/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:04,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:04,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:04,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:04,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:04,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:04,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:04,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:04,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:04,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:04,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:04,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:04,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:04,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:04,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:04,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:04,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:04,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:04,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:04,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:04,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:04,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:04,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:04,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:04,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:04,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:04,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:04,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:04,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:04,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:04,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:04,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:04,757 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:04,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:04,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:04,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:04,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:04,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:04,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:04,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:04,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:04,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:04,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:04,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:04,760 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:04,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:04,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:04,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:04,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:04,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:04,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:04,762 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:05,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:05,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:05,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:05,195 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:05,199 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:05,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-11-07 06:34:05,293 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b20fde64/1c9f18bf30454c0da667641e96656caf/FLAGad272a729 [2020-11-07 06:34:05,953 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:05,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-11-07 06:34:05,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b20fde64/1c9f18bf30454c0da667641e96656caf/FLAGad272a729 [2020-11-07 06:34:06,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b20fde64/1c9f18bf30454c0da667641e96656caf [2020-11-07 06:34:06,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:06,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:06,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:06,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:06,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:06,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381cd4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06, skipping insertion in model container [2020-11-07 06:34:06,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:06,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:06,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:06,624 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:06,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:06,693 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:06,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06 WrapperNode [2020-11-07 06:34:06,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:06,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:06,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:06,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:06,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... [2020-11-07 06:34:06,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:06,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:06,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:06,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:06,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 06:34:06,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:06,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:06,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 06:34:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:06,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:06,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:06,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 06:34:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 06:34:06,892 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:07,472 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:07,473 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-07 06:34:07,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:07 BoogieIcfgContainer [2020-11-07 06:34:07,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:07,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:07,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:07,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:07,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:06" (1/3) ... [2020-11-07 06:34:07,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d456bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:07, skipping insertion in model container [2020-11-07 06:34:07,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:06" (2/3) ... [2020-11-07 06:34:07,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d456bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:07, skipping insertion in model container [2020-11-07 06:34:07,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:07" (3/3) ... [2020-11-07 06:34:07,485 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-11-07 06:34:07,503 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:07,507 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:07,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:07,551 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:07,551 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:07,551 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:07,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:07,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:07,552 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:07,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:07,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:07,569 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-07 06:34:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:07,580 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:07,582 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash -341341850, now seen corresponding path program 1 times [2020-11-07 06:34:07,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247320859] [2020-11-07 06:34:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:07,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247320859] [2020-11-07 06:34:07,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:07,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:34:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188779042] [2020-11-07 06:34:07,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:34:07,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:34:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:07,937 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-11-07 06:34:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,149 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-11-07 06:34:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:34:08,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-07 06:34:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,160 INFO L225 Difference]: With dead ends: 111 [2020-11-07 06:34:08,161 INFO L226 Difference]: Without dead ends: 53 [2020-11-07 06:34:08,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:34:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-07 06:34:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-07 06:34:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-07 06:34:08,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-11-07 06:34:08,222 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 36 [2020-11-07 06:34:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,222 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-11-07 06:34:08,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:34:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-11-07 06:34:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-07 06:34:08,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:08,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:08,225 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1000671319, now seen corresponding path program 1 times [2020-11-07 06:34:08,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900671854] [2020-11-07 06:34:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900671854] [2020-11-07 06:34:08,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:08,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972269431] [2020-11-07 06:34:08,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:08,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:08,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:08,451 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 5 states. [2020-11-07 06:34:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,742 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-07 06:34:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 06:34:08,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-07 06:34:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,745 INFO L225 Difference]: With dead ends: 88 [2020-11-07 06:34:08,745 INFO L226 Difference]: Without dead ends: 62 [2020-11-07 06:34:08,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-07 06:34:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-07 06:34:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-07 06:34:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-07 06:34:08,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 36 [2020-11-07 06:34:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,763 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-07 06:34:08,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-07 06:34:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-07 06:34:08,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:08,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:08,766 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash -546938271, now seen corresponding path program 1 times [2020-11-07 06:34:08,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719623871] [2020-11-07 06:34:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 06:34:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719623871] [2020-11-07 06:34:09,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:09,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 06:34:09,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567887754] [2020-11-07 06:34:09,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 06:34:09,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 06:34:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:34:09,007 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 8 states. [2020-11-07 06:34:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:09,602 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-11-07 06:34:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:34:09,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-11-07 06:34:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:09,605 INFO L225 Difference]: With dead ends: 73 [2020-11-07 06:34:09,605 INFO L226 Difference]: Without dead ends: 66 [2020-11-07 06:34:09,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-07 06:34:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-07 06:34:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-11-07 06:34:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 06:34:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-07 06:34:09,621 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 48 [2020-11-07 06:34:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:09,622 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-07 06:34:09,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 06:34:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-07 06:34:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-11-07 06:34:09,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:09,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:09,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:09,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash -20855722, now seen corresponding path program 1 times [2020-11-07 06:34:09,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:09,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597830252] [2020-11-07 06:34:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:09,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597830252] [2020-11-07 06:34:09,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:09,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-07 06:34:09,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882205692] [2020-11-07 06:34:09,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-07 06:34:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-07 06:34:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:34:09,838 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 10 states. [2020-11-07 06:34:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:10,221 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-11-07 06:34:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-07 06:34:10,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-11-07 06:34:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:10,223 INFO L225 Difference]: With dead ends: 101 [2020-11-07 06:34:10,224 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 06:34:10,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-07 06:34:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 06:34:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2020-11-07 06:34:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:34:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-11-07 06:34:10,238 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-11-07 06:34:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:10,238 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-11-07 06:34:10,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-07 06:34:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-11-07 06:34:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:34:10,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:10,241 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:10,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:10,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:10,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1036949453, now seen corresponding path program 2 times [2020-11-07 06:34:10,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906401116] [2020-11-07 06:34:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 06:34:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 06:34:10,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906401116] [2020-11-07 06:34:10,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:10,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-07 06:34:10,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871987235] [2020-11-07 06:34:10,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 06:34:10,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 06:34:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:10,469 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 6 states. [2020-11-07 06:34:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:10,704 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-11-07 06:34:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:34:10,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-11-07 06:34:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:10,706 INFO L225 Difference]: With dead ends: 101 [2020-11-07 06:34:10,706 INFO L226 Difference]: Without dead ends: 69 [2020-11-07 06:34:10,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-07 06:34:10,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-07 06:34:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-11-07 06:34:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-07 06:34:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-11-07 06:34:10,723 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-11-07 06:34:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:10,723 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-11-07 06:34:10,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 06:34:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-11-07 06:34:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-07 06:34:10,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:10,725 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:10,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:34:10,726 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1144764371, now seen corresponding path program 1 times [2020-11-07 06:34:10,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:10,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58967452] [2020-11-07 06:34:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:10,794 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 06:34:10,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 06:34:10,898 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 06:34:10,898 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 06:34:10,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:34:10,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:34:10 BoogieIcfgContainer [2020-11-07 06:34:10,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:34:11,001 INFO L168 Benchmark]: Toolchain (without parser) took 4662.34 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 127.8 MB in the beginning and 118.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:11,002 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:34:11,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.20 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 116.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:11,006 INFO L168 Benchmark]: Boogie Preprocessor took 78.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:11,009 INFO L168 Benchmark]: RCFGBuilder took 699.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 128.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:11,013 INFO L168 Benchmark]: TraceAbstraction took 3518.45 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 127.8 MB in the beginning and 118.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 46.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:34:11,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 346.20 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 116.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 699.48 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 128.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3518.45 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 127.8 MB in the beginning and 118.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 46.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=2, N=2] [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; VAL [\old(N)=0, N=2] [L28] long long sum[1]; VAL [\old(N)=0, N=2, sum={5:0}] [L29] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L31] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={5:0}] [L31] COND TRUE i