/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/bitvector/interleave_bits.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:59:51,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:59:51,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:59:51,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:59:51,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:59:51,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:59:51,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:59:51,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:59:51,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:59:51,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:59:51,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:59:51,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:59:51,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:59:51,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:59:51,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:59:51,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:59:51,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:59:51,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:59:51,414 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:59:51,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:59:51,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:59:51,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:59:51,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:59:51,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:59:51,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:59:51,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:59:51,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:59:51,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:59:51,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:59:51,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:59:51,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:59:51,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:59:51,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:59:51,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:59:51,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:59:51,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:59:51,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:59:51,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:59:51,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:59:51,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:59:51,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:59:51,440 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:59:51,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:59:51,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:59:51,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:59:51,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:59:51,471 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:59:51,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:59:51,471 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:59:51,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:59:51,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:59:51,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:59:51,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:59:51,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:59:51,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:59:51,473 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:59:51,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:59:51,474 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:59:51,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:59:51,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:59:51,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:59:51,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:59:51,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:59:51,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:59:51,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:59:51,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:59:51,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:59:51,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:59:51,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:59:51,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:59:51,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:59:51,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:59:51,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:59:51,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:59:51,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:59:51,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:59:51,883 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:59:51,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-26 19:59:51,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7940ec228/0b41e77529fe4ac88abf3993150cde0b/FLAG53af2f031 [2020-10-26 19:59:52,722 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:59:52,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/interleave_bits.i [2020-10-26 19:59:52,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7940ec228/0b41e77529fe4ac88abf3993150cde0b/FLAG53af2f031 [2020-10-26 19:59:53,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7940ec228/0b41e77529fe4ac88abf3993150cde0b [2020-10-26 19:59:53,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:59:53,026 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:59:53,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:59:53,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:59:53,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:59:53,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9d2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53, skipping insertion in model container [2020-10-26 19:59:53,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:59:53,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:59:53,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:59:53,294 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:59:53,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:59:53,344 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:59:53,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53 WrapperNode [2020-10-26 19:59:53,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:59:53,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:59:53,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:59:53,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:59:53,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... [2020-10-26 19:59:53,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:59:53,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:59:53,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:59:53,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:59:53,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:59:53,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:59:53,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:59:53,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:59:53,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:59:53,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:59:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:59:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-26 19:59:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:59:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:59:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:59:53,767 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:59:53,768 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 19:59:53,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:59:53 BoogieIcfgContainer [2020-10-26 19:59:53,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:59:53,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:59:53,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:59:53,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:59:53,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:59:53" (1/3) ... [2020-10-26 19:59:53,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1610e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:59:53, skipping insertion in model container [2020-10-26 19:59:53,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:59:53" (2/3) ... [2020-10-26 19:59:53,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1610e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:59:53, skipping insertion in model container [2020-10-26 19:59:53,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:59:53" (3/3) ... [2020-10-26 19:59:53,783 INFO L111 eAbstractionObserver]: Analyzing ICFG interleave_bits.i [2020-10-26 19:59:53,801 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:59:53,844 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:59:53,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:59:53,904 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:59:53,904 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:59:53,905 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:59:53,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:59:53,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:59:53,905 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:59:53,905 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:59:53,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:59:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-26 19:59:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 19:59:53,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:53,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:53,943 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1830502951, now seen corresponding path program 1 times [2020-10-26 19:59:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:53,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16262346] [2020-10-26 19:59:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:54,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:54,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:54,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 19:59:54,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:54,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-26 19:59:54,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:54,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:59:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:59:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:59:54,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:54,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:54,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:59:54,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:54,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:59:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:54,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16262346] [2020-10-26 19:59:54,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:59:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:59:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27198963] [2020-10-26 19:59:54,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:59:54,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:54,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:59:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:59:54,637 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2020-10-26 19:59:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:54,853 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-26 19:59:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:59:54,857 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-26 19:59:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:54,873 INFO L225 Difference]: With dead ends: 39 [2020-10-26 19:59:54,874 INFO L226 Difference]: Without dead ends: 16 [2020-10-26 19:59:54,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:59:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-26 19:59:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-26 19:59:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-26 19:59:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-26 19:59:54,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-26 19:59:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:54,967 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-26 19:59:54,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:59:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-26 19:59:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 19:59:54,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:54,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:54,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:59:54,972 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash 353221151, now seen corresponding path program 1 times [2020-10-26 19:59:54,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:54,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921190464] [2020-10-26 19:59:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:55,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:55,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:55,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:59:55,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:55,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-26 19:59:55,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:59:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:59:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:59:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:55,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:55,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:55,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:55,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:59:55,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:55,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:55,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:59:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:55,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921190464] [2020-10-26 19:59:55,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:55,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:59:55,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577160285] [2020-10-26 19:59:55,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:59:55,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:59:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:59:55,424 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-26 19:59:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:55,591 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-26 19:59:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:59:55,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-26 19:59:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:55,593 INFO L225 Difference]: With dead ends: 25 [2020-10-26 19:59:55,593 INFO L226 Difference]: Without dead ends: 17 [2020-10-26 19:59:55,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:59:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-26 19:59:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-26 19:59:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-26 19:59:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-26 19:59:55,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-26 19:59:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:55,606 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-26 19:59:55,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:59:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-26 19:59:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:59:55,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:55,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:55,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:59:55,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1802125607, now seen corresponding path program 2 times [2020-10-26 19:59:55,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:55,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238996040] [2020-10-26 19:59:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:55,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:55,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:55,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:59:55,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:55,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-26 19:59:55,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:59:55,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:55,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:59:55,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:55,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:55,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:55,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:55,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:55,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:55,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:59:55,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:55,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:55,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:55,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238996040] [2020-10-26 19:59:55,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:55,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:59:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272146554] [2020-10-26 19:59:55,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:59:55,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:55,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:59:55,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:59:55,994 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-26 19:59:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:56,138 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-26 19:59:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:59:56,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-26 19:59:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:56,139 INFO L225 Difference]: With dead ends: 26 [2020-10-26 19:59:56,139 INFO L226 Difference]: Without dead ends: 18 [2020-10-26 19:59:56,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:59:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-26 19:59:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-26 19:59:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-26 19:59:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-26 19:59:56,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-26 19:59:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:56,148 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-26 19:59:56,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:59:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-26 19:59:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:59:56,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:56,149 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:56,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:59:56,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -526476513, now seen corresponding path program 3 times [2020-10-26 19:59:56,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:56,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639784158] [2020-10-26 19:59:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:56,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:56,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:56,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:59:56,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:56,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-26 19:59:56,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:59:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:59:56,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:56,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:56,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:56,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:56,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:56,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:59:56,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:56,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:56,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639784158] [2020-10-26 19:59:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:56,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:59:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988026576] [2020-10-26 19:59:56,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:59:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:59:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:59:56,412 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-10-26 19:59:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:56,673 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-26 19:59:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:59:56,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-26 19:59:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:56,675 INFO L225 Difference]: With dead ends: 27 [2020-10-26 19:59:56,675 INFO L226 Difference]: Without dead ends: 19 [2020-10-26 19:59:56,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:59:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-26 19:59:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-26 19:59:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-26 19:59:56,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-26 19:59:56,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-26 19:59:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:56,685 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-26 19:59:56,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:59:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-26 19:59:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:59:56,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:56,686 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:56,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:59:56,687 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash 301301799, now seen corresponding path program 4 times [2020-10-26 19:59:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:56,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66823327] [2020-10-26 19:59:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:56,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:56,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:59:56,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:56,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-26 19:59:56,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:59:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:56,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:59:56,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:57,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:57,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:57,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:57,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:57,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:59:57,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:57,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:57,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66823327] [2020-10-26 19:59:57,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:57,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:59:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282772840] [2020-10-26 19:59:57,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:59:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:59:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:59:57,089 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-10-26 19:59:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:57,343 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-26 19:59:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:59:57,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-26 19:59:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:57,345 INFO L225 Difference]: With dead ends: 28 [2020-10-26 19:59:57,345 INFO L226 Difference]: Without dead ends: 20 [2020-10-26 19:59:57,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:59:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-26 19:59:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-26 19:59:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-26 19:59:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-26 19:59:57,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-10-26 19:59:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:57,354 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-26 19:59:57,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:59:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-26 19:59:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:59:57,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:57,355 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:57,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:59:57,356 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 192625695, now seen corresponding path program 5 times [2020-10-26 19:59:57,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:57,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109284331] [2020-10-26 19:59:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:57,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:57,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:57,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:59:57,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:57,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-26 19:59:57,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:59:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:57,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:59:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:57,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:57,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:57,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:57,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:57,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:59:57,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:57,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:57,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:57,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109284331] [2020-10-26 19:59:57,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:57,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:59:57,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987728959] [2020-10-26 19:59:57,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:59:57,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:59:57,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:59:57,695 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-26 19:59:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:58,026 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-26 19:59:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:59:58,026 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-26 19:59:58,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:58,028 INFO L225 Difference]: With dead ends: 29 [2020-10-26 19:59:58,028 INFO L226 Difference]: Without dead ends: 21 [2020-10-26 19:59:58,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:59:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-26 19:59:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-26 19:59:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-26 19:59:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-26 19:59:58,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-10-26 19:59:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:58,036 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-26 19:59:58,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:59:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-26 19:59:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 19:59:58,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:58,037 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:58,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:59:58,038 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1118633767, now seen corresponding path program 6 times [2020-10-26 19:59:58,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:58,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731211910] [2020-10-26 19:59:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:58,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:59:58,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:58,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:59:58,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:58,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:58,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:58,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:58,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:58,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:59:58,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:58,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:58,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:58,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731211910] [2020-10-26 19:59:58,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:58,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:59:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31241194] [2020-10-26 19:59:58,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:59:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:59:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:59:58,408 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-10-26 19:59:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:58,816 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-26 19:59:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:59:58,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-26 19:59:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:58,818 INFO L225 Difference]: With dead ends: 30 [2020-10-26 19:59:58,818 INFO L226 Difference]: Without dead ends: 22 [2020-10-26 19:59:58,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:59:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-26 19:59:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-26 19:59:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-26 19:59:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-26 19:59:58,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-10-26 19:59:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:58,827 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-26 19:59:58,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:59:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-26 19:59:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 19:59:58,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:58,828 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:58,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:59:58,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:58,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:58,829 INFO L82 PathProgramCache]: Analyzing trace with hash -239887073, now seen corresponding path program 7 times [2020-10-26 19:59:58,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:58,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810538216] [2020-10-26 19:59:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:58,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:59,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:59,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:59:59,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:59:59,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:59,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:59:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:59:59,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:59:59,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:59:59,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:59:59,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:59:59,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:59:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:59:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:59:59,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:59:59,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:59:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:59:59,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810538216] [2020-10-26 19:59:59,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:59:59,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:59:59,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119948508] [2020-10-26 19:59:59,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:59:59,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:59:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:59:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:59:59,335 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 11 states. [2020-10-26 19:59:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:59:59,812 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-26 19:59:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:59:59,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-26 19:59:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:59:59,813 INFO L225 Difference]: With dead ends: 31 [2020-10-26 19:59:59,813 INFO L226 Difference]: Without dead ends: 23 [2020-10-26 19:59:59,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:59:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-26 19:59:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-26 19:59:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 19:59:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-26 19:59:59,821 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-26 19:59:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:59:59,822 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-26 19:59:59,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:59:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-26 19:59:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:59:59,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:59:59,823 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:59:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:59:59,823 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:59:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:59:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 595639847, now seen corresponding path program 8 times [2020-10-26 19:59:59,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:59:59,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542516883] [2020-10-26 19:59:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:59:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:59:59,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:00,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 20:00:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:00,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-26 20:00:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:00:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:00:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:00,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:00,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:00,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:00,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:00,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 20:00:00,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:00,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:00,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:00,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:00,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:00,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542516883] [2020-10-26 20:00:00,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:00,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 20:00:00,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975184240] [2020-10-26 20:00:00,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:00:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:00:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:00:00,318 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-10-26 20:00:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:00,823 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-26 20:00:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:00:00,824 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-26 20:00:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:00,825 INFO L225 Difference]: With dead ends: 32 [2020-10-26 20:00:00,825 INFO L226 Difference]: Without dead ends: 24 [2020-10-26 20:00:00,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:00:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-26 20:00:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-26 20:00:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 20:00:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-26 20:00:00,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-10-26 20:00:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:00,840 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-26 20:00:00,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:00:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-26 20:00:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 20:00:00,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:00,841 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:00,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:00:00,842 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash 727170591, now seen corresponding path program 9 times [2020-10-26 20:00:00,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:00,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008542181] [2020-10-26 20:00:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:01,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:01,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:00:01,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:01,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-26 20:00:01,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:00:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:01,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:00:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:01,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:01,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:01,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:01,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:01,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:01,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:01,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:01,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008542181] [2020-10-26 20:00:01,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:01,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 20:00:01,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942114308] [2020-10-26 20:00:01,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 20:00:01,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 20:00:01,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:00:01,477 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 13 states. [2020-10-26 20:00:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:02,085 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-26 20:00:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:00:02,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-26 20:00:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:02,087 INFO L225 Difference]: With dead ends: 33 [2020-10-26 20:00:02,087 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 20:00:02,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-26 20:00:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 20:00:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 20:00:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 20:00:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-26 20:00:02,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-10-26 20:00:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:02,096 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-26 20:00:02,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 20:00:02,096 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-26 20:00:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 20:00:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:02,097 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:02,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:00:02,098 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:02,098 INFO L82 PathProgramCache]: Analyzing trace with hash 509656359, now seen corresponding path program 10 times [2020-10-26 20:00:02,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:02,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700435807] [2020-10-26 20:00:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:02,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:02,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:02,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 20:00:02,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:02,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-26 20:00:02,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:02,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 20:00:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:02,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:00:02,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:02,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:02,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:02,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:02,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:02,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700435807] [2020-10-26 20:00:02,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:02,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 20:00:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456712509] [2020-10-26 20:00:02,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 20:00:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:02,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 20:00:02,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:00:02,647 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 14 states. [2020-10-26 20:00:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:03,260 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-26 20:00:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:00:03,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-26 20:00:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:03,262 INFO L225 Difference]: With dead ends: 34 [2020-10-26 20:00:03,262 INFO L226 Difference]: Without dead ends: 26 [2020-10-26 20:00:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-26 20:00:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-26 20:00:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-26 20:00:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 20:00:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-26 20:00:03,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-10-26 20:00:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:03,277 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-26 20:00:03,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 20:00:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-26 20:00:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 20:00:03,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:03,280 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:03,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:00:03,280 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1938317537, now seen corresponding path program 11 times [2020-10-26 20:00:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:03,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907446823] [2020-10-26 20:00:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:03,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:03,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:03,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:00:03,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:03,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:03,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:03,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:03,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:03,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:03,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:03,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:03,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907446823] [2020-10-26 20:00:03,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:03,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:00:03,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837816482] [2020-10-26 20:00:03,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 20:00:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 20:00:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:00:03,967 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 15 states. [2020-10-26 20:00:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:04,684 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-26 20:00:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:00:04,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-26 20:00:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:04,686 INFO L225 Difference]: With dead ends: 35 [2020-10-26 20:00:04,686 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 20:00:04,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-26 20:00:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 20:00:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 20:00:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 20:00:04,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-26 20:00:04,700 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-10-26 20:00:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:04,701 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-26 20:00:04,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 20:00:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-26 20:00:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 20:00:04,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:04,704 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:04,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:00:04,705 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash -516096985, now seen corresponding path program 12 times [2020-10-26 20:00:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:04,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163880093] [2020-10-26 20:00:04,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:05,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:05,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:00:05,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:05,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-26 20:00:05,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:00:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:05,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:05,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:05,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:05,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:05,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:05,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:05,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:05,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:05,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163880093] [2020-10-26 20:00:05,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:05,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 20:00:05,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815327040] [2020-10-26 20:00:05,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:00:05,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:00:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:00:05,344 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 16 states. [2020-10-26 20:00:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:06,151 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-26 20:00:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 20:00:06,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-26 20:00:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:06,152 INFO L225 Difference]: With dead ends: 36 [2020-10-26 20:00:06,153 INFO L226 Difference]: Without dead ends: 28 [2020-10-26 20:00:06,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:00:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-26 20:00:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-26 20:00:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 20:00:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-26 20:00:06,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-10-26 20:00:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:06,164 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-26 20:00:06,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:00:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-26 20:00:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 20:00:06,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:06,167 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:06,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:00:06,168 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash 623067167, now seen corresponding path program 13 times [2020-10-26 20:00:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:06,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164877375] [2020-10-26 20:00:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:06,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:06,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:06,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 20:00:06,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-26 20:00:06,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 20:00:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:00:06,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:06,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:07,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:07,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:07,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:07,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:00:07,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:07,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164877375] [2020-10-26 20:00:07,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:07,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 20:00:07,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134950399] [2020-10-26 20:00:07,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 20:00:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:07,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 20:00:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-26 20:00:07,019 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 17 states. [2020-10-26 20:00:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:07,892 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-26 20:00:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 20:00:07,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-26 20:00:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:07,894 INFO L225 Difference]: With dead ends: 37 [2020-10-26 20:00:07,894 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 20:00:07,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-26 20:00:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 20:00:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 20:00:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 20:00:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-26 20:00:07,912 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-10-26 20:00:07,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:07,913 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-26 20:00:07,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 20:00:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-26 20:00:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 20:00:07,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:07,918 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:07,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:00:07,918 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1577417511, now seen corresponding path program 14 times [2020-10-26 20:00:07,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204357983] [2020-10-26 20:00:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:07,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:08,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:08,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 20:00:08,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-26 20:00:08,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 20:00:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:08,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:00:08,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:08,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:08,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:08,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:08,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:08,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:00:08,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:08,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:08,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:08,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204357983] [2020-10-26 20:00:08,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:08,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:00:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029220925] [2020-10-26 20:00:08,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 20:00:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 20:00:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-26 20:00:08,843 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 18 states. [2020-10-26 20:00:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:09,848 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-26 20:00:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 20:00:09,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-26 20:00:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:09,849 INFO L225 Difference]: With dead ends: 38 [2020-10-26 20:00:09,849 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 20:00:09,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 20:00:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 20:00:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 20:00:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 20:00:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-26 20:00:09,859 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-10-26 20:00:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:09,860 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-26 20:00:09,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 20:00:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-26 20:00:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 20:00:09,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:09,861 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:09,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:00:09,861 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1097507103, now seen corresponding path program 15 times [2020-10-26 20:00:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:09,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500179084] [2020-10-26 20:00:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:10,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:10,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:00:10,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:00:10,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:10,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:00:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:00:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:00:10,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:00:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:00:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:00:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:00:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:00:10,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500179084] [2020-10-26 20:00:10,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:00:10,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 20:00:10,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797308010] [2020-10-26 20:00:10,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:00:10,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:00:10,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:00:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:00:10,757 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 19 states. [2020-10-26 20:00:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:00:11,760 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-26 20:00:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:00:11,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-26 20:00:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:00:11,763 INFO L225 Difference]: With dead ends: 39 [2020-10-26 20:00:11,764 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 20:00:11,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 20:00:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 20:00:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-26 20:00:11,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 20:00:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-26 20:00:11,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-10-26 20:00:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:00:11,781 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-26 20:00:11,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 20:00:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-26 20:00:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 20:00:11,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:00:11,782 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:00:11,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 20:00:11,786 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:00:11,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:00:11,787 INFO L82 PathProgramCache]: Analyzing trace with hash -894813657, now seen corresponding path program 16 times [2020-10-26 20:00:11,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:00:11,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355202829] [2020-10-26 20:00:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:00:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 20:00:11,807 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-26 20:00:11,807 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 20:00:11,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 20:00:11,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:00:11 BoogieIcfgContainer [2020-10-26 20:00:11,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 20:00:11,846 INFO L168 Benchmark]: Toolchain (without parser) took 18823.54 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 126.6 MB in the beginning and 167.2 MB in the end (delta: -40.7 MB). Peak memory consumption was 133.5 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:11,849 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-26 20:00:11,855 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.44 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:11,861 INFO L168 Benchmark]: Boogie Preprocessor took 44.87 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:11,861 INFO L168 Benchmark]: RCFGBuilder took 377.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 101.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:11,863 INFO L168 Benchmark]: TraceAbstraction took 18070.66 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 101.1 MB in the beginning and 167.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 108.3 MB. Max. memory is 8.0 GB. [2020-10-26 20:00:11,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.44 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.87 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 377.99 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 101.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18070.66 ms. Allocated memory was 151.0 MB in the beginning and 324.0 MB in the end (delta: 173.0 MB). Free memory was 101.1 MB in the beginning and 167.2 MB in the end (delta: -66.1 MB). Peak memory consumption was 108.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 56, overapproximation of bitwiseAnd at line 47. Possible FailurePath: [L34] unsigned short x = __VERIFIER_nondet_ushort(); [L35] unsigned short y = __VERIFIER_nondet_ushort(); [L36] unsigned int xx; [L37] unsigned int yy; [L38] unsigned int zz; [L39] unsigned int z = 0; [L40] unsigned int i = 0; [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND TRUE i < sizeof(x) * 8 [L42] z |= ((x & (1U << i)) << i) | ((y & (1U << i)) << (i + 1)) [L43] i += 1U [L41] COND FALSE !(i < sizeof(x) * 8) [L45] xx = x [L46] yy = y [L47] xx = (xx | (xx << 8u)) & 16711935U [L48] xx = (xx | (xx << 4u)) & 252645135U [L49] xx = (xx | (xx << 2u)) & 858993459U [L50] xx = (xx | (xx << 1u)) & 1431655765U [L51] yy = (yy | (yy << 8u)) & 16711935U [L52] yy = (yy | (yy << 4u)) & 252645135U [L53] yy = (yy | (yy << 2u)) & 858993459U [L54] yy = (yy | (yy << 1u)) & 1431655765U [L56] zz = xx | (yy << 1U) [L58] CALL __VERIFIER_assert(z == zz) [L16] COND TRUE !(cond) [L17] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "interleave_bits.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.9s, OverallIterations: 17, TraceHistogramMax: 16, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 213 SDtfs, 131 SDslu, 695 SDs, 0 SdLazy, 2185 SolverSat, 304 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 374 NumberOfCodeBlocks, 374 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 328 ConstructedInterpolants, 0 QuantifiedInterpolants, 35016 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/680 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...