/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:16:47,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:16:47,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:16:47,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:16:47,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:16:47,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:16:47,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:16:47,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:16:47,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:16:47,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:16:47,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:16:47,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:16:47,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:16:47,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:16:47,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:16:47,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:16:47,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:16:47,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:16:47,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:16:47,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:16:47,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:16:47,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:16:47,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:16:47,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:16:47,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:16:47,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:16:47,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:16:47,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:16:47,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:16:47,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:16:47,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:16:47,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:16:47,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:16:47,732 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:16:47,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:16:47,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:16:47,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:16:47,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:16:47,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:16:47,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:16:47,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:16:47,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:16:47,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:16:47,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:16:47,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:16:47,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:16:47,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:16:47,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:16:47,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:16:47,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:16:47,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:47,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:16:47,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:16:47,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:16:47,737 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:16:47,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:16:47,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:16:47,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:16:47,738 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:16:48,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:16:48,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:16:48,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:16:48,173 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:16:48,174 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:16:48,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-10-23 18:16:48,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b1ca250/6420101720f847a6b3a41a78280fcd82/FLAGa0619492f [2020-10-23 18:16:48,794 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:16:48,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-10-23 18:16:48,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b1ca250/6420101720f847a6b3a41a78280fcd82/FLAGa0619492f [2020-10-23 18:16:49,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89b1ca250/6420101720f847a6b3a41a78280fcd82 [2020-10-23 18:16:49,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:16:49,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:16:49,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:49,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:16:49,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:16:49,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7ddbf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49, skipping insertion in model container [2020-10-23 18:16:49,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:16:49,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:16:49,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:49,366 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:16:49,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:49,398 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:16:49,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49 WrapperNode [2020-10-23 18:16:49,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:49,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:16:49,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:16:49,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:16:49,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (1/1) ... [2020-10-23 18:16:49,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:16:49,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:16:49,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:16:49,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:16:49,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (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 [2020-10-23 18:16:49,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:16:49,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:16:49,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:16:49,496 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:16:49,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:16:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:16:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:16:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:16:49,496 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:16:49,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:16:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:16:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:16:49,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:16:49,943 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:16:49,944 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:16:49,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:49 BoogieIcfgContainer [2020-10-23 18:16:49,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:16:49,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:16:49,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:16:49,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:16:49,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:16:49" (1/3) ... [2020-10-23 18:16:49,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e4d14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:49, skipping insertion in model container [2020-10-23 18:16:49,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:49" (2/3) ... [2020-10-23 18:16:49,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e4d14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:49, skipping insertion in model container [2020-10-23 18:16:49,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:49" (3/3) ... [2020-10-23 18:16:49,959 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2020-10-23 18:16:49,998 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:16:50,009 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:16:50,043 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:16:50,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:16:50,090 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:16:50,090 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:16:50,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:16:50,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:16:50,090 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:16:50,090 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:16:50,090 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:16:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:16:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:16:50,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:50,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:50,126 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:16:50,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:50,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736582968] [2020-10-23 18:16:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:16:50,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736582968] [2020-10-23 18:16:50,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:16:50,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:16:50,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60261493] [2020-10-23 18:16:50,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:16:50,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:16:50,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:16:50,520 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:16:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:50,778 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:16:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:16:50,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:16:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:50,792 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:16:50,793 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:16:50,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:16:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:16:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:16:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:16:50,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:16:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:50,872 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:16:50,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:16:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:16:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:16:50,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:50,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:50,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:16:50,879 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:16:50,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:50,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149614264] [2020-10-23 18:16:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:16:51,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149614264] [2020-10-23 18:16:51,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470789480] [2020-10-23 18:16:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:16:51,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:16:51,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:51,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 18:16:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357765552] [2020-10-23 18:16:51,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:16:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:16:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:51,315 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-23 18:16:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:51,571 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:16:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:16:51,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:16:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:51,573 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:16:51,573 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:16:51,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:16:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:16:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:16:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:16:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:16:51,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:16:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:51,588 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:16:51,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:16:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:16:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:16:51,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:51,589 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:51,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:16:51,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:16:51,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:51,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769130740] [2020-10-23 18:16:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:51,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:52,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769130740] [2020-10-23 18:16:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129348012] [2020-10-23 18:16:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:52,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:52,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:52,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:16:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:52,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:52,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-10-23 18:16:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102478429] [2020-10-23 18:16:52,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:16:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:16:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:16:52,217 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-10-23 18:16:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:52,478 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:16:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:16:52,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-23 18:16:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:52,480 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:16:52,480 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:16:52,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:16:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:16:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:16:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:16:52,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:16:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:52,489 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:16:52,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:16:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:16:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:16:52,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:52,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:52,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:52,696 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:16:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:52,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876923314] [2020-10-23 18:16:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:52,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876923314] [2020-10-23 18:16:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289770957] [2020-10-23 18:16:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:52,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:16:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:16:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:53,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:53,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-10-23 18:16:53,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734263387] [2020-10-23 18:16:53,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:16:53,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:16:53,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:16:53,009 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-10-23 18:16:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:53,335 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:16:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:16:53,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-23 18:16:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:53,337 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:16:53,337 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:16:53,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:16:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:16:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:16:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:16:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:16:53,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:16:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:53,346 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:16:53,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:16:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:16:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:16:53,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:53,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:53,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:53,564 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:16:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:53,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156871517] [2020-10-23 18:16:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:53,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156871517] [2020-10-23 18:16:53,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327686863] [2020-10-23 18:16:53,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:53,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:53,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:16:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:53,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:53,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:16:53,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515407975] [2020-10-23 18:16:53,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:16:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:16:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:16:53,932 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-10-23 18:16:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:54,302 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:16:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:54,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-23 18:16:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:54,305 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:16:54,305 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:16:54,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:16:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:16:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:16:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:16:54,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:16:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:54,314 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:16:54,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:16:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:16:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:16:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:54,316 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:54,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:54,529 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:16:54,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:54,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861011627] [2020-10-23 18:16:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:54,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861011627] [2020-10-23 18:16:54,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308167673] [2020-10-23 18:16:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:55,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:16:55,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:16:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:55,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:55,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2020-10-23 18:16:55,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370712976] [2020-10-23 18:16:55,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:16:55,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:16:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:16:55,053 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-10-23 18:16:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:55,975 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:16:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:55,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-23 18:16:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:55,978 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:16:55,978 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:16:55,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:16:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:16:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:16:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:16:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:16:55,987 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:16:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:55,987 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:16:55,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:16:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:16:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:16:55,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:55,989 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:56,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:16:56,193 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:56,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-10-23 18:16:56,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:56,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255142439] [2020-10-23 18:16:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:56,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255142439] [2020-10-23 18:16:56,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375299565] [2020-10-23 18:16:56,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:56,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:16:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:56,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:16:56,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:56,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:16:56,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 14 [2020-10-23 18:16:56,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586471490] [2020-10-23 18:16:56,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:16:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:56,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:16:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:16:56,679 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 11 states. [2020-10-23 18:16:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:56,833 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-23 18:16:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:16:56,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-10-23 18:16:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:56,835 INFO L225 Difference]: With dead ends: 35 [2020-10-23 18:16:56,835 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:16:56,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:16:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:16:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:16:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:16:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:16:56,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-10-23 18:16:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:56,837 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:16:56,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:16:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:16:56,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:16:57,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:57,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:16:57,144 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:16:57,145 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:16:57,145 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:16:57,145 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:16:57,145 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:57,146 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:16:57,146 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:57,146 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:57,146 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:16:57,146 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:16:57,146 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:57,146 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-10-23 18:16:57,146 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:16:57,146 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-10-23 18:16:57,147 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-10-23 18:16:57,147 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-10-23 18:16:57,148 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:16:57,148 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-23 18:16:57,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:16:57 BoogieIcfgContainer [2020-10-23 18:16:57,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:16:57,156 INFO L168 Benchmark]: Toolchain (without parser) took 7990.59 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.3 MB in the beginning and 121.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:57,156 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:16:57,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:57,158 INFO L168 Benchmark]: Boogie Preprocessor took 27.52 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:57,158 INFO L168 Benchmark]: RCFGBuilder took 517.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 102.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:57,159 INFO L168 Benchmark]: TraceAbstraction took 7203.93 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.3 MB in the beginning and 121.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:57,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.52 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 517.90 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 102.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7203.93 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 102.3 MB in the beginning and 121.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 48.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 168 SDslu, 272 SDs, 0 SdLazy, 638 SolverSat, 100 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 17 PreInvPairs, 17 NumberOfFragments, 47 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 124 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 447 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 434 ConstructedInterpolants, 0 QuantifiedInterpolants, 47020 SizeOfPredicates, 27 NumberOfNonLiveVariables, 827 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 396/588 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...