/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_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:17:52,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:17:52,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:17:52,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:17:52,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:17:52,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:17:52,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:17:52,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:17:52,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:17:52,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:17:52,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:17:52,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:17:52,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:17:52,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:17:52,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:17:52,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:17:52,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:17:52,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:17:52,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:17:52,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:17:52,671 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:17:52,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:17:52,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:17:52,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:17:52,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:17:52,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:17:52,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:17:52,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:17:52,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:17:52,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:17:52,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:17:52,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:17:52,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:17:52,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:17:52,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:17:52,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:17:52,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:17:52,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:17:52,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:17:52,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:17:52,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:17:52,705 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 18:17:52,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:17:52,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:17:52,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:17:52,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:17:52,773 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:17:52,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:17:52,773 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:17:52,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:17:52,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:17:52,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:17:52,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:17:52,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:17:52,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:17:52,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:17:52,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:17:52,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:17:52,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:17:52,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:17:52,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:17:52,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:17:52,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:17:52,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:17:52,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:17:52,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:17:52,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:17:52,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:17:52,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:17:52,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:17:52,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:17:52,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:17:53,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:17:53,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:17:53,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:17:53,301 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:17:53,302 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:17:53,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-10-23 18:17:53,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5ba0640/5a5eae70a5664e689e8984a0b415e7d5/FLAG7618f5750 [2020-10-23 18:17:53,977 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:17:53,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-1.c [2020-10-23 18:17:53,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5ba0640/5a5eae70a5664e689e8984a0b415e7d5/FLAG7618f5750 [2020-10-23 18:17:54,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5ba0640/5a5eae70a5664e689e8984a0b415e7d5 [2020-10-23 18:17:54,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:17:54,405 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:17:54,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:17:54,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:17:54,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:17:54,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296912aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54, skipping insertion in model container [2020-10-23 18:17:54,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:17:54,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:17:54,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:17:54,699 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:17:54,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:17:54,735 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:17:54,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54 WrapperNode [2020-10-23 18:17:54,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:17:54,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:17:54,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:17:54,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:17:54,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (1/1) ... [2020-10-23 18:17:54,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:17:54,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:17:54,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:17:54,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:17:54,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (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 18:17:54,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:17:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:17:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:17:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 18:17:54,865 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:17:54,865 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:17:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:17:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:17:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:17:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 18:17:54,866 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:17:54,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:17:55,108 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:17:55,109 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:17:55,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:17:55 BoogieIcfgContainer [2020-10-23 18:17:55,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:17:55,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:17:55,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:17:55,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:17:55,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:17:54" (1/3) ... [2020-10-23 18:17:55,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ce40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:17:55, skipping insertion in model container [2020-10-23 18:17:55,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:54" (2/3) ... [2020-10-23 18:17:55,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ce40f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:17:55, skipping insertion in model container [2020-10-23 18:17:55,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:17:55" (3/3) ... [2020-10-23 18:17:55,125 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-10-23 18:17:55,140 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:17:55,145 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:17:55,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:17:55,254 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:17:55,255 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:17:55,255 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:17:55,256 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:17:55,259 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:17:55,259 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:17:55,260 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:17:55,260 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:17:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:17:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:17:55,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:55,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:55,307 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-10-23 18:17:55,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:55,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773280850] [2020-10-23 18:17:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:55,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:55,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:55,771 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 18:17:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773280850] [2020-10-23 18:17:55,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:17:55,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:17:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726340403] [2020-10-23 18:17:55,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:17:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:17:55,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:17:55,812 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:17:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:56,204 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:17:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:17:56,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:17:56,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:56,224 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:17:56,224 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:17:56,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:17:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:17:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:17:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:17:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:17:56,302 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:17:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:56,303 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:17:56,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:17:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:17:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:17:56,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:56,306 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 18:17:56,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:17:56,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-10-23 18:17:56,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:56,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080969061] [2020-10-23 18:17:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,525 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 18:17:56,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080969061] [2020-10-23 18:17:56,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531962913] [2020-10-23 18:17:56,526 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 18:17:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:17:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:56,716 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 18:17:56,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:56,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:17:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812047977] [2020-10-23 18:17:56,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:17:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:56,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:17:56,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:17:56,722 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-23 18:17:56,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:56,941 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:17:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:17:56,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:17:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:56,943 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:17:56,943 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:17:56,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:17:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:17:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:17:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:17:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:17:56,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:17:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:56,954 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:17:56,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:17:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:17:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:17:56,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:56,956 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 18:17:57,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:17:57,171 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-10-23 18:17:57,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:57,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195896851] [2020-10-23 18:17:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,375 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 18:17:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195896851] [2020-10-23 18:17:57,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157893155] [2020-10-23 18:17:57,377 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 18:17:57,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:17:57,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:17:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:57,508 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 18:17:57,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:57,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-23 18:17:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640518757] [2020-10-23 18:17:57,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:17:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:17:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:17:57,512 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-23 18:17:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:57,778 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:17:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:17:57,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-23 18:17:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:57,780 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:17:57,780 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:17:57,781 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 18:17:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:17:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:17:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:17:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:17:57,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:17:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:57,790 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:17:57,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:17:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:17:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:17:57,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:57,792 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 18:17:58,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:58,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:58,010 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-10-23 18:17:58,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:58,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071331869] [2020-10-23 18:17:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,207 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 18:17:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071331869] [2020-10-23 18:17:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605144942] [2020-10-23 18:17:58,209 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 18:17:58,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:17:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:58,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:17:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:58,361 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 18:17:58,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:58,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:17:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429793084] [2020-10-23 18:17:58,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:17:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:17:58,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:17:58,365 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-23 18:17:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:58,696 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:17:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:17:58,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-23 18:17:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:58,698 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:17:58,698 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:17:58,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:17:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:17:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:17:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:17:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:17:58,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:17:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:58,707 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:17:58,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:17:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:17:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:17:58,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:58,709 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 18:17:58,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:58,923 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-10-23 18:17:58,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:58,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073441221] [2020-10-23 18:17:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,125 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 18:17:59,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073441221] [2020-10-23 18:17:59,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90756925] [2020-10-23 18:17:59,127 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 18:17:59,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:17:59,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:17:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:59,259 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 18:17:59,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:59,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:17:59,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099975632] [2020-10-23 18:17:59,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:17:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:17:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:17:59,263 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-23 18:17:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:59,651 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:17:59,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:17:59,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:17:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:59,653 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:17:59,653 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:17:59,654 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 18:17:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:17:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:17:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:17:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:17:59,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:17:59,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:59,662 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:17:59,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:17:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:17:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:17:59,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:59,664 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 18:17:59,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:59,880 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-10-23 18:17:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:59,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490564963] [2020-10-23 18:17:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,103 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 18:18:00,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490564963] [2020-10-23 18:18:00,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867932902] [2020-10-23 18:18:00,104 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 18:18:00,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:18:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:18:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:00,251 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 18:18:00,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:00,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:18:00,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338727254] [2020-10-23 18:18:00,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:18:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:00,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:18:00,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:18:00,254 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-23 18:18:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:00,681 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:18:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:18:00,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-23 18:18:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:00,683 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:18:00,684 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:18:00,685 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 18:18:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:18:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:18:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:18:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:18:00,692 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:18:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:00,693 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:18:00,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:18:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:18:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:18:00,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:00,694 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 18:18:00,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:18:00,908 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-10-23 18:18:00,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:00,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272875309] [2020-10-23 18:18:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:00,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,179 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 18:18:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272875309] [2020-10-23 18:18:01,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928794] [2020-10-23 18:18:01,180 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 18:18:01,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:18:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:01,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:18:01,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:01,325 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 18:18:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:01,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:18:01,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870943138] [2020-10-23 18:18:01,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:18:01,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:18:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:18:01,335 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-23 18:18:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:01,947 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:18:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:18:01,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-23 18:18:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:01,950 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:18:01,950 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:18:01,951 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 18:18:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:18:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:18:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:18:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:18:01,959 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:18:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:01,959 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:18:01,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:18:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:18:01,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:18:01,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:01,963 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 18:18:02,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:02,168 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:02,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-10-23 18:18:02,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:02,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239010890] [2020-10-23 18:18:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,585 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 18:18:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239010890] [2020-10-23 18:18:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122226655] [2020-10-23 18:18:02,587 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 18:18:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:18:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:02,775 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 18:18:02,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:02,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-23 18:18:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109944347] [2020-10-23 18:18:02,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:18:02,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:02,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:18:02,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:18:02,779 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-23 18:18:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:03,414 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:18:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:18:03,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-23 18:18:03,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:03,419 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:18:03,419 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:18:03,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:18:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:18:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:18:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:18:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:18:03,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:18:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:03,441 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:18:03,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:18:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:18:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:18:03,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:03,443 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 18:18:03,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:03,660 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-10-23 18:18:03,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:03,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887800402] [2020-10-23 18:18:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,059 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 18:18:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887800402] [2020-10-23 18:18:04,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405354946] [2020-10-23 18:18:04,060 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 18:18:04,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:04,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:04,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:18:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:04,219 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 18:18:04,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:04,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:18:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535373831] [2020-10-23 18:18:04,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:18:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:18:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:18:04,222 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-23 18:18:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:04,880 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:18:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:18:04,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 18:18:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:04,884 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:18:04,885 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:18:04,886 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 18:18:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:18:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:18:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:18:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:18:04,894 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:18:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:04,894 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:18:04,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:18:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:18:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:18:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:04,895 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 18:18:05,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:18:05,107 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:05,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-10-23 18:18:05,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:05,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11827179] [2020-10-23 18:18:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,541 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 18:18:05,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11827179] [2020-10-23 18:18:05,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292684730] [2020-10-23 18:18:05,543 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 18:18:05,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:18:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:05,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:18:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:05,770 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 18:18:05,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:05,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-10-23 18:18:05,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133354715] [2020-10-23 18:18:05,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:18:05,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:18:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:18:05,775 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2020-10-23 18:18:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:06,451 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:18:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:18:06,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-23 18:18:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:06,454 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:18:06,454 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:18:06,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=512, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:18:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:18:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:18:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:18:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:18:06,464 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:18:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:06,465 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:18:06,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:18:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:18:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:18:06,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:06,466 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 18:18:06,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:06,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:06,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:06,683 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-10-23 18:18:06,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:06,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063518801] [2020-10-23 18:18:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:06,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:06,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:06,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-23 18:18:07,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063518801] [2020-10-23 18:18:07,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358442223] [2020-10-23 18:18:07,864 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 18:18:07,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:18:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 97 conjunts are in the unsatisfiable core [2020-10-23 18:18:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-23 18:18:09,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:09,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2020-10-23 18:18:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280297295] [2020-10-23 18:18:09,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-23 18:18:09,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-23 18:18:09,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 18:18:09,442 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 55 states. [2020-10-23 18:18:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:14,646 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-23 18:18:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 18:18:14,647 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 75 [2020-10-23 18:18:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:14,647 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:18:14,648 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:18:14,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=623, Invalid=6183, Unknown=0, NotChecked=0, Total=6806 [2020-10-23 18:18:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:18:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:18:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:18:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:18:14,654 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2020-10-23 18:18:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:14,654 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:18:14,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-23 18:18:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:18:14,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:18:14,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:14,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:18:14,998 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:18:14,998 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:18:14,998 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:18:14,999 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:18:14,999 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:18:14,999 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 18:18:14,999 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:18:14,999 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:18:14,999 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:18:14,999 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:18:14,999 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:18:14,999 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:18:15,000 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 18:18:15,000 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-10-23 18:18:15,000 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-10-23 18:18:15,000 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:18:15,000 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-10-23 18:18:15,000 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2020-10-23 18:18:15,000 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:18:15,000 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: false [2020-10-23 18:18:15,000 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-23 18:18:15,000 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-23 18:18:15,001 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= main_~a~0 10) (= main_~b~0 0)) [2020-10-23 18:18:15,001 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:18:15,001 INFO L274 CegarLoopResult]: For program point L17-2(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:18:15,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:18:15 BoogieIcfgContainer [2020-10-23 18:18:15,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:18:15,008 INFO L168 Benchmark]: Toolchain (without parser) took 20608.59 ms. Allocated memory was 125.8 MB in the beginning and 327.2 MB in the end (delta: 201.3 MB). Free memory was 101.0 MB in the beginning and 207.6 MB in the end (delta: -106.7 MB). Peak memory consumption was 96.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:15,009 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:18:15,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.01 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 91.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:15,010 INFO L168 Benchmark]: Boogie Preprocessor took 34.10 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:15,011 INFO L168 Benchmark]: RCFGBuilder took 337.94 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 77.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:15,011 INFO L168 Benchmark]: TraceAbstraction took 19892.96 ms. Allocated memory was 125.8 MB in the beginning and 327.2 MB in the end (delta: 201.3 MB). Free memory was 77.2 MB in the beginning and 207.6 MB in the end (delta: -130.4 MB). Peak memory consumption was 72.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:18:15,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 85.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.01 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 91.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.10 ms. Allocated memory is still 125.8 MB. Free memory was 91.3 MB in the beginning and 89.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 337.94 ms. Allocated memory is still 125.8 MB. Free memory was 89.9 MB in the beginning and 77.5 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19892.96 ms. Allocated memory was 125.8 MB in the beginning and 327.2 MB in the end (delta: 201.3 MB). Free memory was 77.2 MB in the beginning and 207.6 MB in the end (delta: -130.4 MB). Peak memory consumption was 72.1 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: 19.6s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 453 SDslu, 444 SDs, 0 SdLazy, 2100 SolverSat, 351 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 839 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 54 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 132 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 975 NumberOfCodeBlocks, 969 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 954 ConstructedInterpolants, 0 QuantifiedInterpolants, 181502 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1961 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 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...