/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/sum_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:19:36,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:19:36,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:19:36,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:19:36,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:19:36,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:19:36,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:19:36,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:19:36,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:19:36,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:19:36,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:19:36,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:19:36,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:19:36,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:19:36,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:19:36,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:19:36,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:19:36,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:19:36,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:19:36,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:19:36,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:19:36,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:19:36,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:19:36,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:19:36,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:19:36,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:19:36,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:19:36,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:19:36,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:19:36,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:19:36,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:19:36,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:19:36,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:19:36,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:19:36,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:19:36,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:19:36,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:19:36,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:19:36,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:19:36,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:19:36,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:19:36,929 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 18:19:36,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:19:36,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:19:36,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:19:36,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:19:36,986 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:19:36,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:19:36,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:19:36,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:19:36,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:19:36,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:19:36,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:19:36,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:19:36,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:19:36,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:19:36,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:19:36,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:19:36,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:19:36,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:19:36,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:19:36,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:19:36,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:19:36,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:19:36,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:19:36,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:19:36,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:19:37,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:19:37,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:19:37,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:19:37,389 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:19:37,391 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:19:37,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-10-23 18:19:37,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d75e340/bc365e55029f48e397a0679bc2737588/FLAG80b56474c [2020-10-23 18:19:38,003 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:19:38,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-1.c [2020-10-23 18:19:38,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d75e340/bc365e55029f48e397a0679bc2737588/FLAG80b56474c [2020-10-23 18:19:38,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96d75e340/bc365e55029f48e397a0679bc2737588 [2020-10-23 18:19:38,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:19:38,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:19:38,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:19:38,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:19:38,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:19:38,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26fd647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38, skipping insertion in model container [2020-10-23 18:19:38,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:19:38,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:19:38,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:19:38,601 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:19:38,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:19:38,644 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:19:38,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38 WrapperNode [2020-10-23 18:19:38,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:19:38,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:19:38,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:19:38,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:19:38,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (1/1) ... [2020-10-23 18:19:38,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:19:38,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:19:38,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:19:38,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:19:38,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (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 18:19:38,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:19:38,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:19:38,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:19:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 18:19:38,874 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:19:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:19:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:19:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:19:38,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:19:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 18:19:38,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:19:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:19:38,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:19:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:19:38,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:19:38,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:19:38,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:19:39,345 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:19:39,346 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:19:39,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:19:39 BoogieIcfgContainer [2020-10-23 18:19:39,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:19:39,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:19:39,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:19:39,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:19:39,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:19:38" (1/3) ... [2020-10-23 18:19:39,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8452a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:19:39, skipping insertion in model container [2020-10-23 18:19:39,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:19:38" (2/3) ... [2020-10-23 18:19:39,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8452a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:19:39, skipping insertion in model container [2020-10-23 18:19:39,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:19:39" (3/3) ... [2020-10-23 18:19:39,360 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-10-23 18:19:39,372 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:19:39,377 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:19:39,395 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:19:39,435 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:19:39,435 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:19:39,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:19:39,436 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:19:39,436 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:19:39,436 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:19:39,436 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:19:39,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:19:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:19:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:19:39,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:39,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:39,471 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-10-23 18:19:39,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:39,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681346720] [2020-10-23 18:19:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:39,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:39,869 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 18:19:39,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681346720] [2020-10-23 18:19:39,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:19:39,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:19:39,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086890755] [2020-10-23 18:19:39,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:19:39,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:19:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:19:39,900 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:19:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:40,390 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:19:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:19:40,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:19:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:40,401 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:19:40,401 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:19:40,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:19:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:19:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:19:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:19:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:19:40,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:19:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:40,451 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:19:40,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:19:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:19:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:19:40,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:40,455 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 18:19:40,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:19:40,455 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:40,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:40,456 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-10-23 18:19:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:40,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668128084] [2020-10-23 18:19:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:40,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:40,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:40,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:40,671 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 18:19:40,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668128084] [2020-10-23 18:19:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801679500] [2020-10-23 18:19:40,672 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 18:19:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:19:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:40,883 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 18:19:40,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:40,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:19:40,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139049760] [2020-10-23 18:19:40,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:19:40,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:19:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:19:40,893 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-23 18:19:41,140 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 18:19:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:41,290 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:19:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:19:41,290 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:19:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:41,292 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:19:41,292 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:19:41,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:19:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:19:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:19:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:19:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:19:41,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:19:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:41,303 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:19:41,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:19:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:19:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:19:41,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:41,305 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 18:19:41,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:19:41,510 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-10-23 18:19:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:41,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193230870] [2020-10-23 18:19:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:41,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:41,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:41,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:41,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:41,752 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 18:19:41,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193230870] [2020-10-23 18:19:41,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484833467] [2020-10-23 18:19:41,753 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 18:19:41,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:19:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:41,896 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 18:19:41,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-23 18:19:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715354891] [2020-10-23 18:19:41,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:19:41,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:19:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:19:41,899 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-23 18:19:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:42,183 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:19:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:19:42,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-23 18:19:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:42,185 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:19:42,186 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:19:42,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:19:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:19:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:19:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:19:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:19:42,194 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:19:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:42,195 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:19:42,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:19:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:19:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:19:42,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:42,197 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 18:19:42,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:42,412 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-10-23 18:19:42,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:42,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036932937] [2020-10-23 18:19:42,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:42,660 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 18:19:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036932937] [2020-10-23 18:19:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732839041] [2020-10-23 18:19:42,661 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 18:19:42,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:19:42,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:19:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:42,780 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 18:19:42,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:42,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:19:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154725146] [2020-10-23 18:19:42,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:19:42,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:19:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:19:42,783 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-23 18:19:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:43,113 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:19:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:19:43,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-23 18:19:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:43,115 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:19:43,115 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:19:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:19:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:19:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:19:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:19:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:19:43,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:19:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:43,124 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:19:43,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:19:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:19:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:19:43,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:43,126 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 18:19:43,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:43,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:43,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-10-23 18:19:43,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:43,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542570844] [2020-10-23 18:19:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:43,582 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 18:19:43,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542570844] [2020-10-23 18:19:43,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281637102] [2020-10-23 18:19:43,583 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 18:19:43,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:43,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:43,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:19:43,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:43,699 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 18:19:43,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:43,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:19:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905533110] [2020-10-23 18:19:43,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:19:43,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:19:43,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:19:43,702 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-23 18:19:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:44,092 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:19:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:19:44,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:19:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:44,094 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:19:44,094 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:19:44,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:19:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:19:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:19:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:19:44,107 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:19:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:44,108 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:19:44,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:19:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:19:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:19:44,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:44,112 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 18:19:44,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:44,328 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-10-23 18:19:44,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:44,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049540924] [2020-10-23 18:19:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:44,615 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 18:19:44,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049540924] [2020-10-23 18:19:44,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669960595] [2020-10-23 18:19:44,616 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 18:19:44,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:19:44,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:19:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:44,762 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 18:19:44,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:44,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:19:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228970028] [2020-10-23 18:19:44,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:19:44,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:44,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:19:44,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:19:44,767 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-23 18:19:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:45,181 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:19:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:19:45,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-23 18:19:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:45,184 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:19:45,184 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:19:45,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:19:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:19:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:19:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:19:45,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:19:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:45,193 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:19:45,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:19:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:19:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:19:45,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:45,195 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 18:19:45,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:19:45,411 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-10-23 18:19:45,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:45,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439042396] [2020-10-23 18:19:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:45,649 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 18:19:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439042396] [2020-10-23 18:19:45,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606558196] [2020-10-23 18:19:45,650 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 18:19:45,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:19:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:19:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:45,831 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 18:19:45,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:45,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:19:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968731715] [2020-10-23 18:19:45,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:19:45,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:19:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:19:45,839 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-23 18:19:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:46,324 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:19:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:19:46,325 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-23 18:19:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:46,327 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:19:46,328 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:19:46,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:19:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:19:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:19:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:19:46,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:19:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:46,337 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:19:46,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:19:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:19:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:19:46,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:46,339 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 18:19:46,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:46,541 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-10-23 18:19:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:46,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937880658] [2020-10-23 18:19:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,881 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 18:19:46,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937880658] [2020-10-23 18:19:46,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005842912] [2020-10-23 18:19:46,882 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 18:19:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:19:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:47,033 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 18:19:47,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:47,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-23 18:19:47,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325138035] [2020-10-23 18:19:47,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:19:47,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:19:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:19:47,036 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-23 18:19:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:47,534 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:19:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:19:47,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-23 18:19:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:47,543 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:19:47,543 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:19:47,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:19:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:19:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:19:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:19:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:19:47,552 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:19:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:47,552 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:19:47,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:19:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:19:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:19:47,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:47,554 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 18:19:47,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:47,770 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-10-23 18:19:47,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:47,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865047263] [2020-10-23 18:19:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:47,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:48,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:48,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:48,124 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 18:19:48,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865047263] [2020-10-23 18:19:48,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064458667] [2020-10-23 18:19:48,125 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 18:19:48,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:48,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:19:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:48,261 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 18:19:48,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:48,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:19:48,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656245109] [2020-10-23 18:19:48,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:19:48,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:19:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:19:48,269 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-23 18:19:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:48,842 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:19:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:19:48,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 18:19:48,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:48,844 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:19:48,844 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:19:48,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:19:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:19:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:19:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:19:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:19:48,857 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:19:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:48,858 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:19:48,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:19:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:19:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:19:48,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:48,862 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 18:19:49,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:19:49,063 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-10-23 18:19:49,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:49,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475100076] [2020-10-23 18:19:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:49,450 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 18:19:49,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475100076] [2020-10-23 18:19:49,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762243780] [2020-10-23 18:19:49,466 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 18:19:49,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:19:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:19:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:49,633 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 18:19:49,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:49,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-10-23 18:19:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414588541] [2020-10-23 18:19:49,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:19:49,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:49,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:19:49,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:19:49,636 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2020-10-23 18:19:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:50,240 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:19:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:19:50,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-23 18:19:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:50,243 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:19:50,243 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:19:50,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:19:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:19:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:19:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:19:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:19:50,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:19:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:50,253 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:19:50,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:19:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:19:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:19:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:50,254 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 18:19:50,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:50,462 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:50,464 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-10-23 18:19:50,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:50,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551539512] [2020-10-23 18:19:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:50,922 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 18:19:50,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551539512] [2020-10-23 18:19:50,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694423387] [2020-10-23 18:19:50,924 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 18:19:50,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:50,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:19:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:51,058 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 18:19:51,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:51,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-10-23 18:19:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948623071] [2020-10-23 18:19:51,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:19:51,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:19:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:19:51,060 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2020-10-23 18:19:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:51,718 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:19:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:19:51,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-23 18:19:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:51,720 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:19:51,720 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:19:51,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:19:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:19:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:19:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:19:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:19:51,729 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:19:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:51,729 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:19:51,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:19:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:19:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:19:51,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:51,731 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 18:19:51,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:51,943 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1422056319, now seen corresponding path program 11 times [2020-10-23 18:19:51,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:51,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388122008] [2020-10-23 18:19:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:52,406 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 18:19:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388122008] [2020-10-23 18:19:52,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375071480] [2020-10-23 18:19:52,407 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 18:19:52,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:19:52,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:19:52,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:52,549 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 18:19:52,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:52,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-10-23 18:19:52,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450342882] [2020-10-23 18:19:52,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:19:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:52,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:19:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:52,551 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-10-23 18:19:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:53,257 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:19:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:19:53,257 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-23 18:19:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:53,259 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:19:53,259 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:19:53,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:19:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:19:53,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:19:53,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:19:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:19:53,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:19:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:53,279 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:19:53,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:19:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:19:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:19:53,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:53,285 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 18:19:53,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:19:53,497 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash -550588569, now seen corresponding path program 12 times [2020-10-23 18:19:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102632186] [2020-10-23 18:19:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:54,027 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 18:19:54,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102632186] [2020-10-23 18:19:54,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820618990] [2020-10-23 18:19:54,028 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 18:19:54,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:19:54,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:19:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:54,220 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 18:19:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:19:54,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836253398] [2020-10-23 18:19:54,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:19:54,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:19:54,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:19:54,223 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2020-10-23 18:19:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:54,981 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:19:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:19:54,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-23 18:19:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:54,983 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:19:54,983 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:19:54,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:19:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:19:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:19:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:19:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:19:55,004 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:19:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:55,004 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:19:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:19:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:19:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:19:55,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:55,006 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 18:19:55,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:19:55,207 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:55,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 953297599, now seen corresponding path program 13 times [2020-10-23 18:19:55,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:55,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969859197] [2020-10-23 18:19:55,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,763 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 18:19:55,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969859197] [2020-10-23 18:19:55,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221927473] [2020-10-23 18:19:55,768 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 18:19:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:19:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:55,949 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 18:19:55,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:55,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-10-23 18:19:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044608203] [2020-10-23 18:19:55,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:19:55,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:19:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:55,952 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2020-10-23 18:19:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:56,796 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:19:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:19:56,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-23 18:19:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:56,798 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:19:56,798 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:19:56,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:19:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:19:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:19:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:19:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:19:56,809 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:19:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:19:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:19:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:19:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:19:56,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:56,811 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 18:19:57,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:19:57,025 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash -929015641, now seen corresponding path program 14 times [2020-10-23 18:19:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:57,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110325306] [2020-10-23 18:19:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:57,626 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 18:19:57,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110325306] [2020-10-23 18:19:57,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450056764] [2020-10-23 18:19:57,627 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 18:19:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:57,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:19:57,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:57,781 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 18:19:57,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-10-23 18:19:57,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528636821] [2020-10-23 18:19:57,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:19:57,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:19:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:19:57,785 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-10-23 18:19:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:58,675 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:19:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:19:58,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-23 18:19:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:58,678 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:19:58,678 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:19:58,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:19:58,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:19:58,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:19:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:19:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:19:58,686 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:19:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:58,686 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:19:58,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:19:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:19:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:19:58,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:58,687 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 18:19:58,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:58,902 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash -386344449, now seen corresponding path program 15 times [2020-10-23 18:19:58,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:58,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408764744] [2020-10-23 18:19:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:58,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:58,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:59,578 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 18:19:59,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408764744] [2020-10-23 18:19:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001435230] [2020-10-23 18:19:59,580 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 18:19:59,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:19:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:19:59,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:59,773 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 18:19:59,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:59,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-10-23 18:19:59,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317820514] [2020-10-23 18:19:59,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:19:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:19:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:59,776 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2020-10-23 18:20:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:00,684 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:20:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:20:00,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-23 18:20:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:00,687 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:20:00,687 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:20:00,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 18:20:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:20:00,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:20:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:20:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:20:00,694 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:20:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:00,694 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:20:00,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:20:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:20:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:20:00,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:00,696 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 18:20:00,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:20:00,909 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 308404711, now seen corresponding path program 16 times [2020-10-23 18:20:00,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:00,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684344432] [2020-10-23 18:20:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:00,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:00,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:01,639 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 18:20:01,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684344432] [2020-10-23 18:20:01,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867340772] [2020-10-23 18:20:01,639 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 18:20:01,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:20:01,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:20:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:01,813 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 18:20:01,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:01,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-10-23 18:20:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930671875] [2020-10-23 18:20:01,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:20:01,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:20:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:20:01,819 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2020-10-23 18:20:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:02,773 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:20:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:20:02,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-23 18:20:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:02,776 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:20:02,776 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:20:02,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=580, Invalid=1142, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 18:20:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:20:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:20:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:20:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:20:02,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:20:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:02,784 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:20:02,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:20:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:20:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:20:02,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:02,785 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 18:20:02,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:20:02,999 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1022814527, now seen corresponding path program 17 times [2020-10-23 18:20:03,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:03,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971335955] [2020-10-23 18:20:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:03,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:04,007 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 18:20:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971335955] [2020-10-23 18:20:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710657100] [2020-10-23 18:20:04,008 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 18:20:04,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:20:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:20:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:04,223 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 18:20:04,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:04,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-10-23 18:20:04,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018112658] [2020-10-23 18:20:04,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:20:04,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:04,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:20:04,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:20:04,227 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2020-10-23 18:20:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:05,280 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 18:20:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:20:05,281 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-23 18:20:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:05,283 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:20:05,283 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:20:05,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:20:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:20:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:20:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:20:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 18:20:05,290 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-10-23 18:20:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:05,290 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 18:20:05,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:20:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 18:20:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 18:20:05,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:05,291 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 18:20:05,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 18:20:05,504 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1909672743, now seen corresponding path program 18 times [2020-10-23 18:20:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:05,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650356490] [2020-10-23 18:20:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:05,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:06,732 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 18:20:06,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650356490] [2020-10-23 18:20:06,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633017744] [2020-10-23 18:20:06,733 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 18:20:06,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:20:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:20:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:07,017 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 18:20:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-10-23 18:20:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580069812] [2020-10-23 18:20:07,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 18:20:07,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 18:20:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:20:07,019 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 25 states. [2020-10-23 18:20:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:08,118 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 18:20:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:20:08,119 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2020-10-23 18:20:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:08,120 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:20:08,120 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:20:08,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=703, Invalid=1367, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 18:20:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:20:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:20:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:20:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 18:20:08,127 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-10-23 18:20:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:08,127 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 18:20:08,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 18:20:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 18:20:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 18:20:08,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:08,128 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 18:20:08,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:08,335 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:08,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:08,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1351374975, now seen corresponding path program 19 times [2020-10-23 18:20:08,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:08,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289910268] [2020-10-23 18:20:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,543 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 18:20:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289910268] [2020-10-23 18:20:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642205926] [2020-10-23 18:20:09,544 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 18:20:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:20:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:09,729 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 18:20:09,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:09,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-10-23 18:20:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643322214] [2020-10-23 18:20:09,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 18:20:09,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 18:20:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:20:09,731 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-10-23 18:20:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:10,860 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 18:20:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:20:10,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-23 18:20:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:10,862 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:20:10,862 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:20:10,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=769, Invalid=1487, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 18:20:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:20:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 18:20:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 18:20:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 18:20:10,870 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-10-23 18:20:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:10,870 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 18:20:10,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 18:20:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 18:20:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 18:20:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:10,872 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 18:20:11,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:11,086 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 676631655, now seen corresponding path program 20 times [2020-10-23 18:20:11,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:11,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197081149] [2020-10-23 18:20:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:11,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-23 18:20:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197081149] [2020-10-23 18:20:12,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215249665] [2020-10-23 18:20:12,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:12,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:20:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-23 18:20:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-23 18:20:12,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:12,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-10-23 18:20:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722349266] [2020-10-23 18:20:12,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:20:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:20:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:20:12,382 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 27 states. [2020-10-23 18:20:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:13,703 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-10-23 18:20:13,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 18:20:13,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 135 [2020-10-23 18:20:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:13,705 INFO L225 Difference]: With dead ends: 85 [2020-10-23 18:20:13,705 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 18:20:13,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=838, Invalid=1612, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 18:20:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 18:20:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-23 18:20:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 18:20:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-23 18:20:13,713 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 135 [2020-10-23 18:20:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:13,715 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-23 18:20:13,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:20:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-23 18:20:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-23 18:20:13,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:13,718 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:20:13,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-23 18:20:13,931 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2089211969, now seen corresponding path program 21 times [2020-10-23 18:20:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:13,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360727001] [2020-10-23 18:20:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:14,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-23 18:20:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360727001] [2020-10-23 18:20:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360697587] [2020-10-23 18:20:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-23 18:20:15,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:15,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-23 18:20:15,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-23 18:20:15,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:15,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2020-10-23 18:20:15,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143170880] [2020-10-23 18:20:15,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 18:20:15,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 18:20:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=471, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:20:15,283 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2020-10-23 18:20:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:16,568 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-10-23 18:20:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:20:16,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 141 [2020-10-23 18:20:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:16,570 INFO L225 Difference]: With dead ends: 88 [2020-10-23 18:20:16,570 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 18:20:16,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=910, Invalid=1742, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 18:20:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 18:20:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-23 18:20:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 18:20:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-23 18:20:16,577 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 141 [2020-10-23 18:20:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:16,578 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-23 18:20:16,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 18:20:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-23 18:20:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-23 18:20:16,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:16,579 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:20:16,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-23 18:20:16,792 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash 54902183, now seen corresponding path program 22 times [2020-10-23 18:20:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:16,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889046474] [2020-10-23 18:20:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:16,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-23 18:20:17,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889046474] [2020-10-23 18:20:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511114104] [2020-10-23 18:20:17,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:18,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:20:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-23 18:20:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-23 18:20:18,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:18,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-10-23 18:20:18,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481398612] [2020-10-23 18:20:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 18:20:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 18:20:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=503, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:20:18,183 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 29 states. [2020-10-23 18:20:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:19,563 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-10-23 18:20:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 18:20:19,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 147 [2020-10-23 18:20:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:19,565 INFO L225 Difference]: With dead ends: 91 [2020-10-23 18:20:19,565 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 18:20:19,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=985, Invalid=1877, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 18:20:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 18:20:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-23 18:20:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 18:20:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-23 18:20:19,573 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 147 [2020-10-23 18:20:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:19,574 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-23 18:20:19,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 18:20:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-23 18:20:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-23 18:20:19,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:19,575 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:20:19,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:19,789 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:19,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2038257407, now seen corresponding path program 23 times [2020-10-23 18:20:19,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:19,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122998960] [2020-10-23 18:20:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:19,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:19,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:19,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:20,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-23 18:20:21,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122998960] [2020-10-23 18:20:21,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471776740] [2020-10-23 18:20:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:21,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-23 18:20:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-23 18:20:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-23 18:20:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2020-10-23 18:20:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144238709] [2020-10-23 18:20:21,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 18:20:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 18:20:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=536, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:20:21,324 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 30 states. [2020-10-23 18:20:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:22,821 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-10-23 18:20:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-23 18:20:22,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 153 [2020-10-23 18:20:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:22,823 INFO L225 Difference]: With dead ends: 94 [2020-10-23 18:20:22,823 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 18:20:22,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1063, Invalid=2017, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 18:20:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 18:20:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-23 18:20:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:20:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-23 18:20:22,830 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 153 [2020-10-23 18:20:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:22,830 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-23 18:20:22,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 18:20:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-23 18:20:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-23 18:20:22,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:22,831 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:20:23,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-23 18:20:23,046 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1543948007, now seen corresponding path program 24 times [2020-10-23 18:20:23,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:23,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132358526] [2020-10-23 18:20:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:23,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-23 18:20:24,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132358526] [2020-10-23 18:20:24,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724954925] [2020-10-23 18:20:24,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:24,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-10-23 18:20:24,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:20:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-23 18:20:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-23 18:20:24,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:24,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-10-23 18:20:24,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000495765] [2020-10-23 18:20:24,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:20:24,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:24,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:20:24,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:20:24,631 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 31 states. [2020-10-23 18:20:26,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:26,105 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-23 18:20:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 18:20:26,106 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 159 [2020-10-23 18:20:26,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:26,107 INFO L225 Difference]: With dead ends: 97 [2020-10-23 18:20:26,107 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:20:26,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1144, Invalid=2162, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:20:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:20:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-23 18:20:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:20:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-23 18:20:26,114 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 159 [2020-10-23 18:20:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:26,115 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-23 18:20:26,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:20:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-23 18:20:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 18:20:26,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:20:26,116 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:20:26,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:26,329 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:20:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:20:26,330 INFO L82 PathProgramCache]: Analyzing trace with hash 442033727, now seen corresponding path program 25 times [2020-10-23 18:20:26,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:20:26,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687365395] [2020-10-23 18:20:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:20:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:20:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:26,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:20:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:26,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:26,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:27,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:28,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:30,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:20:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 924 proven. 50 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-10-23 18:20:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687365395] [2020-10-23 18:20:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154856858] [2020-10-23 18:20:30,852 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:20:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:20:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 217 conjunts are in the unsatisfiable core [2020-10-23 18:20:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:20:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 49 proven. 950 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2020-10-23 18:20:37,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:20:37,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 115 [2020-10-23 18:20:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984661734] [2020-10-23 18:20:37,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 115 states [2020-10-23 18:20:37,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:20:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2020-10-23 18:20:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=12273, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 18:20:37,104 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 115 states. [2020-10-23 18:20:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:20:53,793 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-23 18:20:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 18:20:53,793 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 165 [2020-10-23 18:20:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:20:53,794 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:20:53,794 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:20:53,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5344 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2153, Invalid=27603, Unknown=0, NotChecked=0, Total=29756 [2020-10-23 18:20:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:20:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:20:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:20:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:20:53,800 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2020-10-23 18:20:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:20:53,800 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:20:53,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 115 states. [2020-10-23 18:20:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:20:53,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:20:54,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-23 18:20:54,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:20:54,182 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:20:54,182 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:20:54,182 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:20:54,183 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:20:54,183 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:20:54,183 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:20:54,183 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:20:54,183 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:20:54,183 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:20:54,183 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:20:54,183 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-10-23 18:20:54,184 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-10-23 18:20:54,184 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2020-10-23 18:20:54,184 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:20:54,184 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: false [2020-10-23 18:20:54,185 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-23 18:20:54,185 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-23 18:20:54,185 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= main_~b~0 0) (= main_~a~0 25)) [2020-10-23 18:20:54,186 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:20:54,186 INFO L274 CegarLoopResult]: For program point L17-2(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:20:54,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:20:54 BoogieIcfgContainer [2020-10-23 18:20:54,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:20:54,192 INFO L168 Benchmark]: Toolchain (without parser) took 75812.19 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 108.8 MB in the beginning and 613.9 MB in the end (delta: -505.1 MB). Peak memory consumption was 367.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:20:54,193 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:20:54,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.71 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:20:54,194 INFO L168 Benchmark]: Boogie Preprocessor took 58.96 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 97.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:20:54,194 INFO L168 Benchmark]: RCFGBuilder took 639.21 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 123.0 MB in the end (delta: -25.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:20:54,196 INFO L168 Benchmark]: TraceAbstraction took 74840.32 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 122.5 MB in the beginning and 613.9 MB in the end (delta: -491.4 MB). Peak memory consumption was 380.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:20:54,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.71 ms. Allocated memory is still 151.0 MB. Free memory was 108.1 MB in the beginning and 98.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.96 ms. Allocated memory is still 151.0 MB. Free memory was 98.7 MB in the beginning and 97.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 639.21 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 123.0 MB in the end (delta: -25.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 74840.32 ms. Allocated memory was 151.0 MB in the beginning and 653.3 MB in the end (delta: 502.3 MB). Free memory was 122.5 MB in the beginning and 613.9 MB in the end (delta: -491.4 MB). Peak memory consumption was 380.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 74.5s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 37.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 362 SDtfs, 2229 SDslu, 1074 SDs, 0 SdLazy, 8373 SolverSat, 1464 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3944 GetRequests, 2974 SyntacticMatches, 0 SemanticMatches, 970 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11494 ImplicationChecksByTransitivity, 41.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 36 PreInvPairs, 36 NumberOfFragments, 54 HoareAnnotationTreeSize, 36 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 132 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 4665 NumberOfCodeBlocks, 4665 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4614 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620212 SizeOfPredicates, 379 NumberOfNonLiveVariables, 8400 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17800/33800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...