/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=SMALLEST --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/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:29:13,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:29:13,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:29:13,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:29:13,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:29:13,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:29:13,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:29:13,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:29:13,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:29:13,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:29:13,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:29:13,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:29:13,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:29:13,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:29:13,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:29:13,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:29:13,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:29:13,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:29:13,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:29:13,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:29:13,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:29:13,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:29:13,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:29:13,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:29:13,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:29:13,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:29:13,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:29:13,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:29:13,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:29:13,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:29:13,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:29:13,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:29:13,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:29:13,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:29:13,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:29:13,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:29:13,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:29:13,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:29:13,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:29:13,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:29:13,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:29:13,387 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 18:29:13,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:29:13,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:29:13,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:29:13,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:29:13,454 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:29:13,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:29:13,454 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:29:13,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:29:13,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:29:13,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:29:13,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:29:13,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:29:13,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:29:13,456 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:29:13,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:29:13,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:29:13,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:29:13,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:29:13,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:29:13,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:29:13,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:29:13,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:29:13,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:29:13,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:29:13,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:29:13,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:29:13,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:29:13,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:29:13,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:29:13,460 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:29:13,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:29:13,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:29:14,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:29:14,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:29:14,006 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:29:14,007 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 18:29:14,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad2f3a8/0a1d72e6180e4ea9976720ec6f8e7465/FLAGd52ed9e07 [2020-09-24 18:29:14,636 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:29:14,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-24 18:29:14,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad2f3a8/0a1d72e6180e4ea9976720ec6f8e7465/FLAGd52ed9e07 [2020-09-24 18:29:14,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad2f3a8/0a1d72e6180e4ea9976720ec6f8e7465 [2020-09-24 18:29:14,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:29:15,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:29:15,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:15,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:29:15,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:29:15,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:14" (1/1) ... [2020-09-24 18:29:15,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a33c50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15, skipping insertion in model container [2020-09-24 18:29:15,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:29:14" (1/1) ... [2020-09-24 18:29:15,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:29:15,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:29:15,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:15,325 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:29:15,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:29:15,371 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:29:15,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15 WrapperNode [2020-09-24 18:29:15,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:29:15,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:29:15,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:29:15,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:29:15,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (1/1) ... [2020-09-24 18:29:15,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:29:15,490 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:29:15,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:29:15,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:29:15,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (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 18:29:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:29:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:29:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 18:29:15,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:29:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:29:15,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 18:29:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 18:29:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 18:29:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 18:29:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:29:15,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:29:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:29:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:29:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:29:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:29:15,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:29:15,929 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:29:15,929 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 18:29:15,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:15 BoogieIcfgContainer [2020-09-24 18:29:15,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:29:15,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:29:15,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:29:15,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:29:15,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:29:14" (1/3) ... [2020-09-24 18:29:15,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d46ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:15, skipping insertion in model container [2020-09-24 18:29:15,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:29:15" (2/3) ... [2020-09-24 18:29:15,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d46ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:29:15, skipping insertion in model container [2020-09-24 18:29:15,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:29:15" (3/3) ... [2020-09-24 18:29:15,945 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-24 18:29:15,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:29:15,968 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:29:15,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:29:16,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:29:16,020 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:29:16,020 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:29:16,020 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:29:16,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:29:16,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:29:16,020 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:29:16,020 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:29:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-24 18:29:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:16,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:16,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:16,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-24 18:29:16,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:16,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078224842] [2020-09-24 18:29:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:16,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:16,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:16,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:17,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:17,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:17,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:29:17,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-09-24 18:29:17,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:17,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:17,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 18:29:17,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:17,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 18:29:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:17,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:17,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:17,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:17,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:17,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:29:17,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:17,149 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 18:29:17,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078224842] [2020-09-24 18:29:17,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:17,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 18:29:17,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520158059] [2020-09-24 18:29:17,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 18:29:17,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 18:29:17,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 18:29:17,184 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-24 18:29:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:17,356 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-24 18:29:17,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 18:29:17,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 18:29:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:17,370 INFO L225 Difference]: With dead ends: 121 [2020-09-24 18:29:17,370 INFO L226 Difference]: Without dead ends: 57 [2020-09-24 18:29:17,375 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 18:29:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-24 18:29:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-24 18:29:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 18:29:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-24 18:29:17,422 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-24 18:29:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:17,423 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-24 18:29:17,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 18:29:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-24 18:29:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 18:29:17,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:17,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:17,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:29:17,426 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-24 18:29:17,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:17,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230925849] [2020-09-24 18:29:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:17,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:17,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:17,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:18,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:18,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 18:29:18,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:29:18,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-09-24 18:29:18,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:29:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 18:29:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:29:18,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:18,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:18,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:18,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:18,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:18,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:18,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:29:18,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:18,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:18,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:18,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:18,132 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 18:29:18,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230925849] [2020-09-24 18:29:18,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:18,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:29:18,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359827476] [2020-09-24 18:29:18,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:18,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:18,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:18,145 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-24 18:29:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:18,361 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-24 18:29:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:18,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 18:29:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:18,365 INFO L225 Difference]: With dead ends: 95 [2020-09-24 18:29:18,365 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 18:29:18,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 18:29:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-24 18:29:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-24 18:29:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-24 18:29:18,382 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-24 18:29:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:18,382 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-24 18:29:18,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-24 18:29:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 18:29:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:18,384 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 18:29:18,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:29:18,385 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-24 18:29:18,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:18,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695349219] [2020-09-24 18:29:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:18,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:20,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:20,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 18:29:20,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:29:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1691 [2020-09-24 18:29:20,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:29:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 18:29:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:29:20,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:20,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:20,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:20,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:20,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:29:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:20,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:20,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:29:20,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695349219] [2020-09-24 18:29:20,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:29:20,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:29:20,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788042513] [2020-09-24 18:29:20,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:29:20,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:20,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:29:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:29:20,161 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2020-09-24 18:29:20,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:20,357 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-09-24 18:29:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:29:20,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-24 18:29:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:20,360 INFO L225 Difference]: With dead ends: 102 [2020-09-24 18:29:20,360 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 18:29:20,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:29:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 18:29:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-09-24 18:29:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 18:29:20,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-24 18:29:20,378 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-24 18:29:20,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:20,378 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-24 18:29:20,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:29:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-24 18:29:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 18:29:20,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:20,380 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] [2020-09-24 18:29:20,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:29:20,381 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-24 18:29:20,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:20,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018000262] [2020-09-24 18:29:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:20,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:20,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:20,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:21,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:24,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 18:29:25,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:29:25,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 18:29:25,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 18:29:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:29:25,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 18:29:25,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:25,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:25,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:25,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:25,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:25,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:29:25,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:25,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:29:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:25,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018000262] [2020-09-24 18:29:25,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:25,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 18:29:25,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685285788] [2020-09-24 18:29:25,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 18:29:25,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 18:29:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-09-24 18:29:25,916 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-24 18:29:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:27,407 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-24 18:29:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 18:29:27,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-24 18:29:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:27,410 INFO L225 Difference]: With dead ends: 164 [2020-09-24 18:29:27,412 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 18:29:27,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 18:29:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 18:29:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-24 18:29:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-24 18:29:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-24 18:29:27,445 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-24 18:29:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:27,446 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-24 18:29:27,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 18:29:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-24 18:29:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 18:29:27,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:27,449 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] [2020-09-24 18:29:27,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:29:27,450 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-24 18:29:27,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:27,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475505313] [2020-09-24 18:29:27,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:27,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:27,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:29,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:32,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:32,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 18:29:32,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 18:29:32,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 18:29:32,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:32,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:32,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:29:32,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:29:32,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:32,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:32,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:32,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:32,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:32,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:29:32,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:32,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:32,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:32,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:32,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475505313] [2020-09-24 18:29:32,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:32,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 18:29:32,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215909796] [2020-09-24 18:29:32,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 18:29:32,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 18:29:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 18:29:32,591 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-24 18:29:33,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:33,016 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-24 18:29:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 18:29:33,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-24 18:29:33,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:33,021 INFO L225 Difference]: With dead ends: 166 [2020-09-24 18:29:33,022 INFO L226 Difference]: Without dead ends: 146 [2020-09-24 18:29:33,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-24 18:29:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-24 18:29:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-24 18:29:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 18:29:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-24 18:29:33,049 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-24 18:29:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:33,050 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-24 18:29:33,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 18:29:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-24 18:29:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 18:29:33,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:33,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:33,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:29:33,055 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-24 18:29:33,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:33,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830983948] [2020-09-24 18:29:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:33,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:33,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:33,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:34,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:35,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:38,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:38,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 18:29:38,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 18:29:38,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 18:29:38,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:38,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:38,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:29:38,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 18:29:38,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:29:38,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:38,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:38,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:38,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:38,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:38,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:29:38,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:38,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:29:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:38,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830983948] [2020-09-24 18:29:38,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:38,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 18:29:38,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881333324] [2020-09-24 18:29:38,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 18:29:38,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 18:29:38,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 18:29:38,221 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-24 18:29:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:38,569 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-09-24 18:29:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 18:29:38,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-24 18:29:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:38,571 INFO L225 Difference]: With dead ends: 165 [2020-09-24 18:29:38,571 INFO L226 Difference]: Without dead ends: 135 [2020-09-24 18:29:38,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-24 18:29:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-24 18:29:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2020-09-24 18:29:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 18:29:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-24 18:29:38,588 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-24 18:29:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:38,589 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-24 18:29:38,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 18:29:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-24 18:29:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 18:29:38,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:38,593 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:29:38,594 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-24 18:29:38,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:38,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831869375] [2020-09-24 18:29:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:38,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:38,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:40,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:40,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 18:29:40,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:29:40,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1572 [2020-09-24 18:29:40,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:40,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:29:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-24 18:29:40,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 18:29:40,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:40,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:40,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:40,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:40,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:40,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:29:40,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:40,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:40,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:40,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-24 18:29:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:40,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:40,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:40,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 18:29:40,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:40,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:29:40,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:40,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:29:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:40,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:29:40,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:29:40,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831869375] [2020-09-24 18:29:40,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:40,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:29:40,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720500600] [2020-09-24 18:29:40,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:29:40,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:29:40,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:29:40,303 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 9 states. [2020-09-24 18:29:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:40,609 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-09-24 18:29:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 18:29:40,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-09-24 18:29:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:40,611 INFO L225 Difference]: With dead ends: 135 [2020-09-24 18:29:40,611 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 18:29:40,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 18:29:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 18:29:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-09-24 18:29:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 18:29:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-24 18:29:40,617 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-24 18:29:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:40,617 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-24 18:29:40,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:29:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-24 18:29:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 18:29:40,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:40,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:40,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:29:40,619 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-24 18:29:40,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:40,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078038466] [2020-09-24 18:29:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:40,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:41,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:41,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:41,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:42,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:42,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:45,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:45,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-24 18:29:45,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 18:29:45,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 18:29:45,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 18:29:45,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 18:29:45,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 18:29:45,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:46,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:46,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:46,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:46,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:46,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:46,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:46,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:46,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:46,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 18:29:46,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078038466] [2020-09-24 18:29:46,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:46,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 18:29:46,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485735326] [2020-09-24 18:29:46,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 18:29:46,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:46,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 18:29:46,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-24 18:29:46,212 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-09-24 18:29:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:47,838 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2020-09-24 18:29:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 18:29:47,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-09-24 18:29:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:47,843 INFO L225 Difference]: With dead ends: 128 [2020-09-24 18:29:47,844 INFO L226 Difference]: Without dead ends: 126 [2020-09-24 18:29:47,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 18:29:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-24 18:29:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 96. [2020-09-24 18:29:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 18:29:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-09-24 18:29:47,861 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 65 [2020-09-24 18:29:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:47,862 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-09-24 18:29:47,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 18:29:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-09-24 18:29:47,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 18:29:47,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:47,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 18:29:47,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:29:47,864 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 5 times [2020-09-24 18:29:47,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:47,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592424565] [2020-09-24 18:29:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:48,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:48,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:48,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:49,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:50,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:52,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:52,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 18:29:52,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:52,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:29:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:29:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:29:53,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:29:53,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:29:53,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:29:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:29:53,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592424565] [2020-09-24 18:29:53,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:29:53,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 18:29:53,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605761541] [2020-09-24 18:29:53,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 18:29:53,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:29:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 18:29:53,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:29:53,010 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 12 states. [2020-09-24 18:29:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:29:53,501 INFO L93 Difference]: Finished difference Result 198 states and 207 transitions. [2020-09-24 18:29:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 18:29:53,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-24 18:29:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:29:53,503 INFO L225 Difference]: With dead ends: 198 [2020-09-24 18:29:53,504 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 18:29:53,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-09-24 18:29:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 18:29:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2020-09-24 18:29:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 18:29:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-24 18:29:53,519 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 75 [2020-09-24 18:29:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:29:53,519 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-24 18:29:53,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 18:29:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-24 18:29:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 18:29:53,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:29:53,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:29:53,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 18:29:53,521 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:29:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:29:53,522 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 2 times [2020-09-24 18:29:53,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:29:53,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733456017] [2020-09-24 18:29:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:29:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:29:53,539 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:29:53,540 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:29:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 18:29:53,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:29:53 BoogieIcfgContainer [2020-09-24 18:29:53,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:29:53,567 INFO L168 Benchmark]: Toolchain (without parser) took 38569.81 ms. Allocated memory was 138.9 MB in the beginning and 411.6 MB in the end (delta: 272.6 MB). Free memory was 102.1 MB in the beginning and 262.8 MB in the end (delta: -160.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,568 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.41 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,570 INFO L168 Benchmark]: Boogie Preprocessor took 116.80 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 177.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,570 INFO L168 Benchmark]: RCFGBuilder took 445.92 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 158.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,571 INFO L168 Benchmark]: TraceAbstraction took 37626.77 ms. Allocated memory was 200.3 MB in the beginning and 411.6 MB in the end (delta: 211.3 MB). Free memory was 157.9 MB in the beginning and 262.8 MB in the end (delta: -104.9 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:29:53,575 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.41 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.80 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 91.3 MB in the beginning and 177.5 MB in the end (delta: -86.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 445.92 ms. Allocated memory is still 200.3 MB. Free memory was 177.5 MB in the beginning and 158.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 37626.77 ms. Allocated memory was 200.3 MB in the beginning and 411.6 MB in the end (delta: 211.3 MB). Free memory was 157.9 MB in the beginning and 262.8 MB in the end (delta: -104.9 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i