/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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:49:56,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:49:56,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:49:56,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:49:56,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:49:56,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:49:56,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:49:56,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:49:56,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:49:56,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:49:56,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:49:56,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:49:56,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:49:56,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:49:56,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:49:56,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:49:56,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:49:56,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:49:56,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:49:56,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:49:56,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:49:56,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:49:56,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:49:56,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:49:56,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:49:56,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:49:56,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:49:56,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:49:56,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:49:56,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:49:56,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:49:56,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:49:56,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:49:56,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:49:56,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:49:56,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:49:56,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:49:56,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:49:56,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:49:56,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:49:56,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:49:56,488 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 [2020-09-24 21:49:56,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:49:56,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:49:56,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:49:56,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:49:56,535 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:49:56,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:49:56,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:49:56,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:49:56,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:49:56,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:49:56,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:49:56,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:49:56,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:49:56,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:49:56,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:49:56,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:49:56,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:49:56,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:49:56,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:49:56,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:49:56,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:49:56,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:49:56,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:49:56,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:49:56,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:49:56,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:49:56,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:49:56,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:49:56,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:49:56,542 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:49:57,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:49:57,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:49:57,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:49:57,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:49:57,054 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:49:57,055 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-09-24 21:49:57,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39a4e0f1/1baf08d3e9534b13b55c56ff92776631/FLAG141ab6b0a [2020-09-24 21:49:57,699 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:49:57,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/string-1.i [2020-09-24 21:49:57,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39a4e0f1/1baf08d3e9534b13b55c56ff92776631/FLAG141ab6b0a [2020-09-24 21:49:58,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39a4e0f1/1baf08d3e9534b13b55c56ff92776631 [2020-09-24 21:49:58,038 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:49:58,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:49:58,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:58,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:49:58,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:49:58,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3294985c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58, skipping insertion in model container [2020-09-24 21:49:58,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:49:58,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:49:58,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:58,412 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:49:58,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:49:58,488 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:49:58,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58 WrapperNode [2020-09-24 21:49:58,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:49:58,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:49:58,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:49:58,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:49:58,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (1/1) ... [2020-09-24 21:49:58,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:49:58,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:49:58,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:49:58,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:49:58,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (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 [2020-09-24 21:49:58,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:49:58,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:49:58,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:49:58,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:49:58,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:49:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:49:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:49:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:49:58,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:49:58,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:49:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:49:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:49:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:49:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:49:58,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:49:58,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:49:58,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:49:59,267 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:49:59,268 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-24 21:49:59,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:59 BoogieIcfgContainer [2020-09-24 21:49:59,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:49:59,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:49:59,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:49:59,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:49:59,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:49:58" (1/3) ... [2020-09-24 21:49:59,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1986aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:59, skipping insertion in model container [2020-09-24 21:49:59,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:49:58" (2/3) ... [2020-09-24 21:49:59,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b1986aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:49:59, skipping insertion in model container [2020-09-24 21:49:59,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:49:59" (3/3) ... [2020-09-24 21:49:59,289 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-09-24 21:49:59,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:49:59,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:49:59,334 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:49:59,365 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:49:59,366 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:49:59,366 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:49:59,366 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:49:59,366 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:49:59,366 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:49:59,366 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:49:59,366 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:49:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-24 21:49:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 21:49:59,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:49:59,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:49:59,405 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:49:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:49:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -768807104, now seen corresponding path program 1 times [2020-09-24 21:49:59,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:49:59,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184575044] [2020-09-24 21:49:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:49:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:49:59,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:59,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:59,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:49:59,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:00,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 21:50:00,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:50:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-09-24 21:50:00,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:00,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:00,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:50:00,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:00,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:50:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:00,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:00,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:00,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:00,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 21:50:00,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:00,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184575044] [2020-09-24 21:50:00,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:00,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:00,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494799321] [2020-09-24 21:50:00,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:00,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:00,314 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 3 states. [2020-09-24 21:50:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:00,603 INFO L93 Difference]: Finished difference Result 188 states and 215 transitions. [2020-09-24 21:50:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:00,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 21:50:00,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:00,620 INFO L225 Difference]: With dead ends: 188 [2020-09-24 21:50:00,620 INFO L226 Difference]: Without dead ends: 77 [2020-09-24 21:50:00,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-24 21:50:00,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-09-24 21:50:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 21:50:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-09-24 21:50:00,681 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 37 [2020-09-24 21:50:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:00,681 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-09-24 21:50:00,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-09-24 21:50:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:50:00,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:00,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:00,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:00,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1309055982, now seen corresponding path program 1 times [2020-09-24 21:50:00,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:00,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228235373] [2020-09-24 21:50:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:00,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:00,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:01,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 21:50:01,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:01,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-09-24 21:50:01,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:01,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:01,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:01,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:01,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:01,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:01,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:01,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:50:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:01,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228235373] [2020-09-24 21:50:01,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:01,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:50:01,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670080555] [2020-09-24 21:50:01,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:50:01,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:50:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:01,143 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 4 states. [2020-09-24 21:50:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:01,310 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2020-09-24 21:50:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:50:01,311 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-24 21:50:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:01,313 INFO L225 Difference]: With dead ends: 144 [2020-09-24 21:50:01,313 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 21:50:01,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:50:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 21:50:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-24 21:50:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 21:50:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-09-24 21:50:01,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 41 [2020-09-24 21:50:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:01,326 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-09-24 21:50:01,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:50:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-09-24 21:50:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:50:01,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:01,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:01,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:01,329 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash 512896601, now seen corresponding path program 1 times [2020-09-24 21:50:01,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:01,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892802211] [2020-09-24 21:50:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:01,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:50:02,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:02,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-09-24 21:50:02,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:02,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:02,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:02,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:02,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:02,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:02,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:02,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:02,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:50:02,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:02,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:02,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892802211] [2020-09-24 21:50:02,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:02,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:02,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739751371] [2020-09-24 21:50:02,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:02,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:02,963 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 6 states. [2020-09-24 21:50:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:03,230 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2020-09-24 21:50:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:03,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-09-24 21:50:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:03,233 INFO L225 Difference]: With dead ends: 152 [2020-09-24 21:50:03,234 INFO L226 Difference]: Without dead ends: 96 [2020-09-24 21:50:03,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-24 21:50:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2020-09-24 21:50:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-24 21:50:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2020-09-24 21:50:03,248 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 55 [2020-09-24 21:50:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:03,248 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2020-09-24 21:50:03,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2020-09-24 21:50:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 21:50:03,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:03,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:03,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:03,251 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:03,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:03,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1958895614, now seen corresponding path program 2 times [2020-09-24 21:50:03,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:03,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121038571] [2020-09-24 21:50:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:03,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:03,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 21:50:05,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:05,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2276 [2020-09-24 21:50:05,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:05,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:05,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:05,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:05,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:05,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:50:05,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:05,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:05,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121038571] [2020-09-24 21:50:05,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:05,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:05,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581802729] [2020-09-24 21:50:05,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:05,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:05,662 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 8 states. [2020-09-24 21:50:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:05,901 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2020-09-24 21:50:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:05,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-24 21:50:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:05,903 INFO L225 Difference]: With dead ends: 159 [2020-09-24 21:50:05,903 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 21:50:05,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 21:50:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-09-24 21:50:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 21:50:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-24 21:50:05,914 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 62 [2020-09-24 21:50:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:05,915 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-24 21:50:05,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-24 21:50:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 21:50:05,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:05,916 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:05,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:05,917 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -699729223, now seen corresponding path program 3 times [2020-09-24 21:50:05,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:05,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701968776] [2020-09-24 21:50:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:05,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:05,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:06,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:08,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:08,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 21:50:08,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2943 [2020-09-24 21:50:08,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:08,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:08,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:08,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:09,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:09,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:09,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:09,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:09,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:09,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701968776] [2020-09-24 21:50:09,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:09,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:09,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723962650] [2020-09-24 21:50:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:09,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:09,019 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 10 states. [2020-09-24 21:50:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:09,330 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2020-09-24 21:50:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:09,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 21:50:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:09,332 INFO L225 Difference]: With dead ends: 166 [2020-09-24 21:50:09,332 INFO L226 Difference]: Without dead ends: 110 [2020-09-24 21:50:09,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-24 21:50:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2020-09-24 21:50:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 21:50:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-09-24 21:50:09,342 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 69 [2020-09-24 21:50:09,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:09,343 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-09-24 21:50:09,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-09-24 21:50:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 21:50:09,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:09,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:09,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:09,345 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:09,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2109937762, now seen corresponding path program 4 times [2020-09-24 21:50:09,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:09,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507029151] [2020-09-24 21:50:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:09,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:09,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:13,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:13,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:50:13,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:50:13,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3725 [2020-09-24 21:50:13,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:13,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:50:13,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:13,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:13,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:13,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:13,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:13,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:13,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:13,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:13,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:13,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:13,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:13,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:50:13,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507029151] [2020-09-24 21:50:13,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:13,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:13,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452763377] [2020-09-24 21:50:13,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:13,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:13,213 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 12 states. [2020-09-24 21:50:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:13,502 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2020-09-24 21:50:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:13,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-09-24 21:50:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:13,505 INFO L225 Difference]: With dead ends: 168 [2020-09-24 21:50:13,505 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 21:50:13,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 21:50:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2020-09-24 21:50:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-24 21:50:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-09-24 21:50:13,525 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 76 [2020-09-24 21:50:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:13,526 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-09-24 21:50:13,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-09-24 21:50:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 21:50:13,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:13,531 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:13,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:13,532 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 922132249, now seen corresponding path program 5 times [2020-09-24 21:50:13,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:13,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142526667] [2020-09-24 21:50:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:13,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:14,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:14,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 21:50:14,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:14,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-09-24 21:50:14,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:14,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:14,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:14,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:50:14,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:14,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:14,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:14,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:14,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:14,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:50:14,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:14,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:14,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:14,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:14,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142526667] [2020-09-24 21:50:14,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:14,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:50:14,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237534561] [2020-09-24 21:50:14,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:14,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:14,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:14,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:14,113 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 6 states. [2020-09-24 21:50:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:14,287 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-09-24 21:50:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:50:14,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-09-24 21:50:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:14,289 INFO L225 Difference]: With dead ends: 163 [2020-09-24 21:50:14,289 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 21:50:14,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 21:50:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-09-24 21:50:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 21:50:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-24 21:50:14,305 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 83 [2020-09-24 21:50:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:14,305 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-24 21:50:14,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-24 21:50:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 21:50:14,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:14,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:14,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:14,308 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2059478739, now seen corresponding path program 6 times [2020-09-24 21:50:14,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:14,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018424789] [2020-09-24 21:50:14,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:14,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:14,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:15,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:15,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-24 21:50:15,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:15,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-09-24 21:50:15,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:15,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:15,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:50:15,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:15,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:15,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:15,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:15,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:15,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:15,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:15,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018424789] [2020-09-24 21:50:15,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:15,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:50:15,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116070555] [2020-09-24 21:50:15,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:50:15,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:50:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:15,136 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 8 states. [2020-09-24 21:50:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:15,352 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-24 21:50:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:50:15,352 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-09-24 21:50:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:15,355 INFO L225 Difference]: With dead ends: 170 [2020-09-24 21:50:15,355 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 21:50:15,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 21:50:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-09-24 21:50:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 21:50:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2020-09-24 21:50:15,364 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 90 [2020-09-24 21:50:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:15,366 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2020-09-24 21:50:15,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:50:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2020-09-24 21:50:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-24 21:50:15,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:15,368 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:15,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:15,369 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2012961241, now seen corresponding path program 7 times [2020-09-24 21:50:15,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:15,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347684912] [2020-09-24 21:50:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:16,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:16,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 21:50:16,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:16,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-09-24 21:50:16,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:16,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 21:50:16,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:16,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:16,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:16,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:16,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:16,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:16,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:16,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:16,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:16,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347684912] [2020-09-24 21:50:16,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:16,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:50:16,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33335504] [2020-09-24 21:50:16,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:50:16,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:50:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:50:16,520 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand 10 states. [2020-09-24 21:50:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:16,770 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2020-09-24 21:50:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:50:16,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-09-24 21:50:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:16,772 INFO L225 Difference]: With dead ends: 177 [2020-09-24 21:50:16,772 INFO L226 Difference]: Without dead ends: 133 [2020-09-24 21:50:16,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:50:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-24 21:50:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2020-09-24 21:50:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-09-24 21:50:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-09-24 21:50:16,781 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 97 [2020-09-24 21:50:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:16,781 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-09-24 21:50:16,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:50:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-09-24 21:50:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-24 21:50:16,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:16,783 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:16,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:16,783 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:16,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:16,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1354290195, now seen corresponding path program 8 times [2020-09-24 21:50:16,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:16,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796169269] [2020-09-24 21:50:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:16,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:18,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-24 21:50:18,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:18,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-09-24 21:50:18,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-24 21:50:18,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:50:18,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:18,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:18,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:18,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:50:18,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-09-24 21:50:18,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796169269] [2020-09-24 21:50:18,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:18,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:50:18,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625879299] [2020-09-24 21:50:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:50:18,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:18,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:50:18,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:50:18,196 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 12 states. [2020-09-24 21:50:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:18,483 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2020-09-24 21:50:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:50:18,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 104 [2020-09-24 21:50:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:18,485 INFO L225 Difference]: With dead ends: 179 [2020-09-24 21:50:18,485 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 21:50:18,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:50:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 21:50:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-09-24 21:50:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-24 21:50:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2020-09-24 21:50:18,491 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 104 [2020-09-24 21:50:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:18,491 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2020-09-24 21:50:18,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:50:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2020-09-24 21:50:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-24 21:50:18,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:18,493 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:18,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:50:18,493 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:18,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1908556953, now seen corresponding path program 9 times [2020-09-24 21:50:18,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:18,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881951543] [2020-09-24 21:50:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:18,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 21:50:18,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:18,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-09-24 21:50:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-09-24 21:50:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:50:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:18,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:18,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:18,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:18,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:50:18,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:18,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:18,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:18,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:18,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-09-24 21:50:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881951543] [2020-09-24 21:50:18,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:18,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:50:18,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503032535] [2020-09-24 21:50:18,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:50:18,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:50:18,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:50:18,828 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand 6 states. [2020-09-24 21:50:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:18,959 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-09-24 21:50:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:50:18,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2020-09-24 21:50:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:18,960 INFO L225 Difference]: With dead ends: 135 [2020-09-24 21:50:18,961 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 21:50:18,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:50:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 21:50:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 21:50:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 21:50:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 21:50:18,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2020-09-24 21:50:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:18,963 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 21:50:18,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:50:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 21:50:18,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 21:50:18,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:50:18,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 21:50:19,056 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,056 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,056 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,056 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-24 21:50:19,056 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,057 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 21:50:19,057 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 21:50:19,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:50:19,057 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:50:19,057 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L268 CegarLoopResult]: For program point L5-3(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L268 CegarLoopResult]: For program point L35-2(line 35) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L268 CegarLoopResult]: For program point L35-4(line 35) no Hoare annotation was computed. [2020-09-24 21:50:19,058 INFO L264 CegarLoopResult]: At program point L35-5(lines 35 36) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,059 INFO L268 CegarLoopResult]: For program point L35-6(lines 18 61) no Hoare annotation was computed. [2020-09-24 21:50:19,059 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-24 21:50:19,059 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-09-24 21:50:19,059 INFO L268 CegarLoopResult]: For program point L27-2(line 27) no Hoare annotation was computed. [2020-09-24 21:50:19,059 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,060 INFO L268 CegarLoopResult]: For program point L19-4(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L19-5(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L19-6(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L19-7(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L19-8(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,061 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,062 INFO L268 CegarLoopResult]: For program point L19-9(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,062 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 53) no Hoare annotation was computed. [2020-09-24 21:50:19,062 INFO L268 CegarLoopResult]: For program point L19-10(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,062 INFO L268 CegarLoopResult]: For program point L44-3(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,062 INFO L268 CegarLoopResult]: For program point L19-11(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L44-4(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L19-12(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L19-13(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L44-6(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L44-7(line 44) no Hoare annotation was computed. [2020-09-24 21:50:19,063 INFO L268 CegarLoopResult]: For program point L19-14(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,064 INFO L268 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-09-24 21:50:19,064 INFO L264 CegarLoopResult]: At program point L44-8(lines 42 54) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,064 INFO L268 CegarLoopResult]: For program point L19-15(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,064 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-09-24 21:50:19,064 INFO L268 CegarLoopResult]: For program point L19-16(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,064 INFO L268 CegarLoopResult]: For program point L36-2(line 36) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L19-17(line 19) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L28-2(line 28) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L28-3(line 28) no Hoare annotation was computed. [2020-09-24 21:50:19,065 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-09-24 21:50:19,066 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-09-24 21:50:19,067 INFO L268 CegarLoopResult]: For program point L46-2(line 46) no Hoare annotation was computed. [2020-09-24 21:50:19,067 INFO L268 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-09-24 21:50:19,067 INFO L268 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-09-24 21:50:19,067 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-24 21:50:19,067 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 21:50:19,067 INFO L268 CegarLoopResult]: For program point L22-3(lines 22 23) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L22-4(line 22) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L22-5(line 22) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L264 CegarLoopResult]: At program point L22-6(lines 22 23) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L22-7(lines 22 23) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-09-24 21:50:19,068 INFO L268 CegarLoopResult]: For program point L47-2(line 47) no Hoare annotation was computed. [2020-09-24 21:50:19,069 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-09-24 21:50:19,069 INFO L268 CegarLoopResult]: For program point L31-2(line 31) no Hoare annotation was computed. [2020-09-24 21:50:19,069 INFO L268 CegarLoopResult]: For program point L31-4(line 31) no Hoare annotation was computed. [2020-09-24 21:50:19,069 INFO L264 CegarLoopResult]: At program point L31-5(lines 31 32) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,069 INFO L268 CegarLoopResult]: For program point L31-6(lines 31 32) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L32-2(line 32) no Hoare annotation was computed. [2020-09-24 21:50:19,070 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L268 CegarLoopResult]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L268 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-09-24 21:50:19,071 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L26-3(lines 26 27) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L26-4(line 26) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L26-5(line 26) no Hoare annotation was computed. [2020-09-24 21:50:19,072 INFO L264 CegarLoopResult]: At program point L26-6(lines 26 27) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2020-09-24 21:50:19,072 INFO L268 CegarLoopResult]: For program point L26-7(lines 26 27) no Hoare annotation was computed. [2020-09-24 21:50:19,073 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-24 21:50:19,073 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-09-24 21:50:19,073 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-09-24 21:50:19,073 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-09-24 21:50:19,073 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-24 21:50:19,073 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-09-24 21:50:19,074 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-09-24 21:50:19,074 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-09-24 21:50:19,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:50:19 BoogieIcfgContainer [2020-09-24 21:50:19,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:50:19,099 INFO L168 Benchmark]: Toolchain (without parser) took 21057.53 ms. Allocated memory was 116.4 MB in the beginning and 323.5 MB in the end (delta: 207.1 MB). Free memory was 74.8 MB in the beginning and 91.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 190.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,100 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 116.4 MB. Free memory was 91.9 MB in the beginning and 91.8 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.76 ms. Allocated memory was 116.4 MB in the beginning and 130.0 MB in the end (delta: 13.6 MB). Free memory was 74.1 MB in the beginning and 99.0 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,102 INFO L168 Benchmark]: Boogie Preprocessor took 194.63 ms. Allocated memory was 130.0 MB in the beginning and 166.7 MB in the end (delta: 36.7 MB). Free memory was 98.7 MB in the beginning and 151.2 MB in the end (delta: -52.5 MB). Peak memory consumption was 341.8 kB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,103 INFO L168 Benchmark]: RCFGBuilder took 593.88 ms. Allocated memory is still 166.7 MB. Free memory was 151.2 MB in the beginning and 127.0 MB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,104 INFO L168 Benchmark]: TraceAbstraction took 19815.68 ms. Allocated memory was 166.7 MB in the beginning and 323.5 MB in the end (delta: 156.8 MB). Free memory was 126.5 MB in the beginning and 91.9 MB in the end (delta: 34.6 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:50:19,107 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 116.4 MB. Free memory was 91.9 MB in the beginning and 91.8 MB in the end (delta: 104.9 kB). Peak memory consumption was 104.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 441.76 ms. Allocated memory was 116.4 MB in the beginning and 130.0 MB in the end (delta: 13.6 MB). Free memory was 74.1 MB in the beginning and 99.0 MB in the end (delta: -24.9 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 194.63 ms. Allocated memory was 130.0 MB in the beginning and 166.7 MB in the end (delta: 36.7 MB). Free memory was 98.7 MB in the beginning and 151.2 MB in the end (delta: -52.5 MB). Peak memory consumption was 341.8 kB. Max. memory is 7.1 GB. * RCFGBuilder took 593.88 ms. Allocated memory is still 166.7 MB. Free memory was 151.2 MB in the beginning and 127.0 MB in the end (delta: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19815.68 ms. Allocated memory was 166.7 MB in the beginning and 323.5 MB in the end (delta: 156.8 MB). Free memory was 126.5 MB in the beginning and 91.9 MB in the end (delta: 34.6 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 110 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.6s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 857 SDtfs, 309 SDslu, 2777 SDs, 0 SdLazy, 1662 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 60 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 21 PreInvPairs, 36 NumberOfFragments, 58 HoareAnnotationTreeSize, 21 FomulaSimplifications, 116 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.1s InterpolantComputationTime, 825 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 814 ConstructedInterpolants, 0 QuantifiedInterpolants, 99074 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 454/614 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...