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:08:45,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:45,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:08:45,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:08:45,737 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 21 states. [2020-10-14 18:08:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:47,026 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-10-14 18:08:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:08:47,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-14 18:08:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:47,028 INFO L225 Difference]: With dead ends: 84 [2020-10-14 18:08:47,028 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:08:47,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:08:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:08:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-14 18:08:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 18:08:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-14 18:08:47,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-10-14 18:08:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:47,043 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-14 18:08:47,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:08:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-14 18:08:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:08:47,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:47,045 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:47,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:08:47,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1483757422, now seen corresponding path program 6 times [2020-10-14 18:08:47,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:47,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315473185] [2020-10-14 18:08:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:47,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:52,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:08:52,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:08:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:08:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:52,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:52,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:52,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:52,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:52,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:52,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315473185] [2020-10-14 18:08:52,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:52,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:08:52,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347422013] [2020-10-14 18:08:52,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:08:52,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:52,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:08:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:08:52,416 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 19 states. [2020-10-14 18:08:53,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:53,312 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-14 18:08:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:08:53,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 18:08:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:53,317 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:08:53,317 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:53,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:08:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-14 18:08:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:08:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:08:53,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 48 [2020-10-14 18:08:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:53,326 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:08:53,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:08:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:08:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:08:53,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:53,328 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:53,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:08:53,328 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:53,328 INFO L82 PathProgramCache]: Analyzing trace with hash -283081158, now seen corresponding path program 7 times [2020-10-14 18:08:53,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:53,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105149878] [2020-10-14 18:08:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:56,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:08:58,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:08:58,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:59,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:59,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:59,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:59,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:59,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:59,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:59,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:59,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:59,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:59,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:59,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:59,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:59,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105149878] [2020-10-14 18:08:59,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:59,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:08:59,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715505871] [2020-10-14 18:08:59,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:08:59,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:59,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:08:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:08:59,314 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 25 states. [2020-10-14 18:09:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:00,871 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-14 18:09:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:09:00,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-14 18:09:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:00,874 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:09:00,874 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:09:00,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:09:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:09:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-14 18:09:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 18:09:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-14 18:09:00,889 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 51 [2020-10-14 18:09:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:00,890 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-14 18:09:00,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:09:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-14 18:09:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:09:00,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:00,891 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:00,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:09:00,892 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1382761483, now seen corresponding path program 8 times [2020-10-14 18:09:00,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:00,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343419213] [2020-10-14 18:09:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:00,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:05,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:09:05,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:06,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:06,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:06,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:06,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:06,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:06,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:06,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:06,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:06,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:06,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:06,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:06,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:06,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343419213] [2020-10-14 18:09:06,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:06,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:09:06,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481729839] [2020-10-14 18:09:06,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:09:06,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:09:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:09:06,184 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2020-10-14 18:09:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:07,357 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2020-10-14 18:09:07,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:09:07,358 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-14 18:09:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:07,359 INFO L225 Difference]: With dead ends: 122 [2020-10-14 18:09:07,360 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 18:09:07,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:09:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 18:09:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-10-14 18:09:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:09:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 18:09:07,369 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 54 [2020-10-14 18:09:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:07,369 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 18:09:07,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:09:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 18:09:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:09:07,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:07,370 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:07,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:09:07,371 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:07,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2124235875, now seen corresponding path program 9 times [2020-10-14 18:09:07,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:07,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491978200] [2020-10-14 18:09:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:07,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:12,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:12,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:09:12,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:09:12,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:09:12,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:12,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:12,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:09:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:12,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:14,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:14,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:14,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:14,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:14,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:14,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:14,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:14,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:14,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:14,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:14,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:14,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491978200] [2020-10-14 18:09:14,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:14,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:09:14,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620220461] [2020-10-14 18:09:14,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:09:14,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:14,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:09:14,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:14,325 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 29 states. [2020-10-14 18:09:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:16,480 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-14 18:09:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:09:16,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-14 18:09:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:16,481 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:09:16,482 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:09:16,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:09:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:09:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-14 18:09:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:09:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-14 18:09:16,492 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 57 [2020-10-14 18:09:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:16,492 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-14 18:09:16,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:09:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-14 18:09:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:09:16,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:16,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:16,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:09:16,493 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -195598414, now seen corresponding path program 10 times [2020-10-14 18:09:16,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:16,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298421150] [2020-10-14 18:09:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:16,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:09:21,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-14 18:09:21,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:09:21,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:21,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:21,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:21,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:21,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:21,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:21,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:21,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:21,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 59 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:21,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298421150] [2020-10-14 18:09:21,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:21,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:09:21,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886385710] [2020-10-14 18:09:21,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:09:21,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:21,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:09:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:09:21,678 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 18 states. [2020-10-14 18:09:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:22,061 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-10-14 18:09:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:09:22,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-14 18:09:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:22,067 INFO L225 Difference]: With dead ends: 114 [2020-10-14 18:09:22,068 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:09:22,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:09:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:09:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-14 18:09:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:09:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-14 18:09:22,076 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 60 [2020-10-14 18:09:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:22,077 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-14 18:09:22,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:09:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-14 18:09:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:09:22,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:22,078 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:22,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:09:22,078 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash -592480040, now seen corresponding path program 11 times [2020-10-14 18:09:22,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:22,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000236429] [2020-10-14 18:09:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:22,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:23,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:09:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:28,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:28,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:28,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:28,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:28,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:28,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:28,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000236429] [2020-10-14 18:09:28,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:28,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:09:28,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109883407] [2020-10-14 18:09:28,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:09:28,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:09:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:09:28,727 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 33 states. [2020-10-14 18:09:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:31,681 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2020-10-14 18:09:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:09:31,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-14 18:09:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:31,683 INFO L225 Difference]: With dead ends: 109 [2020-10-14 18:09:31,683 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:09:31,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:09:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:09:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-14 18:09:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:09:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-14 18:09:31,692 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 63 [2020-10-14 18:09:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:31,693 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-14 18:09:31,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:09:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-14 18:09:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:09:31,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:31,694 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:31,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:09:31,694 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:31,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1685037929, now seen corresponding path program 12 times [2020-10-14 18:09:31,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:31,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030413979] [2020-10-14 18:09:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:36,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:36,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:36,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:36,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:36,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:36,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:36,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:36,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:36,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:36,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:36,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:36,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:36,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:36,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:36,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:36,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:36,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:36,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030413979] [2020-10-14 18:09:36,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:36,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:36,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196931146] [2020-10-14 18:09:36,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:36,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:36,988 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 20 states. [2020-10-14 18:09:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:37,461 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2020-10-14 18:09:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:09:37,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-14 18:09:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:37,463 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:09:37,463 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:09:37,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:09:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-14 18:09:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:09:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-14 18:09:37,473 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 66 [2020-10-14 18:09:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:37,473 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-14 18:09:37,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-14 18:09:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:09:37,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:37,475 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:37,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:09:37,475 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:37,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2143026821, now seen corresponding path program 13 times [2020-10-14 18:09:37,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:37,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101553617] [2020-10-14 18:09:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:42,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5210 [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:09:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:09:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:09:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:44,178 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-14 18:09:44,346 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-14 18:09:44,531 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2020-10-14 18:09:45,137 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 76 [2020-10-14 18:09:45,857 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 84 [2020-10-14 18:09:46,882 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 92 [2020-10-14 18:09:47,597 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 83 [2020-10-14 18:09:48,583 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 104 [2020-10-14 18:09:49,117 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2020-10-14 18:09:49,974 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 95 [2020-10-14 18:09:50,483 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-10-14 18:09:51,071 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 84 [2020-10-14 18:09:51,446 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2020-10-14 18:09:51,913 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-14 18:09:52,187 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-14 18:09:52,489 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2020-10-14 18:09:52,769 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-14 18:09:53,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:53,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:53,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:53,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:53,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:53,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:53,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:53,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:53,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:53,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:53,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:53,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:53,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:53,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 39 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:53,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101553617] [2020-10-14 18:09:53,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:53,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:09:53,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664055508] [2020-10-14 18:09:53,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:09:53,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:09:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:09:53,436 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 40 states. [2020-10-14 18:09:55,426 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 207 DAG size of output: 204 [2020-10-14 18:09:58,458 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-14 18:10:00,201 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 347 DAG size of output: 108 [2020-10-14 18:10:01,590 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 213 DAG size of output: 113 [2020-10-14 18:10:08,853 WARN L193 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 319 DAG size of output: 274 [2020-10-14 18:10:10,253 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 240 DAG size of output: 149 [2020-10-14 18:10:16,859 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 315 DAG size of output: 270 [2020-10-14 18:10:27,008 WARN L193 SmtUtils]: Spent 9.95 s on a formula simplification. DAG size of input: 331 DAG size of output: 286 [2020-10-14 18:10:27,951 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-14 18:10:30,846 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 245 DAG size of output: 239 [2020-10-14 18:10:41,356 WARN L193 SmtUtils]: Spent 10.26 s on a formula simplification. DAG size of input: 322 DAG size of output: 277 [2020-10-14 18:10:43,849 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 154 DAG size of output: 129 [2020-10-14 18:10:58,987 WARN L193 SmtUtils]: Spent 14.89 s on a formula simplification. DAG size of input: 339 DAG size of output: 291 [2020-10-14 18:11:00,781 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 143 DAG size of output: 139 [2020-10-14 18:11:02,592 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 174 DAG size of output: 170 [2020-10-14 18:11:19,444 WARN L193 SmtUtils]: Spent 16.59 s on a formula simplification. DAG size of input: 325 DAG size of output: 280 [2020-10-14 18:11:20,824 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2020-10-14 18:11:23,292 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2020-10-14 18:11:25,603 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 159 DAG size of output: 158 [2020-10-14 18:11:47,812 WARN L193 SmtUtils]: Spent 21.91 s on a formula simplification. DAG size of input: 328 DAG size of output: 283 [2020-10-14 18:11:48,744 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-14 18:11:50,187 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 18:11:53,478 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 151 DAG size of output: 151 [2020-10-14 18:11:54,434 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-14 18:11:55,337 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-14 18:11:57,094 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 136 DAG size of output: 136 [2020-10-14 18:11:57,638 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-14 18:11:58,158 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-14 18:11:59,205 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2020-10-14 18:11:59,661 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-14 18:12:00,073 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-14 18:12:00,573 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75