/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:20:04,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:20:04,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:20:04,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:20:04,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:20:04,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:20:04,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:20:04,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:20:04,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:20:04,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:20:04,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:20:04,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:20:04,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:20:04,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:20:04,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:20:04,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:20:04,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:20:04,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:20:04,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:20:04,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:20:04,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:20:04,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:20:04,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:20:04,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:20:04,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:20:04,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:20:04,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:20:04,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:20:04,228 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 22:20:04,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:20:04,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:20:04,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:20:04,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:20:04,277 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:20:04,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:20:04,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:20:04,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:20:04,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:20:04,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:20:04,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:20:04,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:20:04,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:20:04,280 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:20:04,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:20:04,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:20:04,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:20:04,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:20:04,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:20:04,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:20:04,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:20:04,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:20:04,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:20:04,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:20:04,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:20:04,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:20:04,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:20:04,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:20:04,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:20:04,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:20:04,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:20:04,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:20:04,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:20:04,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:20:04,719 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:20:04,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-11-06 22:20:04,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e58c7d0d/ef7a640e457242bb87dfc69c780f31db/FLAG80ec98c9d [2020-11-06 22:20:05,461 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:20:05,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-11-06 22:20:05,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e58c7d0d/ef7a640e457242bb87dfc69c780f31db/FLAG80ec98c9d [2020-11-06 22:20:05,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e58c7d0d/ef7a640e457242bb87dfc69c780f31db [2020-11-06 22:20:05,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:20:05,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:20:05,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:20:05,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:20:05,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:20:05,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:05" (1/1) ... [2020-11-06 22:20:05,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113598a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:05, skipping insertion in model container [2020-11-06 22:20:05,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:05" (1/1) ... [2020-11-06 22:20:05,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:20:05,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:20:06,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:20:06,108 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:20:06,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:20:06,143 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:20:06,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06 WrapperNode [2020-11-06 22:20:06,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:20:06,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:20:06,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:20:06,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:20:06,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:20:06,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:20:06,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:20:06,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:20:06,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:20:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:20:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:20:06,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:20:06,273 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:20:06,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:20:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:20:06,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:20:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:20:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:20:06,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:20:06,275 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:20:06,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:20:06,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:20:06,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:20:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:20:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:20:06,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:20:06,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:20:06,618 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:20:06,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:06 BoogieIcfgContainer [2020-11-06 22:20:06,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:20:06,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:20:06,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:20:06,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:20:06,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:20:05" (1/3) ... [2020-11-06 22:20:06,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b51830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:06, skipping insertion in model container [2020-11-06 22:20:06,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (2/3) ... [2020-11-06 22:20:06,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b51830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:06, skipping insertion in model container [2020-11-06 22:20:06,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:06" (3/3) ... [2020-11-06 22:20:06,629 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-11-06 22:20:06,645 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:20:06,649 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:20:06,662 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:20:06,690 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:20:06,690 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:20:06,691 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:20:06,691 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:20:06,691 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:20:06,691 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:20:06,691 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:20:06,691 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:20:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:20:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:20:06,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:06,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:06,716 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-11-06 22:20:06,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:06,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934728461] [2020-11-06 22:20:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,223 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 22:20:07,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934728461] [2020-11-06 22:20:07,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:20:07,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:20:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348434681] [2020-11-06 22:20:07,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:20:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:20:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:20:07,251 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-06 22:20:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:07,628 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-06 22:20:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:20:07,630 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:20:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:07,640 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:20:07,641 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:20:07,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:20:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:20:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:20:07,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:20:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:20:07,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:20:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:20:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:20:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:20:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:20:07,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:07,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:07,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:20:07,701 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-11-06 22:20:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:07,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776663684] [2020-11-06 22:20:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,906 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 22:20:07,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776663684] [2020-11-06 22:20:07,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436825578] [2020-11-06 22:20:07,908 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 22:20:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:20:08,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:08,145 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 22:20:08,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:08,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-06 22:20:08,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565047235] [2020-11-06 22:20:08,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:20:08,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:20:08,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:20:08,150 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-11-06 22:20:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:08,584 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-06 22:20:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:20:08,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-06 22:20:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:08,587 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:20:08,587 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:20:08,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:20:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:20:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:20:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:20:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:20:08,598 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-11-06 22:20:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:08,599 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:20:08,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:20:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:20:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:20:08,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:08,600 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:08,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:20:08,815 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-11-06 22:20:08,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:08,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792739369] [2020-11-06 22:20:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:20:09,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792739369] [2020-11-06 22:20:09,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703260271] [2020-11-06 22:20:09,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:09,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:20:09,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:20:09,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:09,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-11-06 22:20:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726617976] [2020-11-06 22:20:09,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:20:09,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:20:09,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:20:09,402 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2020-11-06 22:20:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:09,960 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-06 22:20:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:20:09,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-11-06 22:20:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:09,962 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:20:09,962 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:20:09,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:20:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:20:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:20:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:20:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:20:09,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-06 22:20:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:09,972 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:20:09,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:20:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:20:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:20:09,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:09,974 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:10,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:10,190 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-11-06 22:20:10,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:10,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302745553] [2020-11-06 22:20:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:20:10,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302745553] [2020-11-06 22:20:10,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10369404] [2020-11-06 22:20:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:10,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:20:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:20:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:20:10,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:10,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-11-06 22:20:10,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623973095] [2020-11-06 22:20:10,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:20:10,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:20:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:20:10,599 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2020-11-06 22:20:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:11,175 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-06 22:20:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:20:11,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-11-06 22:20:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:11,177 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:20:11,177 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:20:11,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:20:11,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:20:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-06 22:20:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:20:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-06 22:20:11,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-11-06 22:20:11,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:11,196 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-06 22:20:11,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:20:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-06 22:20:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:20:11,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:11,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:11,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:11,415 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:11,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-11-06 22:20:11,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:11,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5277846] [2020-11-06 22:20:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:20:11,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5277846] [2020-11-06 22:20:11,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520002496] [2020-11-06 22:20:11,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:11,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:11,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:20:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:20:11,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:11,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-11-06 22:20:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688842924] [2020-11-06 22:20:11,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:20:11,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:20:11,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:20:11,875 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-11-06 22:20:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:12,246 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-06 22:20:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:20:12,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-06 22:20:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:12,248 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:20:12,248 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:20:12,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:20:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:20:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:20:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:20:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-06 22:20:12,257 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-06 22:20:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:12,257 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-06 22:20:12,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:20:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-06 22:20:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:20:12,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:12,259 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:12,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:12,475 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-11-06 22:20:12,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:12,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614585477] [2020-11-06 22:20:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:20:12,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614585477] [2020-11-06 22:20:12,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639553268] [2020-11-06 22:20:12,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:12,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-06 22:20:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:20:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:20:12,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:12,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2020-11-06 22:20:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379312986] [2020-11-06 22:20:12,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-06 22:20:13,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:13,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-06 22:20:13,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:20:13,001 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2020-11-06 22:20:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:13,898 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-06 22:20:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:20:13,898 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-11-06 22:20:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:13,901 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:20:13,901 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:20:13,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2020-11-06 22:20:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:20:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:20:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:20:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-06 22:20:13,910 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-11-06 22:20:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:13,910 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-06 22:20:13,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-06 22:20:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-06 22:20:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:20:13,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:13,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:14,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:20:14,115 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:14,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-11-06 22:20:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:14,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604190296] [2020-11-06 22:20:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:20:14,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604190296] [2020-11-06 22:20:14,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675302797] [2020-11-06 22:20:14,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:14,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:20:14,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:20:14,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:20:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2020-11-06 22:20:14,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609059953] [2020-11-06 22:20:14,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:20:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:20:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:20:14,606 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-11-06 22:20:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:15,100 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-06 22:20:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:20:15,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-06 22:20:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:15,103 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:20:15,103 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:20:15,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:20:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:20:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:20:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:20:15,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:20:15,112 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-11-06 22:20:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:15,113 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:20:15,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:20:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:20:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:20:15,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:15,114 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:15,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:15,318 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-11-06 22:20:15,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:15,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681783702] [2020-11-06 22:20:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:20:15,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681783702] [2020-11-06 22:20:15,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727036299] [2020-11-06 22:20:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:20:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:20:15,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2020-11-06 22:20:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105428039] [2020-11-06 22:20:15,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:20:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:20:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:20:15,792 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-11-06 22:20:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:16,357 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-06 22:20:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:20:16,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-11-06 22:20:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:16,359 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:20:16,361 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:20:16,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-11-06 22:20:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:20:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:20:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:20:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-06 22:20:16,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-11-06 22:20:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:16,378 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-06 22:20:16,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:20:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-06 22:20:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 22:20:16,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:16,382 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:16,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:16,584 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-11-06 22:20:16,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:16,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732963386] [2020-11-06 22:20:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:20:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732963386] [2020-11-06 22:20:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702777002] [2020-11-06 22:20:16,880 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:16,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:16,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:20:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:20:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-11-06 22:20:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068008843] [2020-11-06 22:20:17,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:20:17,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:17,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:20:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:20:17,037 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-11-06 22:20:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:17,624 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-06 22:20:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:20:17,625 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-11-06 22:20:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:17,626 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:20:17,626 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:20:17,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:20:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:20:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-06 22:20:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:20:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-06 22:20:17,635 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-11-06 22:20:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:17,636 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-06 22:20:17,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:20:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-06 22:20:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:20:17,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:17,637 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:17,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:20:17,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-11-06 22:20:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:17,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638629943] [2020-11-06 22:20:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:20:18,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638629943] [2020-11-06 22:20:18,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756251169] [2020-11-06 22:20:18,200 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:18,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-06 22:20:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-06 22:20:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:20:18,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:18,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 36 [2020-11-06 22:20:18,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447340774] [2020-11-06 22:20:18,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-06 22:20:18,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-06 22:20:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2020-11-06 22:20:18,891 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 36 states. [2020-11-06 22:20:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:20,349 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-06 22:20:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:20:20,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2020-11-06 22:20:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:20,353 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:20:20,354 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:20:20,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:20:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:20:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-06 22:20:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:20:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-06 22:20:20,371 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-11-06 22:20:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:20,372 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-06 22:20:20,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-06 22:20:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-06 22:20:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-06 22:20:20,376 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:20,376 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:20,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:20,578 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-11-06 22:20:20,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:20,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060474818] [2020-11-06 22:20:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-06 22:20:21,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060474818] [2020-11-06 22:20:21,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115284528] [2020-11-06 22:20:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:21,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:20:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-06 22:20:21,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:21,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2020-11-06 22:20:21,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55898925] [2020-11-06 22:20:21,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:20:21,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:21,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:20:21,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:20:21,233 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-11-06 22:20:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:21,914 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-06 22:20:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:20:21,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-11-06 22:20:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:21,917 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:20:21,917 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:20:21,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:20:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:20:21,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-06 22:20:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:20:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-06 22:20:21,933 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-11-06 22:20:21,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:21,934 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-06 22:20:21,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:20:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-06 22:20:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:20:21,940 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:21,940 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:22,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:22,156 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-11-06 22:20:22,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:22,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663490491] [2020-11-06 22:20:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-06 22:20:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663490491] [2020-11-06 22:20:22,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513390441] [2020-11-06 22:20:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:22,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-06 22:20:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:22,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-06 22:20:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-06 22:20:22,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:22,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 19 [2020-11-06 22:20:22,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475434480] [2020-11-06 22:20:22,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:20:22,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:20:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:20:22,891 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-11-06 22:20:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:23,661 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-06 22:20:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:20:23,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-11-06 22:20:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:23,663 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:20:23,663 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:20:23,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:20:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:20:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-06 22:20:23,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:20:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-06 22:20:23,677 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-11-06 22:20:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:23,678 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-06 22:20:23,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:20:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-06 22:20:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-06 22:20:23,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:23,682 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:23,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-06 22:20:23,897 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:23,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:23,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-11-06 22:20:23,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:23,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796606657] [2020-11-06 22:20:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-06 22:20:24,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796606657] [2020-11-06 22:20:24,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521540870] [2020-11-06 22:20:24,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:24,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-06 22:20:24,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-06 22:20:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-11-06 22:20:25,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:25,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 45 [2020-11-06 22:20:25,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879306537] [2020-11-06 22:20:25,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-06 22:20:25,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:25,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-06 22:20:25,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:20:25,374 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 45 states. [2020-11-06 22:20:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:27,509 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-06 22:20:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-06 22:20:27,510 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2020-11-06 22:20:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:27,511 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:20:27,512 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:20:27,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=924, Invalid=4188, Unknown=0, NotChecked=0, Total=5112 [2020-11-06 22:20:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:20:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-06 22:20:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:20:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-11-06 22:20:27,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-11-06 22:20:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:27,521 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-11-06 22:20:27,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-06 22:20:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-11-06 22:20:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-06 22:20:27,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:27,523 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:27,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:20:27,738 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:27,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-11-06 22:20:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:27,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585712811] [2020-11-06 22:20:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:27,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-06 22:20:28,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585712811] [2020-11-06 22:20:28,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599078864] [2020-11-06 22:20:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-06 22:20:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-11-06 22:20:28,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:28,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2020-11-06 22:20:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720930402] [2020-11-06 22:20:28,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:20:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:20:28,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:20:28,535 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-11-06 22:20:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:29,428 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-06 22:20:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:20:29,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-11-06 22:20:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:29,430 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:20:29,430 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:20:29,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2020-11-06 22:20:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:20:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-06 22:20:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:20:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-06 22:20:29,439 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-11-06 22:20:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:29,439 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-06 22:20:29,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:20:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-06 22:20:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-06 22:20:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:29,441 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:29,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 22:20:29,655 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-11-06 22:20:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:29,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490685822] [2020-11-06 22:20:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:29,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-06 22:20:30,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490685822] [2020-11-06 22:20:30,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622878251] [2020-11-06 22:20:30,389 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:30,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:30,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-06 22:20:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-11-06 22:20:30,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:30,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2020-11-06 22:20:30,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748643233] [2020-11-06 22:20:30,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-06 22:20:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-06 22:20:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:20:30,579 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-11-06 22:20:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:31,516 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-06 22:20:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:20:31,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-11-06 22:20:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:31,517 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:20:31,518 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:20:31,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:20:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:20:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-06 22:20:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-06 22:20:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-11-06 22:20:31,528 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-11-06 22:20:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:31,529 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-11-06 22:20:31,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-06 22:20:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-11-06 22:20:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-06 22:20:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:31,530 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:31,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:31,748 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-11-06 22:20:31,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:31,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797904687] [2020-11-06 22:20:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-06 22:20:32,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797904687] [2020-11-06 22:20:32,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324204526] [2020-11-06 22:20:32,415 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:32,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-06 22:20:32,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:32,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-06 22:20:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-11-06 22:20:32,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:32,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 23 [2020-11-06 22:20:32,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117504822] [2020-11-06 22:20:32,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:20:32,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:20:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:20:32,642 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2020-11-06 22:20:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:33,711 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-06 22:20:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:20:33,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-11-06 22:20:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:33,713 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:20:33,713 INFO L226 Difference]: Without dead ends: 65 [2020-11-06 22:20:33,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:20:33,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-06 22:20:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-06 22:20:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-06 22:20:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-11-06 22:20:33,726 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-11-06 22:20:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:33,726 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-11-06 22:20:33,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:20:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-11-06 22:20:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-06 22:20:33,728 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:33,728 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:33,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-06 22:20:33,945 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-11-06 22:20:33,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:33,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307830226] [2020-11-06 22:20:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-06 22:20:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307830226] [2020-11-06 22:20:34,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534697761] [2020-11-06 22:20:34,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:34,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-06 22:20:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-11-06 22:20:34,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:34,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2020-11-06 22:20:34,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624011173] [2020-11-06 22:20:34,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-06 22:20:34,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-06 22:20:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:20:34,907 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2020-11-06 22:20:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:35,957 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-06 22:20:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-06 22:20:35,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-11-06 22:20:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:35,960 INFO L225 Difference]: With dead ends: 73 [2020-11-06 22:20:35,960 INFO L226 Difference]: Without dead ends: 68 [2020-11-06 22:20:35,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=600, Invalid=1206, Unknown=0, NotChecked=0, Total=1806 [2020-11-06 22:20:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-06 22:20:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-06 22:20:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-06 22:20:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-11-06 22:20:35,968 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-11-06 22:20:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:35,968 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-11-06 22:20:35,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-06 22:20:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-11-06 22:20:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-06 22:20:35,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:35,969 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:36,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-06 22:20:36,183 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:36,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1831747727, now seen corresponding path program 17 times [2020-11-06 22:20:36,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:36,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664998289] [2020-11-06 22:20:36,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-06 22:20:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664998289] [2020-11-06 22:20:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782002534] [2020-11-06 22:20:37,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:37,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-06 22:20:37,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-06 22:20:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-11-06 22:20:38,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:38,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 60 [2020-11-06 22:20:38,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485986369] [2020-11-06 22:20:38,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-11-06 22:20:38,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:38,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-11-06 22:20:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2020-11-06 22:20:38,677 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 60 states. [2020-11-06 22:20:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:41,867 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-06 22:20:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-06 22:20:41,868 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2020-11-06 22:20:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:41,869 INFO L225 Difference]: With dead ends: 76 [2020-11-06 22:20:41,869 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:20:41,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1679, Invalid=7633, Unknown=0, NotChecked=0, Total=9312 [2020-11-06 22:20:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:20:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-06 22:20:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:20:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-11-06 22:20:41,878 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-11-06 22:20:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:41,878 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-11-06 22:20:41,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-11-06 22:20:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-11-06 22:20:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 22:20:41,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:41,880 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:42,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-06 22:20:42,095 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:42,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1286539077, now seen corresponding path program 18 times [2020-11-06 22:20:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:42,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31401788] [2020-11-06 22:20:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:42,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-06 22:20:43,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31401788] [2020-11-06 22:20:43,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901695134] [2020-11-06 22:20:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:43,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-06 22:20:43,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-06 22:20:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-11-06 22:20:44,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:44,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41] total 63 [2020-11-06 22:20:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210859811] [2020-11-06 22:20:44,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-06 22:20:44,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-06 22:20:44,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2020-11-06 22:20:44,853 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 63 states. [2020-11-06 22:20:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:48,487 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-11-06 22:20:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-06 22:20:48,488 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2020-11-06 22:20:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:48,490 INFO L225 Difference]: With dead ends: 79 [2020-11-06 22:20:48,490 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:20:48,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1857, Invalid=8445, Unknown=0, NotChecked=0, Total=10302 [2020-11-06 22:20:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:20:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-06 22:20:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:20:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-11-06 22:20:48,499 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-11-06 22:20:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:48,499 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-11-06 22:20:48,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-06 22:20:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-11-06 22:20:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-06 22:20:48,500 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:48,501 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:48,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:48,714 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash 626937743, now seen corresponding path program 19 times [2020-11-06 22:20:48,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:48,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015987887] [2020-11-06 22:20:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:48,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-06 22:20:49,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015987887] [2020-11-06 22:20:49,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281213838] [2020-11-06 22:20:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-06 22:20:49,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-11-06 22:20:49,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:49,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 27 [2020-11-06 22:20:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310081346] [2020-11-06 22:20:49,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 22:20:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 22:20:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:20:49,975 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 27 states. [2020-11-06 22:20:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:51,270 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-11-06 22:20:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:20:51,271 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2020-11-06 22:20:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:51,273 INFO L225 Difference]: With dead ends: 82 [2020-11-06 22:20:51,273 INFO L226 Difference]: Without dead ends: 77 [2020-11-06 22:20:51,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=792, Invalid=1560, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:20:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-06 22:20:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-06 22:20:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-06 22:20:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-11-06 22:20:51,281 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-11-06 22:20:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:51,281 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-11-06 22:20:51,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 22:20:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-11-06 22:20:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-06 22:20:51,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:51,283 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:51,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:51,498 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1436396997, now seen corresponding path program 20 times [2020-11-06 22:20:51,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:51,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396236553] [2020-11-06 22:20:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:51,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-06 22:20:52,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396236553] [2020-11-06 22:20:52,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302787764] [2020-11-06 22:20:52,554 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:52,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-06 22:20:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-11-06 22:20:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 28 [2020-11-06 22:20:52,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501691195] [2020-11-06 22:20:52,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-06 22:20:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-06 22:20:52,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=471, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:20:52,802 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 28 states. [2020-11-06 22:20:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:54,054 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-06 22:20:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-06 22:20:54,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 135 [2020-11-06 22:20:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:54,059 INFO L225 Difference]: With dead ends: 85 [2020-11-06 22:20:54,059 INFO L226 Difference]: Without dead ends: 80 [2020-11-06 22:20:54,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=862, Invalid=1688, Unknown=0, NotChecked=0, Total=2550 [2020-11-06 22:20:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-06 22:20:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-06 22:20:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-06 22:20:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-11-06 22:20:54,070 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 135 [2020-11-06 22:20:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:54,071 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-11-06 22:20:54,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-06 22:20:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-11-06 22:20:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-06 22:20:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:54,073 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:54,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-06 22:20:54,288 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1444475249, now seen corresponding path program 21 times [2020-11-06 22:20:54,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:54,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958803409] [2020-11-06 22:20:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:54,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-06 22:20:55,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958803409] [2020-11-06 22:20:55,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704123266] [2020-11-06 22:20:55,371 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:55,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-06 22:20:55,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-06 22:20:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-06 22:20:55,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:55,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 29 [2020-11-06 22:20:55,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721960711] [2020-11-06 22:20:55,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-06 22:20:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-06 22:20:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=503, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:20:55,637 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 29 states. [2020-11-06 22:20:56,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:56,980 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-11-06 22:20:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:20:56,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-11-06 22:20:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:56,985 INFO L225 Difference]: With dead ends: 88 [2020-11-06 22:20:56,985 INFO L226 Difference]: Without dead ends: 83 [2020-11-06 22:20:56,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=935, Invalid=1821, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:20:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-06 22:20:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-06 22:20:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-06 22:20:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-11-06 22:20:56,992 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 141 [2020-11-06 22:20:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:56,992 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-11-06 22:20:56,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-06 22:20:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-11-06 22:20:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-11-06 22:20:56,993 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:56,994 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:57,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-06 22:20:57,198 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:57,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1489069125, now seen corresponding path program 22 times [2020-11-06 22:20:57,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:57,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608990877] [2020-11-06 22:20:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:57,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-06 22:20:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608990877] [2020-11-06 22:20:58,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730441639] [2020-11-06 22:20:58,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:58,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:58,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-06 22:20:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-11-06 22:20:58,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:58,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 30 [2020-11-06 22:20:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041823250] [2020-11-06 22:20:58,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-06 22:20:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-06 22:20:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=536, Unknown=0, NotChecked=0, Total=870 [2020-11-06 22:20:58,719 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 30 states. [2020-11-06 22:21:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:00,166 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-11-06 22:21:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-06 22:21:00,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-11-06 22:21:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:00,168 INFO L225 Difference]: With dead ends: 91 [2020-11-06 22:21:00,168 INFO L226 Difference]: Without dead ends: 86 [2020-11-06 22:21:00,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1011, Invalid=1959, Unknown=0, NotChecked=0, Total=2970 [2020-11-06 22:21:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-06 22:21:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-11-06 22:21:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-06 22:21:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-11-06 22:21:00,176 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 147 [2020-11-06 22:21:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:00,176 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-11-06 22:21:00,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-06 22:21:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-11-06 22:21:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-06 22:21:00,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:00,178 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:00,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:00,393 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:00,394 INFO L82 PathProgramCache]: Analyzing trace with hash 555515279, now seen corresponding path program 23 times [2020-11-06 22:21:00,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796025188] [2020-11-06 22:21:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-06 22:21:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796025188] [2020-11-06 22:21:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954285269] [2020-11-06 22:21:01,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:01,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-11-06 22:21:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-06 22:21:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-11-06 22:21:01,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:01,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 31 [2020-11-06 22:21:01,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314230852] [2020-11-06 22:21:01,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:21:01,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:01,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:21:01,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:21:01,949 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 31 states. [2020-11-06 22:21:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:03,444 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-11-06 22:21:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-06 22:21:03,445 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2020-11-06 22:21:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:03,446 INFO L225 Difference]: With dead ends: 94 [2020-11-06 22:21:03,446 INFO L226 Difference]: Without dead ends: 89 [2020-11-06 22:21:03,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1090, Invalid=2102, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:21:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-06 22:21:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-11-06 22:21:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-06 22:21:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-11-06 22:21:03,453 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 153 [2020-11-06 22:21:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:03,454 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-11-06 22:21:03,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:21:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-11-06 22:21:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-11-06 22:21:03,455 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:03,455 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:03,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-06 22:21:03,656 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -341431611, now seen corresponding path program 24 times [2020-11-06 22:21:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:03,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38234358] [2020-11-06 22:21:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:03,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:04,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-06 22:21:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38234358] [2020-11-06 22:21:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824506531] [2020-11-06 22:21:05,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:05,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-06 22:21:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-06 22:21:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-11-06 22:21:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 32 [2020-11-06 22:21:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685573129] [2020-11-06 22:21:05,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-06 22:21:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-06 22:21:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=605, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:21:05,324 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 32 states. [2020-11-06 22:21:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:06,901 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-11-06 22:21:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-06 22:21:06,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 159 [2020-11-06 22:21:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:06,904 INFO L225 Difference]: With dead ends: 97 [2020-11-06 22:21:06,904 INFO L226 Difference]: Without dead ends: 92 [2020-11-06 22:21:06,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1172, Invalid=2250, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:21:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-06 22:21:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-06 22:21:06,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-06 22:21:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-11-06 22:21:06,911 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 159 [2020-11-06 22:21:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:06,911 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-11-06 22:21:06,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-06 22:21:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-11-06 22:21:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-11-06 22:21:06,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:06,912 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:07,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:07,127 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash -28140401, now seen corresponding path program 25 times [2020-11-06 22:21:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:07,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182864601] [2020-11-06 22:21:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:21:07,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:21:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:21:07,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:21:07,260 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:21:07,260 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:21:07,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-06 22:21:07,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:21:07 BoogieIcfgContainer [2020-11-06 22:21:07,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:21:07,336 INFO L168 Benchmark]: Toolchain (without parser) took 61502.82 ms. Allocated memory was 151.0 MB in the beginning and 478.2 MB in the end (delta: 327.2 MB). Free memory was 126.3 MB in the beginning and 221.3 MB in the end (delta: -95.0 MB). Peak memory consumption was 233.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:07,336 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:21:07,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:07,337 INFO L168 Benchmark]: Boogie Preprocessor took 34.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:07,338 INFO L168 Benchmark]: RCFGBuilder took 438.84 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 103.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:07,338 INFO L168 Benchmark]: TraceAbstraction took 60712.61 ms. Allocated memory was 151.0 MB in the beginning and 478.2 MB in the end (delta: 327.2 MB). Free memory was 103.0 MB in the beginning and 221.3 MB in the end (delta: -118.3 MB). Peak memory consumption was 210.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:07,340 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 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 438.84 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 103.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 60712.61 ms. Allocated memory was 151.0 MB in the beginning and 478.2 MB in the end (delta: 327.2 MB). Free memory was 103.0 MB in the beginning and 221.3 MB in the end (delta: -118.3 MB). Peak memory consumption was 210.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 25; VAL [input=25] [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=25, input=25] [L13] int result = id(input); [L14] COND TRUE result == 25 VAL [input=25, result=25] [L15] CALL reach_error() [L4] __assert_fail("0", "id_i25_o25-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 60.5s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 29.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 347 SDtfs, 1702 SDslu, 1202 SDs, 0 SdLazy, 3477 SolverSat, 1191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3692 GetRequests, 2664 SyntacticMatches, 0 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11181 ImplicationChecksByTransitivity, 34.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 22.4s InterpolantComputationTime, 4500 NumberOfCodeBlocks, 4500 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209272 SizeOfPredicates, 275 NumberOfNonLiveVariables, 6552 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...