/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_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:16:22,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:16:22,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:16:23,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:16:23,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:16:23,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:16:23,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:16:23,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:16:23,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:16:23,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:16:23,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:16:23,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:16:23,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:16:23,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:16:23,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:16:23,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:16:23,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:16:23,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:16:23,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:16:23,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:16:23,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:16:23,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:16:23,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:16:23,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:16:23,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:16:23,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:16:23,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:16:23,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:16:23,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:16:23,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:16:23,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:16:23,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:16:23,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:16:23,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:16:23,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:16:23,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:16:23,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:16:23,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:16:23,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:16:23,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:16:23,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:16:23,209 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:16:23,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:16:23,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:16:23,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:16:23,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:16:23,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:16:23,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:16:23,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:16:23,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:16:23,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:16:23,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:16:23,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:16:23,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:16:23,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:16:23,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:16:23,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:16:23,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:16:23,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:23,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:16:23,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:16:23,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:16:23,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:16:23,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:16:23,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:16:23,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:16:23,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:16:23,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:16:23,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:16:23,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:16:23,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:16:23,703 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:16:23,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-10-23 18:16:23,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac0df45f/0ddd9d9ef3cc4a49b3610cd5fd88b46c/FLAG5d3c97769 [2020-10-23 18:16:24,449 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:16:24,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-10-23 18:16:24,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac0df45f/0ddd9d9ef3cc4a49b3610cd5fd88b46c/FLAG5d3c97769 [2020-10-23 18:16:24,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac0df45f/0ddd9d9ef3cc4a49b3610cd5fd88b46c [2020-10-23 18:16:24,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:16:24,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:16:24,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:24,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:16:24,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:16:24,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:24" (1/1) ... [2020-10-23 18:16:24,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59910738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:24, skipping insertion in model container [2020-10-23 18:16:24,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:24" (1/1) ... [2020-10-23 18:16:24,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:16:24,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:16:25,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:25,044 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:16:25,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:25,076 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:16:25,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25 WrapperNode [2020-10-23 18:16:25,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:25,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:16:25,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:16:25,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:16:25,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... [2020-10-23 18:16:25,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:16:25,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:16:25,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:16:25,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:16:25,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:25,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:16:25,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:16:25,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:16:25,194 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:16:25,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:16:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:16:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:16:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:16:25,194 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:16:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:16:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:16:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:16:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:16:25,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:16:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:16:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:16:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:16:25,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:16:25,444 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:16:25,445 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:16:25,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:25 BoogieIcfgContainer [2020-10-23 18:16:25,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:16:25,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:16:25,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:16:25,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:16:25,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:16:24" (1/3) ... [2020-10-23 18:16:25,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70724a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:25, skipping insertion in model container [2020-10-23 18:16:25,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:25" (2/3) ... [2020-10-23 18:16:25,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70724a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:25, skipping insertion in model container [2020-10-23 18:16:25,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:25" (3/3) ... [2020-10-23 18:16:25,457 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-10-23 18:16:25,472 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:16:25,477 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:16:25,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:16:25,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:16:25,541 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:16:25,541 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:16:25,541 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:16:25,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:16:25,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:16:25,542 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:16:25,542 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:16:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:16:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:16:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:25,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:25,568 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:16:25,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:25,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591741757] [2020-10-23 18:16:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:16:26,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591741757] [2020-10-23 18:16:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:16:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:16:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001972350] [2020-10-23 18:16:26,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:16:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:16:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:16:26,055 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:16:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:26,315 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-23 18:16:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:16:26,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:16:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:26,327 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:16:26,327 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:16:26,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:16:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:16:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:16:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:16:26,380 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:16:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:26,381 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:16:26,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:16:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:16:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:16:26,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:26,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:26,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:16:26,384 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:16:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:26,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674576464] [2020-10-23 18:16:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:16:26,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674576464] [2020-10-23 18:16:26,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122626217] [2020-10-23 18:16:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:16:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:16:26,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:26,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 18:16:26,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797595351] [2020-10-23 18:16:26,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:16:26,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:26,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:16:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:26,743 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-23 18:16:26,934 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:16:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:27,186 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:16:27,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:16:27,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:16:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:27,187 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:16:27,188 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:16:27,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:16:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:16:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:16:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:16:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:16:27,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:16:27,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:27,198 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:16:27,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:16:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:16:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:16:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:27,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:27,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:16:27,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:27,406 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:16:27,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:27,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552176490] [2020-10-23 18:16:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:27,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:27,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:27,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552176490] [2020-10-23 18:16:27,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869347604] [2020-10-23 18:16:27,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:27,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:16:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:27,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-10-23 18:16:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236301016] [2020-10-23 18:16:27,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:27,795 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2020-10-23 18:16:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:28,277 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:16:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:28,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-23 18:16:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:28,279 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:16:28,279 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:16:28,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:28,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:16:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:16:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:16:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:16:28,288 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:16:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:28,289 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:16:28,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:16:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:16:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:28,291 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:28,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:28,506 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:16:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:28,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134689554] [2020-10-23 18:16:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:28,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134689554] [2020-10-23 18:16:28,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363777180] [2020-10-23 18:16:28,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:28,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:16:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:16:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:28,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:28,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-10-23 18:16:28,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727577070] [2020-10-23 18:16:28,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:28,925 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2020-10-23 18:16:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:29,520 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:16:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:29,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-23 18:16:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:29,522 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:16:29,522 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:16:29,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:16:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:16:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:16:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:16:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:16:29,531 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:16:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:29,531 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:16:29,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:16:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:16:29,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:29,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:29,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:29,748 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:29,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:16:29,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:29,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801395030] [2020-10-23 18:16:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801395030] [2020-10-23 18:16:29,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138454225] [2020-10-23 18:16:29,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:30,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:30,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:16:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:30,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:30,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:16:30,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128160211] [2020-10-23 18:16:30,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:16:30,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:16:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:16:30,119 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-10-23 18:16:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:30,521 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:16:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:30,522 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-23 18:16:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:30,523 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:16:30,523 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:16:30,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:16:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:16:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:16:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:16:30,532 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:16:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:30,533 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:16:30,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:16:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:16:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:16:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:30,534 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:30,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:30,742 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:16:30,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:30,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291089586] [2020-10-23 18:16:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:31,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291089586] [2020-10-23 18:16:31,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128794069] [2020-10-23 18:16:31,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:31,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:16:31,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:16:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:31,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:31,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2020-10-23 18:16:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702246016] [2020-10-23 18:16:31,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:16:31,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:31,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:16:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:16:31,394 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2020-10-23 18:16:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:32,259 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:16:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:32,260 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-23 18:16:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:32,262 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:16:32,262 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:16:32,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:16:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:16:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:16:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:16:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:16:32,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:16:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:32,272 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:16:32,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:16:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:16:32,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:16:32,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:32,274 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:32,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:16:32,488 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-10-23 18:16:32,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:32,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537826418] [2020-10-23 18:16:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537826418] [2020-10-23 18:16:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689500978] [2020-10-23 18:16:32,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:32,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:16:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:16:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:33,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2020-10-23 18:16:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449329815] [2020-10-23 18:16:33,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:16:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:16:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:16:33,126 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-23 18:16:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:33,585 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:16:33,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:33,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-23 18:16:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:33,587 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:16:33,587 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:16:33,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:16:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:16:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:16:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:16:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:16:33,596 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:16:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:33,596 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:16:33,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:16:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:16:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:16:33,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:33,598 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:33,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:33,812 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-10-23 18:16:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:33,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534031906] [2020-10-23 18:16:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:33,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:33,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:33,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:16:34,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534031906] [2020-10-23 18:16:34,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993397308] [2020-10-23 18:16:34,102 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 [2020-10-23 18:16:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:16:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:16:34,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:34,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2020-10-23 18:16:34,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288449267] [2020-10-23 18:16:34,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:34,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:34,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:34,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:34,251 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-10-23 18:16:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:34,793 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:16:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:16:34,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-23 18:16:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:34,796 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:16:34,797 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:16:34,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:16:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:16:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:16:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:16:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:16:34,814 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:16:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:34,815 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:16:34,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:16:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:16:34,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:34,816 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:35,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:35,018 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:35,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-10-23 18:16:35,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:35,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701502002] [2020-10-23 18:16:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:16:35,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701502002] [2020-10-23 18:16:35,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797451872] [2020-10-23 18:16:35,413 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 [2020-10-23 18:16:35,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:35,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:16:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:16:35,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:35,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-10-23 18:16:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807311369] [2020-10-23 18:16:35,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:16:35,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:16:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:16:35,583 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-10-23 18:16:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:36,178 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:16:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:16:36,179 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-23 18:16:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:36,183 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:16:36,184 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:16:36,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:16:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:16:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:16:36,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:16:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:16:36,200 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:16:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:36,200 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:16:36,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:16:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:16:36,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:16:36,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:36,204 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:36,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:16:36,418 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-10-23 18:16:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71248414] [2020-10-23 18:16:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:16:36,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71248414] [2020-10-23 18:16:36,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650626371] [2020-10-23 18:16:36,816 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 [2020-10-23 18:16:36,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:16:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:16:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:16:37,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:37,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 36 [2020-10-23 18:16:37,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599388962] [2020-10-23 18:16:37,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 18:16:37,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:37,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 18:16:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:16:37,496 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 36 states. [2020-10-23 18:16:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:38,992 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:16:38,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:16:38,992 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2020-10-23 18:16:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:38,994 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:16:38,994 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:16:38,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 18:16:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:16:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:16:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:16:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:16:39,005 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:16:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:16:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 18:16:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:16:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:16:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:39,007 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:39,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:39,221 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-10-23 18:16:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847223902] [2020-10-23 18:16:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:16:39,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847223902] [2020-10-23 18:16:39,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738653015] [2020-10-23 18:16:39,687 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 [2020-10-23 18:16:39,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:16:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:16:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2020-10-23 18:16:39,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037628666] [2020-10-23 18:16:39,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:39,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:39,876 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-10-23 18:16:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:40,583 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:16:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:40,584 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-23 18:16:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:40,586 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:16:40,586 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:16:40,588 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 [2020-10-23 18:16:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:16:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:16:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:16:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:16:40,596 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:16:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:40,596 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:16:40,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:16:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:16:40,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:40,598 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:40,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:40,812 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-10-23 18:16:40,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553931296] [2020-10-23 18:16:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:16:41,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553931296] [2020-10-23 18:16:41,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293401671] [2020-10-23 18:16:41,338 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 [2020-10-23 18:16:41,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:16:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:41,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:16:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:16:41,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:41,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 19 [2020-10-23 18:16:41,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130239485] [2020-10-23 18:16:41,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:16:41,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:16:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:41,523 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-10-23 18:16:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:42,283 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:16:42,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:16:42,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-23 18:16:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:42,285 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:16:42,286 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:16:42,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:16:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:16:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:16:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:16:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:16:42,294 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:16:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:42,294 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:16:42,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:16:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:16:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:16:42,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:42,296 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:42,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:16:42,509 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-10-23 18:16:42,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:42,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285713636] [2020-10-23 18:16:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:16:43,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285713636] [2020-10-23 18:16:43,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233020126] [2020-10-23 18:16:43,062 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 [2020-10-23 18:16:43,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:16:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:16:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:16:43,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:43,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 45 [2020-10-23 18:16:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125782488] [2020-10-23 18:16:43,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 18:16:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:43,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 18:16:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 18:16:43,992 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 45 states. [2020-10-23 18:16:46,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:46,052 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:16:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 18:16:46,053 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2020-10-23 18:16:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:46,054 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:16:46,054 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:16:46,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=924, Invalid=4188, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 18:16:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:16:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:16:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:16:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:16:46,072 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:16:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:46,074 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:16:46,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 18:16:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:16:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:16:46,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:46,078 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:46,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:16:46,293 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-10-23 18:16:46,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:46,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612406171] [2020-10-23 18:16:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:16:46,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612406171] [2020-10-23 18:16:46,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935950039] [2020-10-23 18:16:46,902 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 [2020-10-23 18:16:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:16:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:16:47,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:47,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2020-10-23 18:16:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148629653] [2020-10-23 18:16:47,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:16:47,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:16:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:16:47,077 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-10-23 18:16:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:47,927 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:16:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:16:47,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-23 18:16:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:47,930 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:16:47,930 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:16:47,931 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 [2020-10-23 18:16:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:16:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:16:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:16:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:16:47,939 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:16:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:47,940 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:16:47,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:16:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:16:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:16:47,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:47,941 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:48,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:16:48,156 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-10-23 18:16:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:48,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117600051] [2020-10-23 18:16:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:16:48,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117600051] [2020-10-23 18:16:48,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723150829] [2020-10-23 18:16:48,809 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 [2020-10-23 18:16:48,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:48,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:16:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:16:49,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:49,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2020-10-23 18:16:49,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176667728] [2020-10-23 18:16:49,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:16:49,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:49,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:16:49,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:49,004 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-10-23 18:16:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:49,928 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:16:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:16:49,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-10-23 18:16:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:49,930 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:16:49,930 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:16:49,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:16:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:16:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:16:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:16:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:16:49,940 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:16:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:49,940 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:16:49,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:16:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:16:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:16:49,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:49,941 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:50,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:50,155 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-10-23 18:16:50,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:50,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405772459] [2020-10-23 18:16:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:16:50,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405772459] [2020-10-23 18:16:50,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684581228] [2020-10-23 18:16:50,823 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 [2020-10-23 18:16:50,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:16:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:16:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:16:51,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:51,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 23 [2020-10-23 18:16:51,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387662738] [2020-10-23 18:16:51,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:16:51,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:16:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:16:51,036 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2020-10-23 18:16:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:52,021 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:16:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:16:52,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-10-23 18:16:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:52,024 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:16:52,024 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:16:52,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:16:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:16:52,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:16:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:16:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:16:52,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:16:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:52,034 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:16:52,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:16:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:16:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:16:52,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:52,035 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:52,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:16:52,251 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-10-23 18:16:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:52,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588420548] [2020-10-23 18:16:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:16:52,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588420548] [2020-10-23 18:16:52,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940916634] [2020-10-23 18:16:52,957 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 [2020-10-23 18:16:53,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:53,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:16:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:16:53,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:53,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2020-10-23 18:16:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557152523] [2020-10-23 18:16:53,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:16:53,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:16:53,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:16:53,154 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2020-10-23 18:16:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:54,184 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:16:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:16:54,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-23 18:16:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:54,187 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:16:54,187 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:16:54,189 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 [2020-10-23 18:16:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:16:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:16:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:16:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:16:54,195 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:16:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:54,196 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:16:54,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:16:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:16:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:16:54,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:54,197 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:54,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:16:54,411 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:54,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1831747727, now seen corresponding path program 17 times [2020-10-23 18:16:54,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:54,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865808626] [2020-10-23 18:16:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:16:55,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865808626] [2020-10-23 18:16:55,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119708471] [2020-10-23 18:16:55,310 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 [2020-10-23 18:16:55,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:16:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:16:55,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:16:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:56,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 60 [2020-10-23 18:16:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680369285] [2020-10-23 18:16:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 18:16:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 18:16:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 18:16:56,850 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 60 states. [2020-10-23 18:16:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:59,883 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 18:16:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 18:16:59,884 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2020-10-23 18:16:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:59,885 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:16:59,885 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:16:59,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1679, Invalid=7633, Unknown=0, NotChecked=0, Total=9312 [2020-10-23 18:16:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:16:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:16:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:16:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 18:16:59,906 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-10-23 18:16:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:59,907 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 18:16:59,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 18:16:59,907 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 18:16:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 18:16:59,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:59,908 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:00,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 18:17:00,112 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1286539077, now seen corresponding path program 18 times [2020-10-23 18:17:00,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:00,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308162328] [2020-10-23 18:17:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:17:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308162328] [2020-10-23 18:17:01,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752158919] [2020-10-23 18:17:01,068 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 [2020-10-23 18:17:01,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:17:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:17:01,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:17:02,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:02,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41] total 63 [2020-10-23 18:17:02,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626892471] [2020-10-23 18:17:02,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-23 18:17:02,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:02,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-23 18:17:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 18:17:02,825 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 63 states. [2020-10-23 18:17:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:06,280 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 18:17:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 18:17:06,280 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2020-10-23 18:17:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:06,281 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:17:06,281 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:17:06,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1857, Invalid=8445, Unknown=0, NotChecked=0, Total=10302 [2020-10-23 18:17:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:17:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:17:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:17:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 18:17:06,291 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-10-23 18:17:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:06,292 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 18:17:06,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-23 18:17:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 18:17:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 18:17:06,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:06,293 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:06,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:06,507 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash 626937743, now seen corresponding path program 19 times [2020-10-23 18:17:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:06,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864494603] [2020-10-23 18:17:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:17:07,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864494603] [2020-10-23 18:17:07,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738489022] [2020-10-23 18:17:07,449 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 [2020-10-23 18:17:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:17:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:17:07,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:07,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 27 [2020-10-23 18:17:07,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974035322] [2020-10-23 18:17:07,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:17:07,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:17:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:17:07,662 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 27 states. [2020-10-23 18:17:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:08,937 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 18:17:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:17:08,937 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2020-10-23 18:17:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:08,939 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:17:08,939 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:17:08,941 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 [2020-10-23 18:17:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:17:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 18:17:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 18:17:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 18:17:08,947 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-10-23 18:17:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:08,948 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 18:17:08,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:17:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 18:17:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 18:17:08,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:08,949 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:09,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:09,163 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:09,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1436396997, now seen corresponding path program 20 times [2020-10-23 18:17:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:09,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707250658] [2020-10-23 18:17:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:17:09,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:17:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:17:09,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:17:09,270 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:17:09,270 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:17:09,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:17:09,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:17:09 BoogieIcfgContainer [2020-10-23 18:17:09,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:17:09,363 INFO L168 Benchmark]: Toolchain (without parser) took 44538.44 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 126.2 MB in the beginning and 207.1 MB in the end (delta: -80.9 MB). Peak memory consumption was 147.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:09,364 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:17:09,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.31 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:09,368 INFO L168 Benchmark]: Boogie Preprocessor took 33.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:09,369 INFO L168 Benchmark]: RCFGBuilder took 334.21 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:09,369 INFO L168 Benchmark]: TraceAbstraction took 43913.29 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 102.8 MB in the beginning and 207.1 MB in the end (delta: -104.3 MB). Peak memory consumption was 123.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:09,372 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.6 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.31 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.25 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.21 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 43913.29 ms. Allocated memory was 151.0 MB in the beginning and 377.5 MB in the end (delta: 226.5 MB). Free memory was 102.8 MB in the beginning and 207.1 MB in the end (delta: -104.3 MB). Peak memory consumption was 123.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 20; VAL [input=20] [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=20, input=20] [L13] int result = id(input); [L14] COND TRUE result == 20 VAL [input=20, result=20] [L15] CALL reach_error() [L4] __assert_fail("0", "id_i20_o20-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 43.7s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 21.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 277 SDtfs, 1088 SDslu, 1002 SDs, 0 SdLazy, 2750 SolverSat, 851 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2467 GetRequests, 1704 SyntacticMatches, 0 SemanticMatches, 763 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8181 ImplicationChecksByTransitivity, 25.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 3000 NumberOfCodeBlocks, 3000 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2826 ConstructedInterpolants, 0 QuantifiedInterpolants, 639412 SizeOfPredicates, 155 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...