/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_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:19:47,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:19:47,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:19:47,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:19:47,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:19:47,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:19:47,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:19:47,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:19:47,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:19:47,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:19:47,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:19:47,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:19:47,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:19:47,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:19:47,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:19:47,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:19:47,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:19:47,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:19:47,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:19:47,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:19:47,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:19:47,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:19:47,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:19:47,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:19:47,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:19:47,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:19:47,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:19:47,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:19:47,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:19:47,399 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:19:47,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:19:47,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:19:47,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:19:47,402 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:19:47,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:19:47,403 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:19:47,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:19:47,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:19:47,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:19:47,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:19:47,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:19:47,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:19:47,406 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:19:47,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:19:47,406 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:19:47,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:19:47,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:19:47,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:19:47,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:19:47,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:19:47,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:47,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:19:47,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:19:47,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:19:47,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:19:47,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:19:47,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:19:47,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:19:47,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:19:47,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:19:47,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:19:47,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:19:47,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:19:47,871 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:19:47,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-11-06 22:19:47,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3e4d57/06b0090d26394c02939a33eb25c7943e/FLAGa1ed51496 [2020-11-06 22:19:48,687 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:19:48,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-11-06 22:19:48,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3e4d57/06b0090d26394c02939a33eb25c7943e/FLAGa1ed51496 [2020-11-06 22:19:49,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05a3e4d57/06b0090d26394c02939a33eb25c7943e [2020-11-06 22:19:49,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:19:49,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:19:49,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:49,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:19:49,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:19:49,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6507d4a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49, skipping insertion in model container [2020-11-06 22:19:49,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:19:49,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:19:49,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:49,278 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:19:49,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:49,308 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:19:49,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49 WrapperNode [2020-11-06 22:19:49,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:49,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:19:49,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:19:49,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:19:49,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... [2020-11-06 22:19:49,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:19:49,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:19:49,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:19:49,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:19:49,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:49,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:19:49,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:19:49,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:19:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:19:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:19:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:19:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:19:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:19:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:19:49,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:19:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:19:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:19:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:19:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:19:49,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:19:49,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:19:49,720 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:19:49,720 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:19:49,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:49 BoogieIcfgContainer [2020-11-06 22:19:49,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:19:49,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:19:49,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:19:49,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:19:49,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:19:49" (1/3) ... [2020-11-06 22:19:49,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b55d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:49, skipping insertion in model container [2020-11-06 22:19:49,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:49" (2/3) ... [2020-11-06 22:19:49,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b55d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:49, skipping insertion in model container [2020-11-06 22:19:49,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:49" (3/3) ... [2020-11-06 22:19:49,738 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-11-06 22:19:49,769 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:19:49,773 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:19:49,788 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:19:49,835 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:19:49,835 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:19:49,835 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:19:49,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:19:49,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:19:49,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:19:49,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:19:49,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:19:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:19:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:19:49,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:49,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:49,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:49,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-11-06 22:19:49,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:49,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516799971] [2020-11-06 22:19:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:50,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:19:50,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516799971] [2020-11-06 22:19:50,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:50,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687742092] [2020-11-06 22:19:50,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:50,532 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-06 22:19:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:50,804 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-06 22:19:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:50,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:19:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:50,816 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:19:50,816 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:19:50,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:19:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:19:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:19:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:19:50,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:19:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:50,869 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:19:50,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:19:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:19:50,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:50,871 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 22:19:50,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:19:50,872 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-11-06 22:19:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:50,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007307150] [2020-11-06 22:19:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:50,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:50,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:51,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007307150] [2020-11-06 22:19:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402661821] [2020-11-06 22:19:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:19:51,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:51,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:51,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-06 22:19:51,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037151563] [2020-11-06 22:19:51,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:19:51,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:19:51,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:51,256 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-11-06 22:19:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:51,490 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-06 22:19:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:19:51,491 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-06 22:19:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:51,492 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:19:51,493 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:19:51,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:19:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:19:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:19:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:19:51,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-11-06 22:19:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:51,503 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:19:51,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:19:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:19:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:19:51,504 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:51,504 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 22:19:51,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:19:51,719 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-11-06 22:19:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:51,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139534416] [2020-11-06 22:19:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:51,941 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 22:19:51,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139534416] [2020-11-06 22:19:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001107240] [2020-11-06 22:19:51,942 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 22:19:51,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:19:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:52,092 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 22:19:52,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:52,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-06 22:19:52,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109654679] [2020-11-06 22:19:52,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:19:52,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:19:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:19:52,098 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-11-06 22:19:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:52,389 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-06 22:19:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:19:52,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-06 22:19:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:52,391 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:19:52,391 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:19:52,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:19:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:19:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:19:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:19:52,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-06 22:19:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:52,402 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:19:52,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:19:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:19:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:19:52,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:52,404 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 22:19:52,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:52,619 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-11-06 22:19:52,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431411463] [2020-11-06 22:19:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:52,802 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 22:19:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431411463] [2020-11-06 22:19:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764526316] [2020-11-06 22:19:52,804 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 22:19:52,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:19:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:19:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:52,948 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 22:19:52,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:52,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-11-06 22:19:52,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920124905] [2020-11-06 22:19:52,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:19:52,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:19:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:19:52,951 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-11-06 22:19:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:53,272 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-06 22:19:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:53,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-11-06 22:19:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:53,274 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:19:53,274 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:19:53,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:19:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:19:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-06 22:19:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:19:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-06 22:19:53,283 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-11-06 22:19:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:53,283 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-06 22:19:53,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:19:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-06 22:19:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:19:53,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:53,285 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 22:19:53,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:53,502 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:53,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-11-06 22:19:53,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:53,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341186245] [2020-11-06 22:19:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:53,708 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 22:19:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341186245] [2020-11-06 22:19:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391135027] [2020-11-06 22:19:53,709 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 22:19:53,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:19:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:19:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:53,842 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 22:19:53,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:53,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-11-06 22:19:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101795699] [2020-11-06 22:19:53,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:19:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:19:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:19:53,846 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-11-06 22:19:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:54,244 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-06 22:19:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:19:54,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-06 22:19:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:54,246 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:19:54,247 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:19:54,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:19:54,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:19:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:19:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:19:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-06 22:19:54,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-06 22:19:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:54,255 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-06 22:19:54,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:19:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-06 22:19:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:19:54,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:54,257 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 22:19:54,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:54,473 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-11-06 22:19:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:54,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558473079] [2020-11-06 22:19:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:54,754 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 22:19:54,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558473079] [2020-11-06 22:19:54,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031670230] [2020-11-06 22:19:54,755 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 22:19:54,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-06 22:19:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:54,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:19:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:54,900 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 22:19:54,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:54,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2020-11-06 22:19:54,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711716011] [2020-11-06 22:19:54,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:19:54,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:19:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:19:54,903 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2020-11-06 22:19:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:55,344 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-06 22:19:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:19:55,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-11-06 22:19:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:55,347 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:19:55,347 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:19:55,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:19:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:19:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:19:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:19:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-06 22:19:55,357 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-11-06 22:19:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:55,358 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-06 22:19:55,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:19:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-06 22:19:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:19:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:55,360 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 22:19:55,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:19:55,574 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-11-06 22:19:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:55,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656812541] [2020-11-06 22:19:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:55,868 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 22:19:55,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656812541] [2020-11-06 22:19:55,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028861920] [2020-11-06 22:19:55,869 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 22:19:55,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:19:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:19:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:56,013 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 22:19:56,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:56,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2020-11-06 22:19:56,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018588890] [2020-11-06 22:19:56,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:19:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:19:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:19:56,016 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-11-06 22:19:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:56,548 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-06 22:19:56,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:19:56,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-06 22:19:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:56,550 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:19:56,551 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:19:56,552 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 22:19:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:19:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:19:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:19:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:19:56,562 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-11-06 22:19:56,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:56,562 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:19:56,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:19:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:19:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:19:56,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:56,564 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 22:19:56,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:56,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-11-06 22:19:56,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:56,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705644387] [2020-11-06 22:19:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:56,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:57,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:57,054 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 22:19:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705644387] [2020-11-06 22:19:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860315802] [2020-11-06 22:19:57,054 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 22:19:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:19:57,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:57,191 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 22:19:57,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:57,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2020-11-06 22:19:57,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762672145] [2020-11-06 22:19:57,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:19:57,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:19:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:19:57,194 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-11-06 22:19:57,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:57,759 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-06 22:19:57,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:19:57,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-11-06 22:19:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:57,762 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:19:57,762 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:19:57,764 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 22:19:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:19:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:19:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:19:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-06 22:19:57,771 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-11-06 22:19:57,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:57,772 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-06 22:19:57,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:19:57,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-06 22:19:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 22:19:57,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:57,773 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 22:19:57,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:19:57,988 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:57,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-11-06 22:19:57,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:57,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182914134] [2020-11-06 22:19:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:58,290 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 22:19:58,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182914134] [2020-11-06 22:19:58,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591763662] [2020-11-06 22:19:58,291 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 22:19:58,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:19:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:58,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:19:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:58,439 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 22:19:58,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:58,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-11-06 22:19:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482399225] [2020-11-06 22:19:58,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:19:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:19:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:58,442 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-11-06 22:19:59,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:59,080 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-06 22:19:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:19:59,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-11-06 22:19:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:59,083 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:19:59,083 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:19:59,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:19:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:19:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-06 22:19:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:19:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-06 22:19:59,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-11-06 22:19:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:59,092 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-06 22:19:59,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:19:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-06 22:19:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:19:59,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:59,094 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 22:19:59,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:19:59,308 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-11-06 22:19:59,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:59,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353769777] [2020-11-06 22:19:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:59,695 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 22:19:59,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353769777] [2020-11-06 22:19:59,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346078114] [2020-11-06 22:19:59,698 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 22:19:59,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-06 22:19:59,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:19:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-06 22:19:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:59,924 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 22:19:59,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:59,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2020-11-06 22:19:59,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018482762] [2020-11-06 22:19:59,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:19:59,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:19:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:19:59,927 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2020-11-06 22:20:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:00,585 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-06 22:20:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:20:00,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-11-06 22:20:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:00,589 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:20:00,590 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:20:00,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:20:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:20:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-06 22:20:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:20:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-06 22:20:00,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-11-06 22:20:00,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:00,609 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-06 22:20:00,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:20:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-06 22:20:00,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-06 22:20:00,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:00,611 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 22:20:00,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:00,812 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-11-06 22:20:00,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:00,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542371858] [2020-11-06 22:20:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:00,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:00,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:00,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:01,249 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 22:20:01,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542371858] [2020-11-06 22:20:01,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404940474] [2020-11-06 22:20:01,250 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 22:20:01,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:20:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:01,449 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 22:20:01,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:01,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2020-11-06 22:20:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550011061] [2020-11-06 22:20:01,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:20:01,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:20:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:20:01,453 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-11-06 22:20:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:02,206 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-11-06 22:20:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-06 22:20:02,206 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-11-06 22:20:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:02,208 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:20:02,208 INFO L226 Difference]: Without dead ends: 50 [2020-11-06 22:20:02,210 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 22:20:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-06 22:20:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-06 22:20:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:20:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-06 22:20:02,218 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-11-06 22:20:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:02,218 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-06 22:20:02,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:20:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-06 22:20:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-06 22:20:02,225 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:02,225 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 22:20:02,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:02,426 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-11-06 22:20:02,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:02,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919827052] [2020-11-06 22:20:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:02,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:03,005 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 22:20:03,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919827052] [2020-11-06 22:20:03,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427023323] [2020-11-06 22:20:03,006 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 22:20:03,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-06 22:20:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-06 22:20:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:03,205 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 22:20:03,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:03,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 19 [2020-11-06 22:20:03,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564678570] [2020-11-06 22:20:03,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:20:03,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:20:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:20:03,208 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-11-06 22:20:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:03,926 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-06 22:20:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:20:03,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-11-06 22:20:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:03,929 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:20:03,929 INFO L226 Difference]: Without dead ends: 53 [2020-11-06 22:20:03,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:20:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-06 22:20:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-06 22:20:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-06 22:20:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-11-06 22:20:03,938 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-11-06 22:20:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:03,938 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-11-06 22:20:03,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:20:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-11-06 22:20:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-06 22:20:03,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:03,940 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 22:20:04,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-06 22:20:04,153 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-11-06 22:20:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:04,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254341590] [2020-11-06 22:20:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:04,847 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 22:20:04,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254341590] [2020-11-06 22:20:04,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149506134] [2020-11-06 22:20:04,849 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 22:20:04,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-06 22:20:04,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-06 22:20:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:05,111 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 22:20:05,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:05,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 20 [2020-11-06 22:20:05,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963140286] [2020-11-06 22:20:05,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-06 22:20:05,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:05,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-06 22:20:05,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:20:05,116 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2020-11-06 22:20:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:05,980 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-11-06 22:20:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 22:20:05,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-11-06 22:20:05,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:05,983 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:20:05,983 INFO L226 Difference]: Without dead ends: 56 [2020-11-06 22:20:05,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:20:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-06 22:20:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-06 22:20:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:20:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-11-06 22:20:05,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-11-06 22:20:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:05,992 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-11-06 22:20:05,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-06 22:20:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-11-06 22:20:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-06 22:20:05,994 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:05,994 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 22:20:06,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:20:06,210 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-11-06 22:20:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:06,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477665808] [2020-11-06 22:20:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:06,921 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 22:20:06,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477665808] [2020-11-06 22:20:06,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711642358] [2020-11-06 22:20:06,927 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 22:20:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-06 22:20:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:07,150 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 22:20:07,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:07,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2020-11-06 22:20:07,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390927250] [2020-11-06 22:20:07,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:20:07,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:20:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:20:07,153 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-11-06 22:20:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:08,033 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-11-06 22:20:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:20:08,033 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-11-06 22:20:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:08,034 INFO L225 Difference]: With dead ends: 64 [2020-11-06 22:20:08,034 INFO L226 Difference]: Without dead ends: 59 [2020-11-06 22:20:08,035 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 22:20:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-06 22:20:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-06 22:20:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:20:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-11-06 22:20:08,044 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-11-06 22:20:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:08,044 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-11-06 22:20:08,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:20:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-11-06 22:20:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-06 22:20:08,046 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:08,046 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 22:20:08,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 22:20:08,247 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-11-06 22:20:08,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:08,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870332272] [2020-11-06 22:20:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,934 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 22:20:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870332272] [2020-11-06 22:20:08,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485977185] [2020-11-06 22:20:08,935 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 22:20:09,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:09,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-06 22:20:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:09,119 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 22:20:09,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:09,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2020-11-06 22:20:09,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281593008] [2020-11-06 22:20:09,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-06 22:20:09,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-06 22:20:09,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:20:09,122 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-11-06 22:20:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:10,025 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-11-06 22:20:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:20:10,026 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-11-06 22:20:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:10,026 INFO L225 Difference]: With dead ends: 67 [2020-11-06 22:20:10,026 INFO L226 Difference]: Without dead ends: 62 [2020-11-06 22:20:10,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:20:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-06 22:20:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-06 22:20:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-06 22:20:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-11-06 22:20:10,035 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-11-06 22:20:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:10,036 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-11-06 22:20:10,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-06 22:20:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-11-06 22:20:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-06 22:20:10,037 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:10,037 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 22:20:10,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:10,252 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-11-06 22:20:10,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:10,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502621909] [2020-11-06 22:20:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,013 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 22:20:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502621909] [2020-11-06 22:20:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033528559] [2020-11-06 22:20:11,014 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 22:20:11,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-06 22:20:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-06 22:20:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:11,248 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 22:20:11,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:11,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 23 [2020-11-06 22:20:11,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616305307] [2020-11-06 22:20:11,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:20:11,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:20:11,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:20:11,251 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2020-11-06 22:20:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:12,290 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-06 22:20:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:20:12,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-11-06 22:20:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:12,293 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:20:12,293 INFO L226 Difference]: Without dead ends: 65 [2020-11-06 22:20:12,294 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 22:20:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-06 22:20:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-11-06 22:20:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-06 22:20:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-11-06 22:20:12,301 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-11-06 22:20:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:12,302 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-11-06 22:20:12,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:20:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-11-06 22:20:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-06 22:20:12,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:12,304 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 22:20:12,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-06 22:20:12,521 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-11-06 22:20:12,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:12,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565554491] [2020-11-06 22:20:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:12,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:13,264 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 22:20:13,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565554491] [2020-11-06 22:20:13,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281182357] [2020-11-06 22:20:13,265 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 22:20:13,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:13,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-06 22:20:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:13,450 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 22:20:13,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:13,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2020-11-06 22:20:13,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697083543] [2020-11-06 22:20:13,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-06 22:20:13,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:13,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-06 22:20:13,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:20:13,453 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2020-11-06 22:20:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:14,507 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-11-06 22:20:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-06 22:20:14,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-11-06 22:20:14,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:14,510 INFO L225 Difference]: With dead ends: 73 [2020-11-06 22:20:14,510 INFO L226 Difference]: Without dead ends: 68 [2020-11-06 22:20:14,513 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 22:20:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-06 22:20:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-06 22:20:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-06 22:20:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-11-06 22:20:14,520 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-11-06 22:20:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:14,520 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-11-06 22:20:14,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-06 22:20:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-11-06 22:20:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-11-06 22:20:14,521 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:14,521 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 22:20:14,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-06 22:20:14,735 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:14,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1831747727, now seen corresponding path program 17 times [2020-11-06 22:20:14,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:14,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179200400] [2020-11-06 22:20:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:14,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:15,562 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 22:20:15,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179200400] [2020-11-06 22:20:15,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514669943] [2020-11-06 22:20:15,563 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 22:20:15,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-06 22:20:15,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-06 22:20:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:15,804 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 22:20:15,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:15,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2020-11-06 22:20:15,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65430300] [2020-11-06 22:20:15,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-06 22:20:15,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-06 22:20:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2020-11-06 22:20:15,808 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 25 states. [2020-11-06 22:20:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:16,941 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-11-06 22:20:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:20:16,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-11-06 22:20:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:16,944 INFO L225 Difference]: With dead ends: 76 [2020-11-06 22:20:16,944 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:20:16,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=661, Invalid=1319, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:20:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:20:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-06 22:20:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:20:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-11-06 22:20:16,951 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-11-06 22:20:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:16,952 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-11-06 22:20:16,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-06 22:20:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-11-06 22:20:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-06 22:20:16,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:16,953 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 22:20:17,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-06 22:20:17,158 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1286539077, now seen corresponding path program 18 times [2020-11-06 22:20:17,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:17,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725118220] [2020-11-06 22:20:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:17,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:18,129 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 22:20:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725118220] [2020-11-06 22:20:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708809320] [2020-11-06 22:20:18,130 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 22:20:18,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-06 22:20:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-06 22:20:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:18,463 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 22:20:18,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:18,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 26 [2020-11-06 22:20:18,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386546150] [2020-11-06 22:20:18,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-06 22:20:18,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-06 22:20:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:20:18,467 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 26 states. [2020-11-06 22:20:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:19,605 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-11-06 22:20:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:20:19,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2020-11-06 22:20:19,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:19,607 INFO L225 Difference]: With dead ends: 79 [2020-11-06 22:20:19,607 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:20:19,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=725, Invalid=1437, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 22:20:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:20:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-06 22:20:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:20:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-11-06 22:20:19,615 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-11-06 22:20:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:19,615 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-11-06 22:20:19,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-06 22:20:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-11-06 22:20:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-06 22:20:19,616 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:19,617 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 22:20:19,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:19,822 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 626937743, now seen corresponding path program 19 times [2020-11-06 22:20:19,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:19,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114889731] [2020-11-06 22:20:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:19,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:19,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:19,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,892 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 22:20:20,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114889731] [2020-11-06 22:20:20,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093787788] [2020-11-06 22:20:20,893 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 22:20:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-06 22:20:20,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:21,146 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 22:20:21,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:21,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 27 [2020-11-06 22:20:21,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216290352] [2020-11-06 22:20:21,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 22:20:21,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:21,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 22:20:21,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:20:21,149 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 27 states. [2020-11-06 22:20:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:22,346 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-11-06 22:20:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:20:22,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2020-11-06 22:20:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:22,349 INFO L225 Difference]: With dead ends: 82 [2020-11-06 22:20:22,349 INFO L226 Difference]: Without dead ends: 77 [2020-11-06 22:20:22,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=792, Invalid=1560, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:20:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-06 22:20:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-06 22:20:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-06 22:20:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-11-06 22:20:22,357 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-11-06 22:20:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:22,357 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-11-06 22:20:22,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 22:20:22,357 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-11-06 22:20:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-11-06 22:20:22,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:22,358 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 22:20:22,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:22,572 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1436396997, now seen corresponding path program 20 times [2020-11-06 22:20:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:22,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266125023] [2020-11-06 22:20:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:22,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:23,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:24,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:25,191 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 22:20:25,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266125023] [2020-11-06 22:20:25,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015763082] [2020-11-06 22:20:25,192 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 22:20:25,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 87 conjunts are in the unsatisfiable core [2020-11-06 22:20:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:25,387 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 22:20:25,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:25,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2020-11-06 22:20:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179033721] [2020-11-06 22:20:25,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-11-06 22:20:25,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-11-06 22:20:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-11-06 22:20:25,390 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 46 states. [2020-11-06 22:20:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:30,785 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-11-06 22:20:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-06 22:20:30,785 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 135 [2020-11-06 22:20:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:30,787 INFO L225 Difference]: With dead ends: 85 [2020-11-06 22:20:30,787 INFO L226 Difference]: Without dead ends: 80 [2020-11-06 22:20:30,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2020-11-06 22:20:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-06 22:20:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-06 22:20:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-06 22:20:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-11-06 22:20:30,796 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 135 [2020-11-06 22:20:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:30,796 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-11-06 22:20:30,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-11-06 22:20:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-11-06 22:20:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-11-06 22:20:30,798 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:30,798 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 22:20:31,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-06 22:20:31,012 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:31,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1444475249, now seen corresponding path program 21 times [2020-11-06 22:20:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:31,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742812242] [2020-11-06 22:20:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:31,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-06 22:20:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742812242] [2020-11-06 22:20:32,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153821076] [2020-11-06 22:20:32,243 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 22:20:32,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-11-06 22:20:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-06 22:20:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-11-06 22:20:32,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:20:32,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [27] total 29 [2020-11-06 22:20:32,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591363437] [2020-11-06 22:20:32,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-06 22:20:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-06 22:20:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:20:32,542 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 26 states. [2020-11-06 22:20:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:33,258 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-11-06 22:20:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-06 22:20:33,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 141 [2020-11-06 22:20:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:33,262 INFO L225 Difference]: With dead ends: 80 [2020-11-06 22:20:33,262 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:20:33,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=838, Invalid=1712, Unknown=0, NotChecked=0, Total=2550 [2020-11-06 22:20:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:20:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:20:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:20:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:20:33,264 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 141 [2020-11-06 22:20:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:33,264 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:20:33,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-06 22:20:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:20:33,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:20:33,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-06 22:20:33,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:20:33,595 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:20:33,595 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:20:33,595 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:20:33,596 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:20:33,596 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:20:33,596 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:20:33,597 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:20:33,597 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:20:33,597 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-11-06 22:20:33,597 INFO L262 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:20:33,597 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L262 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= main_~input~0 20) (<= 20 main_~input~0)) [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L262 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-11-06 22:20:33,598 INFO L269 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-06 22:20:33,598 INFO L266 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-06 22:20:33,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:20:33 BoogieIcfgContainer [2020-11-06 22:20:33,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:20:33,608 INFO L168 Benchmark]: Toolchain (without parser) took 44535.61 ms. Allocated memory was 155.2 MB in the beginning and 488.6 MB in the end (delta: 333.4 MB). Free memory was 130.5 MB in the beginning and 355.1 MB in the end (delta: -224.6 MB). Peak memory consumption was 110.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:33,608 INFO L168 Benchmark]: CDTParser took 1.55 ms. Allocated memory is still 155.2 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:20:33,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.71 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 121.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:33,615 INFO L168 Benchmark]: Boogie Preprocessor took 28.86 ms. Allocated memory is still 155.2 MB. Free memory was 120.8 MB in the beginning and 119.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:33,616 INFO L168 Benchmark]: RCFGBuilder took 382.43 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 107.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:33,618 INFO L168 Benchmark]: TraceAbstraction took 43878.43 ms. Allocated memory was 155.2 MB in the beginning and 488.6 MB in the end (delta: 333.4 MB). Free memory was 107.1 MB in the beginning and 355.1 MB in the end (delta: -248.0 MB). Peak memory consumption was 86.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:33,620 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.55 ms. Allocated memory is still 155.2 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.71 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 121.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.86 ms. Allocated memory is still 155.2 MB. Free memory was 120.8 MB in the beginning and 119.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 382.43 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 107.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 43878.43 ms. Allocated memory was 155.2 MB in the beginning and 488.6 MB in the end (delta: 333.4 MB). Free memory was 107.1 MB in the beginning and 355.1 MB in the end (delta: -248.0 MB). Peak memory consumption was 86.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 43.6s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 20.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 1397 SDslu, 1148 SDs, 0 SdLazy, 5017 SolverSat, 793 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2885 GetRequests, 2190 SyntacticMatches, 1 SemanticMatches, 694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4442 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 32 NumberOfFragments, 47 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 124 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 15.7s InterpolantComputationTime, 3417 NumberOfCodeBlocks, 3417 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3374 ConstructedInterpolants, 0 QuantifiedInterpolants, 908200 SizeOfPredicates, 252 NumberOfNonLiveVariables, 5271 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...