/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:01:38,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:01:38,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:01:38,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:01:38,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:01:38,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:01:38,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:01:38,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:01:38,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:01:38,483 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:01:38,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:01:38,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:01:38,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:01:38,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:01:38,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:01:38,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:01:38,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:01:38,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:01:38,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:01:38,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:01:38,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:01:38,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:01:38,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:01:38,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:01:38,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:01:38,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:01:38,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:01:38,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:01:38,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:01:38,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:01:38,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:01:38,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:01:38,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:01:38,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:01:38,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:01:38,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:01:38,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:01:38,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:01:38,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:01:38,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:01:38,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:01:38,575 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 [2020-10-28 15:01:38,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:01:38,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:01:38,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:01:38,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:01:38,635 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:01:38,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:01:38,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:01:38,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:01:38,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:01:38,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:01:38,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:01:38,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:01:38,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:01:38,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:01:38,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:01:38,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:01:38,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:01:38,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:01:38,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:01:38,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:01:38,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:01:38,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:01:38,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:01:38,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:01:38,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:01:38,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:01:38,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:01:38,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:01:38,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:01:38,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:01:39,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:01:39,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:01:39,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:01:39,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:01:39,156 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:01:39,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-28 15:01:39,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abff7b4e5/a16170aef36d4c8fa69cdf82657b8c63/FLAGc3692a352 [2020-10-28 15:01:39,985 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:01:39,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-28 15:01:39,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abff7b4e5/a16170aef36d4c8fa69cdf82657b8c63/FLAGc3692a352 [2020-10-28 15:01:40,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/abff7b4e5/a16170aef36d4c8fa69cdf82657b8c63 [2020-10-28 15:01:40,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:01:40,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:01:40,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:40,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:01:40,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:01:40,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d913064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40, skipping insertion in model container [2020-10-28 15:01:40,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:01:40,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:01:40,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:40,657 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:01:40,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:01:40,701 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:01:40,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40 WrapperNode [2020-10-28 15:01:40,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:01:40,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:01:40,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:01:40,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:01:40,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (1/1) ... [2020-10-28 15:01:40,747 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:01:40,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:01:40,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:01:40,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:01:40,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (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 [2020-10-28 15:01:40,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:01:40,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:01:40,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:01:40,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:01:40,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:01:40,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:01:40,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:01:40,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:01:40,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:01:40,846 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:01:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:01:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:01:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:01:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:01:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:01:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:01:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:01:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:01:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:01:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:01:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:01:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:01:41,363 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:01:41,364 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 15:01:41,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:41 BoogieIcfgContainer [2020-10-28 15:01:41,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:01:41,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:01:41,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:01:41,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:01:41,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:01:40" (1/3) ... [2020-10-28 15:01:41,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263ab741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:41, skipping insertion in model container [2020-10-28 15:01:41,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:01:40" (2/3) ... [2020-10-28 15:01:41,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263ab741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:01:41, skipping insertion in model container [2020-10-28 15:01:41,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:01:41" (3/3) ... [2020-10-28 15:01:41,380 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-28 15:01:41,403 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:01:41,415 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:01:41,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:01:41,486 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:01:41,486 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:01:41,486 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:01:41,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:01:41,487 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:01:41,487 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:01:41,487 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:01:41,487 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:01:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-28 15:01:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:01:41,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:41,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:41,511 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1195393588, now seen corresponding path program 1 times [2020-10-28 15:01:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:41,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771001780] [2020-10-28 15:01:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:41,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:41,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:42,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:01:42,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:01:42,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-28 15:01:42,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:42,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:01:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:01:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 15:01:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:42,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:42,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:42,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:42,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:42,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:01:42,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:42,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:42,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:42,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771001780] [2020-10-28 15:01:42,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:42,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793471385] [2020-10-28 15:01:42,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:42,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:42,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:42,860 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-10-28 15:01:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:43,215 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2020-10-28 15:01:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:01:43,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 15:01:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:43,226 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:01:43,226 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:01:43,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:01:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 15:01:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:01:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-28 15:01:43,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 20 [2020-10-28 15:01:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:43,280 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-28 15:01:43,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-28 15:01:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:01:43,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:43,282 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:43,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:01:43,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash 146928195, now seen corresponding path program 1 times [2020-10-28 15:01:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:43,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565254778] [2020-10-28 15:01:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:43,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:44,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:44,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:01:44,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:01:44,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 819 [2020-10-28 15:01:44,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:44,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:01:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:01:44,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:01:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:01:44,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:44,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:44,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:44,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:44,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:44,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:44,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:44,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:44,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:44,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:44,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:44,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565254778] [2020-10-28 15:01:44,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:44,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:01:44,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179086076] [2020-10-28 15:01:44,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:01:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:01:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:01:44,356 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2020-10-28 15:01:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:45,007 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 15:01:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:45,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 15:01:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:45,009 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:01:45,009 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:01:45,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:01:45,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:01:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-28 15:01:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:01:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 15:01:45,023 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 23 [2020-10-28 15:01:45,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:45,024 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 15:01:45,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:01:45,024 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 15:01:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:01:45,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:45,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:01:45,026 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash -846334350, now seen corresponding path program 1 times [2020-10-28 15:01:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:45,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37431723] [2020-10-28 15:01:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:45,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:47,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:48,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:01:48,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:01:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3490 [2020-10-28 15:01:48,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:48,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:01:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:01:48,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:48,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:48,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:48,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:48,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:48,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:48,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:48,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:01:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37431723] [2020-10-28 15:01:48,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:48,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408596848] [2020-10-28 15:01:48,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:48,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:48,601 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2020-10-28 15:01:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:48,775 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2020-10-28 15:01:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:01:48,775 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-28 15:01:48,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:48,777 INFO L225 Difference]: With dead ends: 65 [2020-10-28 15:01:48,777 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:01:48,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:01:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 15:01:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:01:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 15:01:48,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-28 15:01:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:48,789 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 15:01:48,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:48,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 15:01:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:01:48,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:48,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:48,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:01:48,791 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1845977140, now seen corresponding path program 1 times [2020-10-28 15:01:48,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:48,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542329138] [2020-10-28 15:01:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:48,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:48,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:50,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:51,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:52,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:53,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:53,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:01:53,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:01:53,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:01:53,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:53,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:53,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:53,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:53,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:53,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:53,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:01:53,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:53,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:53,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:53,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:53,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:01:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:53,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:53,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:53,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:01:53,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:53,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:01:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:53,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:53,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:01:53,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542329138] [2020-10-28 15:01:53,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:53,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:01:53,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450361670] [2020-10-28 15:01:53,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:01:53,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:01:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:01:53,954 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 10 states. [2020-10-28 15:01:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:54,535 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-28 15:01:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:01:54,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 15:01:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:54,537 INFO L225 Difference]: With dead ends: 57 [2020-10-28 15:01:54,537 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:01:54,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:01:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:01:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-28 15:01:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:01:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 15:01:54,551 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 33 [2020-10-28 15:01:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:54,552 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 15:01:54,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:01:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 15:01:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 15:01:54,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:54,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:54,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:01:54,554 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash -891374059, now seen corresponding path program 2 times [2020-10-28 15:01:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:54,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834520446] [2020-10-28 15:01:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:54,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:54,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:54,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:54,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:55,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:57,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:58,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 15:01:59,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 15:01:59,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:01:59,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:01:59,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:01:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 15:01:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:01:59,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:59,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:59,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:01:59,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:01:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:01:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:01:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:59,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:59,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 15:01:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:59,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:59,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:59,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:59,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:59,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:59,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:59,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:01:59,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:59,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-28 15:01:59,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834520446] [2020-10-28 15:01:59,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:59,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:01:59,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823317334] [2020-10-28 15:01:59,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:01:59,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:01:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:59,761 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 8 states. [2020-10-28 15:02:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:00,053 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 15:02:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:00,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-28 15:02:00,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:00,057 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:02:00,057 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 15:02:00,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 15:02:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2020-10-28 15:02:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:02:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-28 15:02:00,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 43 [2020-10-28 15:02:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:00,071 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-28 15:02:00,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-28 15:02:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:02:00,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:00,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:00,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:02:00,073 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:00,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:00,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1738408727, now seen corresponding path program 3 times [2020-10-28 15:02:00,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:00,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645910904] [2020-10-28 15:02:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:01,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:02:05,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 15:02:05,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 15:02:05,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:02:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 15:02:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:05,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:05,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:05,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:05,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 15:02:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:05,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:05,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 15:02:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:05,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 15:02:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:05,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:05,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 15:02:05,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645910904] [2020-10-28 15:02:05,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:05,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597876277] [2020-10-28 15:02:05,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:05,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:05,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:05,200 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 7 states. [2020-10-28 15:02:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:05,610 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2020-10-28 15:02:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:02:05,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-28 15:02:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:05,614 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:02:05,614 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 15:02:05,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 15:02:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-28 15:02:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:02:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-28 15:02:05,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 50 [2020-10-28 15:02:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:05,637 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-28 15:02:05,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-28 15:02:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 15:02:05,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:05,640 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:05,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:02:05,640 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1224887630, now seen corresponding path program 4 times [2020-10-28 15:02:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:05,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253526967] [2020-10-28 15:02:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:05,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:05,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:07,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:08,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:10,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:02:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 15:02:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:10,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:10,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:10,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:10,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:10,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:10,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:02:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:10,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 15:02:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:10,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:10,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:10,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:10,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:10,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:10,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 15:02:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:10,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:10,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:10,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:10,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 15:02:10,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253526967] [2020-10-28 15:02:10,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:10,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:10,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044892910] [2020-10-28 15:02:10,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:10,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:10,774 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 7 states. [2020-10-28 15:02:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:11,052 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2020-10-28 15:02:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:11,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 15:02:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:11,055 INFO L225 Difference]: With dead ends: 122 [2020-10-28 15:02:11,055 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 15:02:11,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 15:02:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2020-10-28 15:02:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:02:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-28 15:02:11,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 53 [2020-10-28 15:02:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:11,079 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-28 15:02:11,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-28 15:02:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:02:11,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:11,080 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:11,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:02:11,081 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1594667572, now seen corresponding path program 5 times [2020-10-28 15:02:11,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:11,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398366074] [2020-10-28 15:02:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:16,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:02:16,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 15:02:16,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:16,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:16,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:16,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:16,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:16,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 15:02:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:16,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:02:16,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:16,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 15:02:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:16,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:16,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:16,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:16,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 15:02:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:16,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 15:02:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:16,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 15:02:16,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398366074] [2020-10-28 15:02:16,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:16,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273193518] [2020-10-28 15:02:16,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:16,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:16,295 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 8 states. [2020-10-28 15:02:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:16,579 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-28 15:02:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:16,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-28 15:02:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:16,580 INFO L225 Difference]: With dead ends: 67 [2020-10-28 15:02:16,580 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:02:16,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:02:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:02:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:02:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:02:16,582 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2020-10-28 15:02:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:16,583 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:02:16,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:02:16,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:02:16,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:02:16,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:02:17,351 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-28 15:02:17,353 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 15:02:17,354 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 15:02:17,354 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:02:17,354 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 15:02:17,355 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 15:02:17,355 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:02:17,355 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 15:02:17,355 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:02:17,355 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:02:17,355 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:02:17,355 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:17,356 INFO L274 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-10-28 15:02:17,358 INFO L270 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse4 (* 2 main_~i~0))) (let ((.cse0 (<= .cse4 main_~j~0)) (.cse3 (+ main_~i~0 (* 2 main_~n~0))) (.cse1 (<= 0 main_~i~0)) (.cse2 (<= (+ main_~i~0 1) main_~n~0))) (or (and .cse0 .cse1 .cse2 (<= (+ main_~j~0 3) .cse3)) (and .cse0 (<= main_~i~0 0) (<= (+ main_~j~0 2) .cse3) .cse1) (and (<= main_~j~0 (+ main_~k~0 1)) (<= 1 main_~i~0) (<= (+ .cse4 1) main_~j~0) .cse2)))) [2020-10-28 15:02:17,358 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-28 15:02:17,358 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 25 40) no Hoare annotation was computed. [2020-10-28 15:02:17,358 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= 1 main_~i~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) [2020-10-28 15:02:17,358 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-28 15:02:17,358 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= 1 main_~i~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) [2020-10-28 15:02:17,359 INFO L274 CegarLoopResult]: For program point L37-1(lines 36 37) no Hoare annotation was computed. [2020-10-28 15:02:17,359 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-28 15:02:17,359 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-28 15:02:17,359 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 25 40) no Hoare annotation was computed. [2020-10-28 15:02:17,360 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-10-28 15:02:17,360 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-10-28 15:02:17,360 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 0 main_~i~0))) (or (and (<= 1 main_~n~0) .cse0) (and (<= main_~i~0 0) .cse0))) [2020-10-28 15:02:17,361 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-28 15:02:17,361 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2020-10-28 15:02:17,362 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:02:17,362 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-28 15:02:17,362 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:02:17,362 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:02:17,362 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-28 15:02:17,362 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-28 15:02:17,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:02:17 BoogieIcfgContainer [2020-10-28 15:02:17,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:02:17,400 INFO L168 Benchmark]: Toolchain (without parser) took 37040.68 ms. Allocated memory was 159.4 MB in the beginning and 480.2 MB in the end (delta: 320.9 MB). Free memory was 134.5 MB in the beginning and 292.7 MB in the end (delta: -158.2 MB). Peak memory consumption was 163.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:17,401 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 159.4 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:02:17,402 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.32 ms. Allocated memory is still 159.4 MB. Free memory was 133.9 MB in the beginning and 124.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:17,403 INFO L168 Benchmark]: Boogie Preprocessor took 43.99 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 122.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:17,404 INFO L168 Benchmark]: RCFGBuilder took 618.15 ms. Allocated memory is still 159.4 MB. Free memory was 122.6 MB in the beginning and 106.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:17,405 INFO L168 Benchmark]: TraceAbstraction took 36021.18 ms. Allocated memory was 159.4 MB in the beginning and 480.2 MB in the end (delta: 320.9 MB). Free memory was 106.4 MB in the beginning and 292.7 MB in the end (delta: -186.2 MB). Peak memory consumption was 135.2 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:17,418 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 159.4 MB. Free memory is still 131.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 341.32 ms. Allocated memory is still 159.4 MB. Free memory was 133.9 MB in the beginning and 124.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.99 ms. Allocated memory is still 159.4 MB. Free memory was 124.2 MB in the beginning and 122.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 618.15 ms. Allocated memory is still 159.4 MB. Free memory was 122.6 MB in the beginning and 106.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 36021.18 ms. Allocated memory was 159.4 MB in the beginning and 480.2 MB in the end (delta: 320.9 MB). Free memory was 106.4 MB in the beginning and 292.7 MB in the end (delta: -186.2 MB). Peak memory consumption was 135.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((2 * i <= j && 1 <= i) && i + 1 <= n) && j + 3 <= i + 2 * n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (1 <= n && 0 <= i) || (i <= 0 && 0 <= i) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && 0 <= i) && i + 1 <= n) && j + 3 <= i + 2 * n) || (((2 * i <= j && i <= 0) && j + 2 <= i + 2 * n) && 0 <= i)) || (((j <= k + 1 && 1 <= i) && 2 * i + 1 <= j) && i + 1 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 35.0s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 300 SDslu, 202 SDs, 0 SdLazy, 768 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 55 PreInvPairs, 86 NumberOfFragments, 169 HoareAnnotationTreeSize, 55 FomulaSimplifications, 2914 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1024 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 31.4s InterpolantComputationTime, 308 NumberOfCodeBlocks, 308 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 37992 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 186/238 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...