/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 10:01:00,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 10:01:00,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 10:01:00,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 10:01:00,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 10:01:00,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 10:01:00,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 10:01:00,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 10:01:00,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 10:01:00,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 10:01:00,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 10:01:00,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 10:01:00,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 10:01:00,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 10:01:00,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 10:01:00,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 10:01:00,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 10:01:00,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 10:01:00,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 10:01:00,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 10:01:00,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 10:01:00,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 10:01:00,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 10:01:00,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 10:01:00,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 10:01:00,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 10:01:00,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 10:01:00,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 10:01:00,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 10:01:00,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 10:01:00,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 10:01:00,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 10:01:00,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 10:01:00,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 10:01:00,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 10:01:00,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 10:01:00,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 10:01:00,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 10:01:00,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 10:01:00,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 10:01:00,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 10:01:00,645 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 [2020-10-29 10:01:00,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 10:01:00,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 10:01:00,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 10:01:00,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 10:01:00,699 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 10:01:00,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 10:01:00,700 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 10:01:00,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 10:01:00,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 10:01:00,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 10:01:00,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 10:01:00,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 10:01:00,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 10:01:00,702 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 10:01:00,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 10:01:00,702 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 10:01:00,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 10:01:00,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 10:01:00,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 10:01:00,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 10:01:00,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 10:01:00,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 10:01:00,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 10:01:00,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 10:01:00,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 10:01:00,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 10:01:00,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 10:01:00,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 10:01:00,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 10:01:00,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 10:01:01,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 10:01:01,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 10:01:01,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 10:01:01,186 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 10:01:01,187 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 10:01:01,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-10-29 10:01:01,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f33f4fe27/5bf520e8eaa54a6c8cf5360208bde666/FLAG88a349c41 [2020-10-29 10:01:01,956 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 10:01:01,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-10-29 10:01:01,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f33f4fe27/5bf520e8eaa54a6c8cf5360208bde666/FLAG88a349c41 [2020-10-29 10:01:02,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f33f4fe27/5bf520e8eaa54a6c8cf5360208bde666 [2020-10-29 10:01:02,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 10:01:02,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 10:01:02,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:02,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 10:01:02,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 10:01:02,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108ee94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02, skipping insertion in model container [2020-10-29 10:01:02,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 10:01:02,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 10:01:02,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:02,557 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 10:01:02,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:01:02,593 INFO L208 MainTranslator]: Completed translation [2020-10-29 10:01:02,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02 WrapperNode [2020-10-29 10:01:02,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 10:01:02,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 10:01:02,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 10:01:02,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 10:01:02,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (1/1) ... [2020-10-29 10:01:02,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 10:01:02,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 10:01:02,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 10:01:02,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 10:01:02,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (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 [2020-10-29 10:01:02,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 10:01:02,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 10:01:02,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 10:01:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 10:01:02,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 10:01:02,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 10:01:02,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 10:01:02,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 10:01:02,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 10:01:02,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 10:01:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 10:01:02,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 10:01:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 10:01:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 10:01:02,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 10:01:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 10:01:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 10:01:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 10:01:02,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 10:01:02,975 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 10:01:02,976 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 10:01:02,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:02 BoogieIcfgContainer [2020-10-29 10:01:02,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 10:01:02,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 10:01:02,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 10:01:02,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 10:01:02,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 10:01:02" (1/3) ... [2020-10-29 10:01:02,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2768466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:02, skipping insertion in model container [2020-10-29 10:01:02,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:01:02" (2/3) ... [2020-10-29 10:01:02,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2768466b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:01:02, skipping insertion in model container [2020-10-29 10:01:02,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:01:02" (3/3) ... [2020-10-29 10:01:02,995 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-10-29 10:01:03,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 10:01:03,033 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 10:01:03,070 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 10:01:03,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 10:01:03,125 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 10:01:03,125 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 10:01:03,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 10:01:03,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 10:01:03,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 10:01:03,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 10:01:03,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 10:01:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 10:01:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 10:01:03,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:03,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:03,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:03,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-29 10:01:03,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:03,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718442516] [2020-10-29 10:01:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:03,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:03,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:03,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:03,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 10:01:03,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:01:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-29 10:01:03,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:03,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:01:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:03,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 10:01:03,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 10:01:03,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:03,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:03,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:03,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:03,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:03,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 10:01:03,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:03,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:03,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:03,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:03,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718442516] [2020-10-29 10:01:03,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:01:03,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 10:01:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266745614] [2020-10-29 10:01:03,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:01:03,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:01:03,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:01:03,961 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 10:01:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:04,224 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-10-29 10:01:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 10:01:04,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-29 10:01:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:04,234 INFO L225 Difference]: With dead ends: 48 [2020-10-29 10:01:04,234 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 10:01:04,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:01:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 10:01:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 10:01:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 10:01:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-29 10:01:04,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-29 10:01:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:04,282 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-29 10:01:04,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:01:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-29 10:01:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 10:01:04,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:04,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:04,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 10:01:04,284 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-29 10:01:04,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:04,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489679569] [2020-10-29 10:01:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:04,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:04,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:04,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 10:01:04,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:01:04,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-29 10:01:04,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:04,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:04,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 10:01:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:04,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 10:01:04,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 10:01:04,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:04,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:04,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:01:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:04,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:04,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:04,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:04,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:04,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:04,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489679569] [2020-10-29 10:01:04,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:04,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 10:01:04,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882621059] [2020-10-29 10:01:04,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 10:01:04,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 10:01:04,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 10:01:04,488 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-10-29 10:01:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:04,673 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-29 10:01:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 10:01:04,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 10:01:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:04,676 INFO L225 Difference]: With dead ends: 35 [2020-10-29 10:01:04,676 INFO L226 Difference]: Without dead ends: 22 [2020-10-29 10:01:04,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:01:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-29 10:01:04,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-29 10:01:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 10:01:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-29 10:01:04,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-29 10:01:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:04,690 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-29 10:01:04,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 10:01:04,690 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-29 10:01:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 10:01:04,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:04,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:04,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 10:01:04,692 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-10-29 10:01:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:04,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89388166] [2020-10-29 10:01:04,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:04,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:04,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:04,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:05,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 10:01:05,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 10:01:05,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-29 10:01:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:05,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:01:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 10:01:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:05,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:05,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:05,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:05,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:01:05,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:05,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:05,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:05,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:05,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89388166] [2020-10-29 10:01:05,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:05,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 10:01:05,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414413702] [2020-10-29 10:01:05,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:01:05,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:01:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:01:05,113 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-10-29 10:01:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:05,243 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-29 10:01:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 10:01:05,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-29 10:01:05,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:05,245 INFO L225 Difference]: With dead ends: 35 [2020-10-29 10:01:05,245 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 10:01:05,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:01:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 10:01:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 10:01:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 10:01:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-29 10:01:05,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-10-29 10:01:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:05,254 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-29 10:01:05,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:01:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-29 10:01:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 10:01:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:05,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:05,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 10:01:05,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 701699446, now seen corresponding path program 3 times [2020-10-29 10:01:05,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:05,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746120091] [2020-10-29 10:01:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:05,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:05,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 10:01:05,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 10:01:05,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-29 10:01:05,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:05,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:05,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 10:01:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 10:01:05,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:05,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:05,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:05,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:05,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:05,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:05,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:05,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:05,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:05,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746120091] [2020-10-29 10:01:05,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:05,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 10:01:05,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453799493] [2020-10-29 10:01:05,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 10:01:05,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 10:01:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 10:01:05,647 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-10-29 10:01:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:05,817 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-29 10:01:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 10:01:05,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-29 10:01:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:05,819 INFO L225 Difference]: With dead ends: 35 [2020-10-29 10:01:05,819 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 10:01:05,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:01:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 10:01:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-29 10:01:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 10:01:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-29 10:01:05,827 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-29 10:01:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:05,828 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-29 10:01:05,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 10:01:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-29 10:01:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 10:01:05,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:05,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:05,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 10:01:05,829 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash -312331939, now seen corresponding path program 1 times [2020-10-29 10:01:05,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:05,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915725804] [2020-10-29 10:01:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:05,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:06,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:06,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 10:01:06,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 10:01:06,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-29 10:01:06,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:06,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:06,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:01:06,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 10:01:06,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 10:01:06,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:06,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:06,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:06,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:06,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:06,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:06,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:06,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:06,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:06,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:06,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:06,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:06,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:06,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915725804] [2020-10-29 10:01:06,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:06,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:01:06,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267530152] [2020-10-29 10:01:06,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:01:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:06,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:01:06,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:01:06,385 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-29 10:01:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:06,585 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2020-10-29 10:01:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:01:06,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-29 10:01:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:06,588 INFO L225 Difference]: With dead ends: 44 [2020-10-29 10:01:06,588 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 10:01:06,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:01:06,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 10:01:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-29 10:01:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 10:01:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-29 10:01:06,598 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 25 [2020-10-29 10:01:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:06,598 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-29 10:01:06,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:01:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-29 10:01:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 10:01:06,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:06,600 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:06,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 10:01:06,600 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -218832202, now seen corresponding path program 2 times [2020-10-29 10:01:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:06,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695185814] [2020-10-29 10:01:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:06,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:06,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:06,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 10:01:06,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:01:06,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-29 10:01:06,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:06,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 10:01:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:06,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 10:01:06,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:06,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:06,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:06,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:06,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:06,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:06,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:06,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:06,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:06,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:06,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695185814] [2020-10-29 10:01:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:01:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175892805] [2020-10-29 10:01:06,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:01:06,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:06,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:01:06,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:01:06,889 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-10-29 10:01:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:07,208 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-29 10:01:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 10:01:07,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-29 10:01:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:07,210 INFO L225 Difference]: With dead ends: 45 [2020-10-29 10:01:07,210 INFO L226 Difference]: Without dead ends: 38 [2020-10-29 10:01:07,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-29 10:01:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-29 10:01:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-29 10:01:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-29 10:01:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-29 10:01:07,219 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2020-10-29 10:01:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:07,219 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-29 10:01:07,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:01:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-29 10:01:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 10:01:07,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:07,221 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:07,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 10:01:07,221 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -504472547, now seen corresponding path program 3 times [2020-10-29 10:01:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:07,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681665931] [2020-10-29 10:01:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 10:01:07,235 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 10:01:07,235 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 10:01:07,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 10:01:07,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 10:01:07 BoogieIcfgContainer [2020-10-29 10:01:07,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 10:01:07,259 INFO L168 Benchmark]: Toolchain (without parser) took 4943.08 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 128.2 MB in the beginning and 67.0 MB in the end (delta: 61.2 MB). Peak memory consumption was 93.1 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:07,260 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 10:01:07,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.84 ms. Allocated memory is still 153.1 MB. Free memory was 127.6 MB in the beginning and 118.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:07,261 INFO L168 Benchmark]: Boogie Preprocessor took 37.31 ms. Allocated memory is still 153.1 MB. Free memory was 118.0 MB in the beginning and 116.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:07,262 INFO L168 Benchmark]: RCFGBuilder took 344.72 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 103.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:07,263 INFO L168 Benchmark]: TraceAbstraction took 4276.71 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 103.5 MB in the beginning and 67.0 MB in the end (delta: 36.6 MB). Peak memory consumption was 69.0 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:07,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.84 ms. Allocated memory is still 153.1 MB. Free memory was 127.6 MB in the beginning and 118.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.31 ms. Allocated memory is still 153.1 MB. Free memory was 118.0 MB in the beginning and 116.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 344.72 ms. Allocated memory is still 153.1 MB. Free memory was 116.5 MB in the beginning and 103.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4276.71 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 103.5 MB in the beginning and 67.0 MB in the end (delta: 36.6 MB). Peak memory consumption was 69.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L28] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum04-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 177 SDslu, 156 SDs, 0 SdLazy, 273 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 123 ConstructedInterpolants, 0 QuantifiedInterpolants, 8643 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 7/110 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 incorrect! Received shutdown request...