/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_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:19:11,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:19:11,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:19:11,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:19:11,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:19:11,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:19:11,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:19:11,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:19:11,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:19:11,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:19:11,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:19:11,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:19:11,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:19:11,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:19:11,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:19:11,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:19:11,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:19:11,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:19:11,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:19:11,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:19:11,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:19:11,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:19:11,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:19:11,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:19:11,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:19:11,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:19:11,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:19:11,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:19:11,638 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 22:19:11,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:19:11,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:19:11,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:19:11,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:19:11,700 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:19:11,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:19:11,701 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:19:11,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:19:11,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:19:11,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:19:11,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:19:11,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:19:11,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:19:11,704 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:19:11,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:19:11,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:19:11,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:19:11,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:19:11,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:19:11,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:19:11,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:19:11,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:11,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:19:11,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:19:11,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:19:11,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:19:11,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:19:11,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:19:11,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:19:11,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:19:12,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:19:12,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:19:12,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:19:12,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:19:12,162 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:19:12,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-11-06 22:19:12,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6141b9327/7f4369996f5f47e29543ad15d91b5cc4/FLAGe93242c61 [2020-11-06 22:19:12,919 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:19:12,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-11-06 22:19:12,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6141b9327/7f4369996f5f47e29543ad15d91b5cc4/FLAGe93242c61 [2020-11-06 22:19:13,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6141b9327/7f4369996f5f47e29543ad15d91b5cc4 [2020-11-06 22:19:13,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:19:13,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:19:13,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:13,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:19:13,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:19:13,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591051d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13, skipping insertion in model container [2020-11-06 22:19:13,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:19:13,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:19:13,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:13,628 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:19:13,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:13,670 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:19:13,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13 WrapperNode [2020-11-06 22:19:13,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:13,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:19:13,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:19:13,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:19:13,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (1/1) ... [2020-11-06 22:19:13,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:19:13,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:19:13,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:19:13,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:19:13,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (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 22:19:13,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:19:13,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:19:13,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:19:13,790 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:19:13,790 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-11-06 22:19:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:19:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:19:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:19:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:19:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:19:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:19:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:19:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-11-06 22:19:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:19:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:19:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:19:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:19:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:19:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:19:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:19:14,107 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:19:14,108 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:19:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:14 BoogieIcfgContainer [2020-11-06 22:19:14,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:19:14,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:19:14,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:19:14,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:19:14,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:19:13" (1/3) ... [2020-11-06 22:19:14,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011b953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:14, skipping insertion in model container [2020-11-06 22:19:14,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:13" (2/3) ... [2020-11-06 22:19:14,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011b953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:14, skipping insertion in model container [2020-11-06 22:19:14,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:14" (3/3) ... [2020-11-06 22:19:14,119 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-11-06 22:19:14,136 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:19:14,140 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:19:14,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:19:14,185 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:19:14,185 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:19:14,185 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:19:14,185 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:19:14,185 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:19:14,186 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:19:14,186 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:19:14,186 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:19:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-06 22:19:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:19:14,212 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:14,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:14,214 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:14,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1481297807, now seen corresponding path program 1 times [2020-11-06 22:19:14,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:14,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545564244] [2020-11-06 22:19:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:14,615 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 22:19:14,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545564244] [2020-11-06 22:19:14,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:14,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:14,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437737332] [2020-11-06 22:19:14,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:14,647 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-11-06 22:19:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:14,944 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-06 22:19:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:14,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:19:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:14,956 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:19:14,956 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:19:14,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:19:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:19:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:19:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-06 22:19:15,015 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-11-06 22:19:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:15,015 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-06 22:19:15,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-06 22:19:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:19:15,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:15,018 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] [2020-11-06 22:19:15,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:19:15,019 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash 262491562, now seen corresponding path program 1 times [2020-11-06 22:19:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:15,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270819758] [2020-11-06 22:19:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,212 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 22:19:15,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270819758] [2020-11-06 22:19:15,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:15,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:19:15,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003192196] [2020-11-06 22:19:15,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:19:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:19:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:19:15,217 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-11-06 22:19:15,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:15,563 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-06 22:19:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:19:15,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-06 22:19:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:15,565 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:19:15,565 INFO L226 Difference]: Without dead ends: 31 [2020-11-06 22:19:15,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-06 22:19:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-06 22:19:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:19:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-06 22:19:15,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-11-06 22:19:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:15,579 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-06 22:19:15,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:19:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-06 22:19:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:19:15,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:15,581 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] [2020-11-06 22:19:15,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:19:15,582 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1067256061, now seen corresponding path program 1 times [2020-11-06 22:19:15,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:15,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502561668] [2020-11-06 22:19:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,795 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 22:19:15,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502561668] [2020-11-06 22:19:15,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581211027] [2020-11-06 22:19:15,796 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 22:19:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:19:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:16,041 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 22:19:16,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:16,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-11-06 22:19:16,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937818650] [2020-11-06 22:19:16,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:19:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:19:16,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:19:16,047 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-11-06 22:19:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:16,494 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-06 22:19:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:16,495 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-06 22:19:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:16,497 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:19:16,497 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:19:16,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:19:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:19:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-11-06 22:19:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-06 22:19:16,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-11-06 22:19:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:16,510 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-06 22:19:16,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:19:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-06 22:19:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:19:16,511 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:16,512 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] [2020-11-06 22:19:16,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:19:16,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1416908450, now seen corresponding path program 1 times [2020-11-06 22:19:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:16,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215429520] [2020-11-06 22:19:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:16,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215429520] [2020-11-06 22:19:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023392486] [2020-11-06 22:19:17,033 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 22:19:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:19:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:19:17,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:17,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-11-06 22:19:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900181020] [2020-11-06 22:19:17,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:19:17,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:19:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:17,183 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2020-11-06 22:19:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:17,608 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-06 22:19:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:19:17,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-11-06 22:19:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:17,611 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:19:17,611 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:19:17,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:19:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:19:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-11-06 22:19:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:19:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-11-06 22:19:17,621 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2020-11-06 22:19:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:17,622 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-11-06 22:19:17,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:19:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-11-06 22:19:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:19:17,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:17,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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 22:19:17,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:17,839 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:17,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1482575991, now seen corresponding path program 2 times [2020-11-06 22:19:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:17,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863607268] [2020-11-06 22:19:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863607268] [2020-11-06 22:19:18,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726530834] [2020-11-06 22:19:18,068 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 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 22:19:18,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:18,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:19:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-06 22:19:18,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:18,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2020-11-06 22:19:18,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037728347] [2020-11-06 22:19:18,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:19:18,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:18,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:19:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:19:18,236 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2020-11-06 22:19:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:18,773 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-11-06 22:19:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:19:18,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-11-06 22:19:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:18,776 INFO L225 Difference]: With dead ends: 54 [2020-11-06 22:19:18,776 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:19:18,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:19:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:19:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-11-06 22:19:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:19:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-06 22:19:18,786 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 39 [2020-11-06 22:19:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:18,786 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-06 22:19:18,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:19:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-06 22:19:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:19:18,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:18,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:19,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:19,003 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash -487565550, now seen corresponding path program 2 times [2020-11-06 22:19:19,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:19,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501233783] [2020-11-06 22:19:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:19:19,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501233783] [2020-11-06 22:19:19,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189277999] [2020-11-06 22:19:19,447 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 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 22:19:19,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:19,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-06 22:19:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-06 22:19:19,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:19,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2020-11-06 22:19:19,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122648394] [2020-11-06 22:19:19,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:19:19,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:19,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:19:19,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:19,589 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-11-06 22:19:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:20,673 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-06 22:19:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:19:20,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-11-06 22:19:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:20,676 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:19:20,676 INFO L226 Difference]: Without dead ends: 55 [2020-11-06 22:19:20,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:19:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-06 22:19:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-11-06 22:19:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:19:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-11-06 22:19:20,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 45 [2020-11-06 22:19:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:20,688 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-11-06 22:19:20,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:19:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-11-06 22:19:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:19:20,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:20,690 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:20,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:20,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash 720493547, now seen corresponding path program 3 times [2020-11-06 22:19:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:20,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668935406] [2020-11-06 22:19:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:20,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:19:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668935406] [2020-11-06 22:19:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662055724] [2020-11-06 22:19:21,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:19:21,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:19:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:19:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:19:21,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:21,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 16 [2020-11-06 22:19:21,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72639020] [2020-11-06 22:19:21,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:19:21,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:21,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:19:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:21,486 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2020-11-06 22:19:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:21,689 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-11-06 22:19:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:19:21,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-11-06 22:19:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:21,692 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:19:21,692 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:19:21,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:19:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:19:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:19:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:19:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-06 22:19:21,701 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 51 [2020-11-06 22:19:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:21,702 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-06 22:19:21,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:19:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-06 22:19:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:19:21,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:21,704 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:21,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:19:21,918 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash -803455290, now seen corresponding path program 3 times [2020-11-06 22:19:21,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:21,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797906532] [2020-11-06 22:19:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:21,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-06 22:19:22,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797906532] [2020-11-06 22:19:22,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934928000] [2020-11-06 22:19:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:19:22,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:19:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:19:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-06 22:19:22,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:19:22,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 17 [2020-11-06 22:19:22,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883368415] [2020-11-06 22:19:22,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:19:22,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:22,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:19:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:19:22,479 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2020-11-06 22:19:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:22,712 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-11-06 22:19:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:19:22,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-11-06 22:19:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:22,719 INFO L225 Difference]: With dead ends: 41 [2020-11-06 22:19:22,719 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:19:22,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-06 22:19:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:19:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:19:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:19:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:19:22,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-11-06 22:19:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:22,722 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:19:22,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:19:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:19:22,722 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:19:22,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:22,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:19:23,103 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:19:23,104 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:19:23,104 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:19:23,104 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:19:23,105 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:23,106 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 22:19:23,107 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:23,107 INFO L262 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-11-06 22:19:23,107 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:19:23,107 INFO L266 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-11-06 22:19:23,107 INFO L266 CegarLoopResult]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2020-11-06 22:19:23,107 INFO L269 CegarLoopResult]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2020-11-06 22:19:23,107 INFO L266 CegarLoopResult]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2020-11-06 22:19:23,108 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:19:23,108 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:19:23,108 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:19:23,108 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:19:23,108 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 19 25) the Hoare annotation is: true [2020-11-06 22:19:23,108 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 19 25) no Hoare annotation was computed. [2020-11-06 22:19:23,108 INFO L262 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: false [2020-11-06 22:19:23,108 INFO L266 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-11-06 22:19:23,108 INFO L266 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-11-06 22:19:23,109 INFO L262 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-11-06 22:19:23,109 INFO L266 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-11-06 22:19:23,109 INFO L266 CegarLoopResult]: For program point L22-2(lines 19 25) no Hoare annotation was computed. [2020-11-06 22:19:23,112 INFO L266 CegarLoopResult]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2020-11-06 22:19:23,112 INFO L262 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-06 22:19:23,112 INFO L266 CegarLoopResult]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2020-11-06 22:19:23,112 INFO L266 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-11-06 22:19:23,112 INFO L266 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-11-06 22:19:23,113 INFO L269 CegarLoopResult]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2020-11-06 22:19:23,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:19:23 BoogieIcfgContainer [2020-11-06 22:19:23,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:19:23,124 INFO L168 Benchmark]: Toolchain (without parser) took 9837.73 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 136.3 MB in the beginning and 110.9 MB in the end (delta: 25.4 MB). Peak memory consumption was 97.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:23,125 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 94.4 MB in the beginning and 94.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:19:23,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.96 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 126.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:23,126 INFO L168 Benchmark]: Boogie Preprocessor took 34.00 ms. Allocated memory is still 160.4 MB. Free memory was 126.5 MB in the beginning and 125.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:23,127 INFO L168 Benchmark]: RCFGBuilder took 399.51 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 143.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:23,128 INFO L168 Benchmark]: TraceAbstraction took 9009.59 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 143.2 MB in the beginning and 110.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 102.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:23,131 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory was 94.4 MB in the beginning and 94.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.96 ms. Allocated memory is still 160.4 MB. Free memory was 135.6 MB in the beginning and 126.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.00 ms. Allocated memory is still 160.4 MB. Free memory was 126.5 MB in the beginning and 125.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 399.51 ms. Allocated memory is still 160.4 MB. Free memory was 125.0 MB in the beginning and 143.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9009.59 ms. Allocated memory was 160.4 MB in the beginning and 231.7 MB in the end (delta: 71.3 MB). Free memory was 143.2 MB in the beginning and 110.9 MB in the end (delta: 32.2 MB). Peak memory consumption was 102.9 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 202 SDslu, 643 SDs, 0 SdLazy, 1213 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 457 GetRequests, 311 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 20 NumberOfFragments, 51 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 188 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 540 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 526 ConstructedInterpolants, 0 QuantifiedInterpolants, 63652 SizeOfPredicates, 33 NumberOfNonLiveVariables, 960 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...