/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/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:19:05,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:19:05,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:19:05,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:19:05,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:19:05,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:19:05,659 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:19:05,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:19:05,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:19:05,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:19:05,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:19:05,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:19:05,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:19:05,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:19:05,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:19:05,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:19:05,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:19:05,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:19:05,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:19:05,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:19:05,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:19:05,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:19:05,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:19:05,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:19:05,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:19:05,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:19:05,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:19:05,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:19:05,744 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 [2020-11-06 22:19:05,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:19:05,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:19:05,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:19:05,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:19:05,798 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:19:05,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:19:05,798 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:19:05,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:19:05,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:19:05,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:19:05,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:19:05,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:19:05,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:19:05,800 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:19:05,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:19:05,800 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:19:05,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:19:05,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:19:05,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:19:05,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:19:05,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:19:05,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:05,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:19:05,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:19:05,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:19:05,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:19:05,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:19:05,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:19:05,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:19:05,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:19:06,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:19:06,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:19:06,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:19:06,238 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:19:06,239 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:19:06,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-11-06 22:19:06,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/211881280/081c0b63076a48bcaf7d7c1a8b4faa63/FLAG60525ddc5 [2020-11-06 22:19:06,992 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:19:06,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-11-06 22:19:06,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/211881280/081c0b63076a48bcaf7d7c1a8b4faa63/FLAG60525ddc5 [2020-11-06 22:19:07,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/211881280/081c0b63076a48bcaf7d7c1a8b4faa63 [2020-11-06 22:19:07,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:19:07,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:19:07,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:07,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:19:07,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:19:07,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd600c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07, skipping insertion in model container [2020-11-06 22:19:07,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:19:07,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:19:07,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:07,551 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:19:07,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:07,589 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:19:07,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07 WrapperNode [2020-11-06 22:19:07,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:07,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:19:07,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:19:07,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:19:07,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (1/1) ... [2020-11-06 22:19:07,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:19:07,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:19:07,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:19:07,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:19:07,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (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 [2020-11-06 22:19:07,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:19:07,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:19:07,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:19:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:19:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-06 22:19:07,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:19:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:19:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:19:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:19:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:19:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:19:07,717 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:19:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-06 22:19:07,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:19:07,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:19:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:19:07,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:19:07,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:19:08,096 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:19:08,096 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:19:08,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:08 BoogieIcfgContainer [2020-11-06 22:19:08,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:19:08,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:19:08,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:19:08,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:19:08,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:19:07" (1/3) ... [2020-11-06 22:19:08,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b4c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:08, skipping insertion in model container [2020-11-06 22:19:08,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:07" (2/3) ... [2020-11-06 22:19:08,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b4c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:08, skipping insertion in model container [2020-11-06 22:19:08,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:08" (3/3) ... [2020-11-06 22:19:08,109 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-11-06 22:19:08,128 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:19:08,132 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:19:08,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:19:08,219 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:19:08,219 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:19:08,219 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:19:08,220 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:19:08,220 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:19:08,220 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:19:08,220 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:19:08,220 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:19:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-06 22:19:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:19:08,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:08,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:08,254 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:08,269 INFO L82 PathProgramCache]: Analyzing trace with hash 791772439, now seen corresponding path program 1 times [2020-11-06 22:19:08,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:08,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412383498] [2020-11-06 22:19:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:08,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412383498] [2020-11-06 22:19:08,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:08,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:08,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26819460] [2020-11-06 22:19:08,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:08,727 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 6 states. [2020-11-06 22:19:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:09,050 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-11-06 22:19:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:09,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:19:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:09,062 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:19:09,062 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:19:09,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:19:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-06 22:19:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-06 22:19:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-06 22:19:09,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-11-06 22:19:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:09,119 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-06 22:19:09,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-06 22:19:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:09,121 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:09,121 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] [2020-11-06 22:19:09,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:19:09,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2001775916, now seen corresponding path program 1 times [2020-11-06 22:19:09,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:09,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70122318] [2020-11-06 22:19:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:09,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70122318] [2020-11-06 22:19:09,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:09,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:09,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195837195] [2020-11-06 22:19:09,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:09,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:09,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:09,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:09,370 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-11-06 22:19:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:09,767 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-11-06 22:19:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:09,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-06 22:19:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:09,770 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:19:09,770 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:19:09,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:19:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:19:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:19:09,785 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-11-06 22:19:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:09,785 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:19:09,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:19:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:09,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:09,787 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] [2020-11-06 22:19:09,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:19:09,788 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:09,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1405687699, now seen corresponding path program 1 times [2020-11-06 22:19:09,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:09,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701540906] [2020-11-06 22:19:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:10,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701540906] [2020-11-06 22:19:10,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:10,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:10,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250375564] [2020-11-06 22:19:10,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:10,054 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2020-11-06 22:19:10,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:10,429 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-11-06 22:19:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:10,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-11-06 22:19:10,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:10,431 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:19:10,432 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:19:10,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:19:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:19:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-06 22:19:10,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-11-06 22:19:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:10,442 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-06 22:19:10,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-06 22:19:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:10,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:10,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:10,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:19:10,444 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 20115896, now seen corresponding path program 1 times [2020-11-06 22:19:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:10,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912784030] [2020-11-06 22:19:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:10,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912784030] [2020-11-06 22:19:10,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:10,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:10,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890544886] [2020-11-06 22:19:10,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:10,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:10,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:10,656 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-11-06 22:19:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:10,905 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-11-06 22:19:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:10,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-06 22:19:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:10,907 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:19:10,907 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:19:10,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:19:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-06 22:19:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:19:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:19:10,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:19:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:10,918 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:19:10,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:19:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:10,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:10,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:10,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:19:10,920 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1776835463, now seen corresponding path program 1 times [2020-11-06 22:19:10,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:10,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741016300] [2020-11-06 22:19:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:10,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741016300] [2020-11-06 22:19:11,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:11,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:11,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385526602] [2020-11-06 22:19:11,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:11,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:11,121 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-11-06 22:19:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:11,551 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-11-06 22:19:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:11,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-11-06 22:19:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:11,553 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:19:11,553 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:19:11,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:19:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-11-06 22:19:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:19:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:19:11,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 29 [2020-11-06 22:19:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:11,563 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:19:11,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:19:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:11,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:11,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:11,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:19:11,565 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -889331782, now seen corresponding path program 1 times [2020-11-06 22:19:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564919828] [2020-11-06 22:19:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:11,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564919828] [2020-11-06 22:19:11,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898996443] [2020-11-06 22:19:11,802 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 [2020-11-06 22:19:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:19:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:12,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:12,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:19:12,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484192267] [2020-11-06 22:19:12,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:19:12,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:19:12,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:12,032 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-11-06 22:19:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:12,814 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-06 22:19:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:19:12,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-06 22:19:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:12,816 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:19:12,816 INFO L226 Difference]: Without dead ends: 42 [2020-11-06 22:19:12,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:19:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-06 22:19:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-06 22:19:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:19:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-11-06 22:19:12,839 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2020-11-06 22:19:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:12,839 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-11-06 22:19:12,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:19:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-11-06 22:19:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:12,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:12,842 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] [2020-11-06 22:19:13,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:19:13,045 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash -6218534, now seen corresponding path program 1 times [2020-11-06 22:19:13,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:13,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871454343] [2020-11-06 22:19:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:13,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871454343] [2020-11-06 22:19:13,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:13,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-06 22:19:13,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371253601] [2020-11-06 22:19:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:13,332 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-11-06 22:19:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:13,837 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-11-06 22:19:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:13,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-11-06 22:19:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:13,840 INFO L225 Difference]: With dead ends: 59 [2020-11-06 22:19:13,840 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:13,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:13,849 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-11-06 22:19:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:13,849 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:13,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:13,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:13,851 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] [2020-11-06 22:19:13,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:19:13,851 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1803169893, now seen corresponding path program 1 times [2020-11-06 22:19:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:13,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280032156] [2020-11-06 22:19:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:13,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:14,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280032156] [2020-11-06 22:19:14,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505140536] [2020-11-06 22:19:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:19:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:19:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-06 22:19:14,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:14,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2020-11-06 22:19:14,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818250008] [2020-11-06 22:19:14,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:19:14,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:19:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:14,312 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2020-11-06 22:19:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:14,325 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-06 22:19:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:14,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-11-06 22:19:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:14,327 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:19:14,327 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:14,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:14,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:14,337 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-11-06 22:19:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:14,338 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:14,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:19:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:19:14,339 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:14,339 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:19:14,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:14,554 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:14,555 INFO L82 PathProgramCache]: Analyzing trace with hash -915666212, now seen corresponding path program 1 times [2020-11-06 22:19:14,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:14,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311236269] [2020-11-06 22:19:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:14,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311236269] [2020-11-06 22:19:14,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752134695] [2020-11-06 22:19:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:19:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-06 22:19:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:15,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:15,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-11-06 22:19:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192301192] [2020-11-06 22:19:15,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:19:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:19:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:15,088 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 16 states. [2020-11-06 22:19:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:16,022 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-11-06 22:19:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:19:16,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-11-06 22:19:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:16,023 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:19:16,023 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:19:16,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:19:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:19:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-06 22:19:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:19:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:19:16,031 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-11-06 22:19:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:16,032 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:19:16,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:19:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:19:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:19:16,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:16,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-11-06 22:19:16,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:16,238 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash -30908644, now seen corresponding path program 1 times [2020-11-06 22:19:16,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:16,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478627238] [2020-11-06 22:19:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:16,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478627238] [2020-11-06 22:19:16,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033006635] [2020-11-06 22:19:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:19:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:19:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-06 22:19:16,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:16,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2020-11-06 22:19:16,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141698996] [2020-11-06 22:19:16,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:19:16,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:16,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:19:16,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:16,670 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-11-06 22:19:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:16,697 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-11-06 22:19:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:16,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-11-06 22:19:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:16,698 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:19:16,699 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:19:16,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:19:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-11-06 22:19:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:19:16,706 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 43 [2020-11-06 22:19:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:16,707 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:19:16,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:19:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:19:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:19:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:16,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:16,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:16,923 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1827860003, now seen corresponding path program 2 times [2020-11-06 22:19:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:16,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924923693] [2020-11-06 22:19:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924923693] [2020-11-06 22:19:17,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279531796] [2020-11-06 22:19:17,381 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 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 [2020-11-06 22:19:17,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:17,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:17,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:19:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:17,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:17,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-11-06 22:19:17,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488911693] [2020-11-06 22:19:17,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:19:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:19:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:19:17,546 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2020-11-06 22:19:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:18,754 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-11-06 22:19:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 22:19:18,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-11-06 22:19:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:18,756 INFO L225 Difference]: With dead ends: 83 [2020-11-06 22:19:18,756 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:19:18,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2020-11-06 22:19:18,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:19:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-11-06 22:19:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:19:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-06 22:19:18,781 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2020-11-06 22:19:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:18,782 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-06 22:19:18,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:19:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-06 22:19:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-06 22:19:18,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:18,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:18,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 22:19:19,000 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:19,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2448331, now seen corresponding path program 2 times [2020-11-06 22:19:19,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:19,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500230189] [2020-11-06 22:19:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:19:19,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500230189] [2020-11-06 22:19:19,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732135177] [2020-11-06 22:19:19,535 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 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 [2020-11-06 22:19:19,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 22:19:19,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:19:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-06 22:19:19,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:19,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [21] total 24 [2020-11-06 22:19:19,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066014140] [2020-11-06 22:19:19,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:19:19,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:19:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:19:19,723 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 5 states. [2020-11-06 22:19:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:19,735 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-11-06 22:19:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:19:19,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-11-06 22:19:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:19,736 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:19:19,736 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:19:19,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:19:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:19:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:19:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:19:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:19:19,739 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-11-06 22:19:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:19,739 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:19:19,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:19:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:19:19,739 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:19:19,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:19,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:19:20,024 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:19:20,024 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:19:20,024 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:19:20,024 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L262 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|)) [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2020-11-06 22:19:20,025 INFO L269 CegarLoopResult]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2020-11-06 22:19:20,025 INFO L266 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-11-06 22:19:20,026 INFO L266 CegarLoopResult]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2020-11-06 22:19:20,026 INFO L269 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-11-06 22:19:20,026 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:20,026 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:19:20,026 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:19:20,026 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:20,026 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 23 29) the Hoare annotation is: true [2020-11-06 22:19:20,026 INFO L262 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: false [2020-11-06 22:19:20,026 INFO L266 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L269 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L269 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2020-11-06 22:19:20,027 INFO L266 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-06 22:19:20,028 INFO L266 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-06 22:19:20,028 INFO L269 CegarLoopResult]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2020-11-06 22:19:20,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:19:20 BoogieIcfgContainer [2020-11-06 22:19:20,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:19:20,035 INFO L168 Benchmark]: Toolchain (without parser) took 12683.10 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 125.9 MB in the beginning and 160.1 MB in the end (delta: -34.3 MB). Peak memory consumption was 79.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:20,036 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:19:20,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.78 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:20,037 INFO L168 Benchmark]: Boogie Preprocessor took 35.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:20,038 INFO L168 Benchmark]: RCFGBuilder took 471.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 100.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:20,039 INFO L168 Benchmark]: TraceAbstraction took 11932.03 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 100.4 MB in the beginning and 160.1 MB in the end (delta: -59.7 MB). Peak memory consumption was 53.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:20,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.78 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 471.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 100.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11932.03 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 100.4 MB in the beginning and 160.1 MB in the end (delta: -59.7 MB). Peak memory consumption was 53.0 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 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.7s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 220 SDslu, 890 SDs, 0 SdLazy, 2016 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 534 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 24 NumberOfFragments, 41 HoareAnnotationTreeSize, 24 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 180 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 627 NumberOfCodeBlocks, 599 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 75593 SizeOfPredicates, 17 NumberOfNonLiveVariables, 831 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 163/231 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...