/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_20x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:18:56,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:18:56,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:18:56,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:18:56,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:18:56,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:18:56,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:18:56,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:18:56,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:18:56,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:18:56,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:18:56,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:18:56,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:18:56,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:18:56,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:18:56,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:18:56,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:18:56,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:18:56,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:18:56,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:18:56,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:18:56,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:18:56,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:18:56,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:18:56,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:18:56,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:18:56,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:18:56,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:18:56,874 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 18:18:56,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:18:56,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:18:56,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:18:56,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:18:56,904 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:18:56,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:18:56,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:18:56,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:18:56,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:18:56,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:18:56,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:18:56,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:18:56,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:18:56,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:18:56,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:18:56,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:18:56,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:18:56,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:18:56,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:18:56,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:18:56,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:18:56,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:18:56,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:18:56,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:18:56,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:18:56,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:18:56,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:18:56,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:18:56,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:18:56,910 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:18:57,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:18:57,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:18:57,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:18:57,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:18:57,400 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:18:57,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-10-23 18:18:57,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a170ae21/ae2ac05650244f72bd527145ec67e883/FLAGefd6400e2 [2020-10-23 18:18:58,174 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:18:58,175 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_20x0-2.c [2020-10-23 18:18:58,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a170ae21/ae2ac05650244f72bd527145ec67e883/FLAGefd6400e2 [2020-10-23 18:18:58,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a170ae21/ae2ac05650244f72bd527145ec67e883 [2020-10-23 18:18:58,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:18:58,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:18:58,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:58,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:18:58,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:18:58,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ccf3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58, skipping insertion in model container [2020-10-23 18:18:58,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:18:58,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:18:58,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:58,734 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:18:58,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:18:58,769 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:18:58,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58 WrapperNode [2020-10-23 18:18:58,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:18:58,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:18:58,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:18:58,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:18:58,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (1/1) ... [2020-10-23 18:18:58,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:18:58,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:18:58,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:18:58,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:18:58,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (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 18:18:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:18:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:18:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:18:58,896 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-23 18:18:58,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:18:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:18:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:18:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:18:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:18:58,897 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-23 18:18:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:18:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:18:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:18:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:18:58,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:18:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:18:58,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:18:59,379 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:18:59,379 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:18:59,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:59 BoogieIcfgContainer [2020-10-23 18:18:59,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:18:59,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:18:59,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:18:59,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:18:59,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:18:58" (1/3) ... [2020-10-23 18:18:59,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7486031a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:59, skipping insertion in model container [2020-10-23 18:18:59,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:58" (2/3) ... [2020-10-23 18:18:59,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7486031a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:59, skipping insertion in model container [2020-10-23 18:18:59,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:59" (3/3) ... [2020-10-23 18:18:59,400 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-2.c [2020-10-23 18:18:59,414 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:18:59,419 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:18:59,455 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:18:59,499 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:18:59,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:18:59,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:18:59,500 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:18:59,500 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:18:59,500 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:18:59,500 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:18:59,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:18:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:18:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:18:59,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:59,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:59,538 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-10-23 18:18:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:59,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708139031] [2020-10-23 18:18:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:59,950 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 18:18:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708139031] [2020-10-23 18:18:59,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:18:59,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:18:59,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100107446] [2020-10-23 18:18:59,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:18:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:18:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:18:59,978 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:19:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:00,273 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:19:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:19:00,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:19:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:00,285 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:19:00,285 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:19:00,289 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 18:19:00,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:19:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:19:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:19:00,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:19:00,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:19:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:00,337 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:19:00,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:19:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:19:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:19:00,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:00,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:00,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:19:00,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-10-23 18:19:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:00,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607138958] [2020-10-23 18:19:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:19:00,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607138958] [2020-10-23 18:19:00,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888849276] [2020-10-23 18:19:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:19:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:19:00,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:00,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:19:00,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958472498] [2020-10-23 18:19:00,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:19:00,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:00,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:19:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:19:00,680 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-23 18:19:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:01,091 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:19:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:19:01,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:19:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:01,097 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:19:01,097 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:19:01,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:19:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:19:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:19:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:19:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:19:01,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:19:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:01,116 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:19:01,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:19:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:19:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:19:01,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:01,118 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:01,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:19:01,337 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-10-23 18:19:01,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:01,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887801571] [2020-10-23 18:19:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:19:01,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887801571] [2020-10-23 18:19:01,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656602592] [2020-10-23 18:19:01,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:01,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:01,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:19:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:19:01,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:01,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-23 18:19:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969676184] [2020-10-23 18:19:01,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:19:01,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:19:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:19:01,659 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-23 18:19:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:01,955 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:19:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:19:01,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-23 18:19:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:01,957 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:19:01,957 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:19:01,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:19:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:19:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:19:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:19:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:19:01,968 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:19:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:01,968 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:19:01,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:19:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:19:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:19:01,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:01,970 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:02,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:02,186 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-10-23 18:19:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:02,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487097313] [2020-10-23 18:19:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:19:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487097313] [2020-10-23 18:19:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496675918] [2020-10-23 18:19:02,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:02,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:19:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:19:02,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:19:02,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:02,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:19:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179257947] [2020-10-23 18:19:02,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:19:02,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:19:02,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:19:02,524 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-23 18:19:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:02,917 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:19:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:19:02,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-23 18:19:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:02,919 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:19:02,919 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:19:02,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:19:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:19:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:19:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:19:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:19:02,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:19:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:02,931 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:19:02,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:19:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:19:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:19:02,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:02,932 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:03,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:03,148 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-10-23 18:19:03,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:03,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629385084] [2020-10-23 18:19:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:19:03,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629385084] [2020-10-23 18:19:03,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407906697] [2020-10-23 18:19:03,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:03,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:03,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:19:03,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:19:03,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:03,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:19:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610817440] [2020-10-23 18:19:03,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:19:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:03,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:19:03,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:19:03,684 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-23 18:19:04,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:04,088 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:19:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:19:04,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-23 18:19:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:04,090 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:19:04,091 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:19:04,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:19:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:19:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:19:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:19:04,101 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:19:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:04,101 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:19:04,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:19:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:19:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:19:04,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:04,103 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:04,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:04,317 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-10-23 18:19:04,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847374944] [2020-10-23 18:19:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:19:04,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847374944] [2020-10-23 18:19:04,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648720997] [2020-10-23 18:19:04,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:04,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:19:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:19:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:19:04,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:04,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:19:04,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476122293] [2020-10-23 18:19:04,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:19:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:19:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:19:04,665 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-10-23 18:19:05,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:05,097 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:19:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:19:05,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-23 18:19:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:05,110 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:19:05,110 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:19:05,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:19:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:19:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:19:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:19:05,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:19:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:05,120 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:19:05,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:19:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:19:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:19:05,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:05,125 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:05,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:19:05,338 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-10-23 18:19:05,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:05,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135856956] [2020-10-23 18:19:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:19:05,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135856956] [2020-10-23 18:19:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900669839] [2020-10-23 18:19:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:05,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:19:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:05,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:19:05,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:19:05,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:05,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:19:05,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829664760] [2020-10-23 18:19:05,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:19:05,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:19:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:19:05,721 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-10-23 18:19:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:06,258 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:19:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:19:06,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-23 18:19:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:06,261 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:19:06,261 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:19:06,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:19:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:19:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:19:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:19:06,270 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:19:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:06,271 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:19:06,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:19:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:19:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:19:06,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:06,272 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:06,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:06,486 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-10-23 18:19:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:06,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043268260] [2020-10-23 18:19:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:19:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043268260] [2020-10-23 18:19:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057666571] [2020-10-23 18:19:06,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:06,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:19:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:19:06,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:06,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-23 18:19:06,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892961988] [2020-10-23 18:19:06,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:19:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:19:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:19:06,926 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-10-23 18:19:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:07,507 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:19:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:19:07,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-23 18:19:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:07,511 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:19:07,512 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:19:07,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:19:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:19:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:19:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:19:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:19:07,529 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:19:07,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:07,529 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:19:07,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:19:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:19:07,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:19:07,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:07,531 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:07,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:07,734 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-10-23 18:19:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:07,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133159914] [2020-10-23 18:19:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:07,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:19:08,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133159914] [2020-10-23 18:19:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259802252] [2020-10-23 18:19:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:08,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:19:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:19:08,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:08,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:19:08,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536934464] [2020-10-23 18:19:08,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:19:08,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:08,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:19:08,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:19:08,232 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-10-23 18:19:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:08,803 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:19:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:19:08,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-23 18:19:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:08,805 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:19:08,806 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:19:08,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:19:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:19:08,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:19:08,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:19:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:19:08,825 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:19:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:08,825 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:19:08,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:19:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:19:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:19:08,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:08,827 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:09,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:19:09,036 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:09,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-10-23 18:19:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:09,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111666579] [2020-10-23 18:19:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:19:09,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111666579] [2020-10-23 18:19:09,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517756374] [2020-10-23 18:19:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:09,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:19:09,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:19:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:19:09,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:09,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-10-23 18:19:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804836812] [2020-10-23 18:19:09,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:19:09,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:09,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:19:09,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:19:09,680 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2020-10-23 18:19:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:10,292 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:19:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:19:10,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-23 18:19:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:10,293 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:19:10,294 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:19:10,295 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 18:19:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:19:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:19:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:19:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:19:10,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:19:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:10,306 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:19:10,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:19:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:19:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:19:10,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:10,307 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:10,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:10,520 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-10-23 18:19:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:10,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542735489] [2020-10-23 18:19:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:10,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:19:11,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542735489] [2020-10-23 18:19:11,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327650198] [2020-10-23 18:19:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:11,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:11,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:19:11,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:19:11,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:11,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-10-23 18:19:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988629260] [2020-10-23 18:19:11,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:19:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:19:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:19:11,252 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2020-10-23 18:19:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:11,995 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:19:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:19:11,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-23 18:19:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:11,998 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:19:11,998 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:19:12,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:19:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:19:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:19:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:19:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:19:12,008 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:19:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:12,008 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:19:12,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:19:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:19:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:19:12,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:12,010 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:12,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:12,224 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1422056319, now seen corresponding path program 11 times [2020-10-23 18:19:12,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:12,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583307978] [2020-10-23 18:19:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:19:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583307978] [2020-10-23 18:19:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160436202] [2020-10-23 18:19:12,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:12,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:19:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:19:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:19:13,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:13,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-10-23 18:19:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416985737] [2020-10-23 18:19:13,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:19:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:13,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:19:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:19:13,040 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2020-10-23 18:19:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:13,815 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:19:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:19:13,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-23 18:19:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:13,819 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:19:13,820 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:19:13,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=667, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:19:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:19:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:19:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:19:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:19:13,835 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:19:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:13,836 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:19:13,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:19:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:19:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:19:13,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:13,837 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:14,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:19:14,052 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash -550588569, now seen corresponding path program 12 times [2020-10-23 18:19:14,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:14,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577458323] [2020-10-23 18:19:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:19:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577458323] [2020-10-23 18:19:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656545415] [2020-10-23 18:19:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:14,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:19:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:19:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:19:14,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:14,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:19:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967722093] [2020-10-23 18:19:14,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:19:14,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:19:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:19:14,815 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2020-10-23 18:19:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:15,658 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:19:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:19:15,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-23 18:19:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:15,660 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:19:15,661 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:19:15,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:19:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:19:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:19:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:19:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:19:15,670 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:19:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:15,671 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:19:15,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:19:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:19:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:19:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:15,673 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:15,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:19:15,878 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 953297599, now seen corresponding path program 13 times [2020-10-23 18:19:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:15,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24895941] [2020-10-23 18:19:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:15,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:19:16,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24895941] [2020-10-23 18:19:16,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419662254] [2020-10-23 18:19:16,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:19:16,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:19:16,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:16,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-10-23 18:19:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726219345] [2020-10-23 18:19:16,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:19:16,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:19:16,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:19:16,752 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2020-10-23 18:19:17,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:17,669 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:19:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:19:17,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-10-23 18:19:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:17,672 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:19:17,672 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:19:17,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:19:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:19:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:19:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:19:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:19:17,681 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:19:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:17,681 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:19:17,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:19:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:19:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:19:17,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:17,683 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:17,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:19:17,897 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash -929015641, now seen corresponding path program 14 times [2020-10-23 18:19:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:17,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27954626] [2020-10-23 18:19:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:19:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27954626] [2020-10-23 18:19:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869903699] [2020-10-23 18:19:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:19:18,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:19:18,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:18,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-10-23 18:19:18,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210093271] [2020-10-23 18:19:18,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:19:18,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:18,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:19:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:19:18,855 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-10-23 18:19:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:19,760 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:19:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:19:19,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-23 18:19:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:19,762 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:19:19,762 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:19:19,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:19:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:19:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:19:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:19:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:19:19,771 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:19:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:19,771 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:19:19,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:19:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:19:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:19:19,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:19,773 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:19,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:19,975 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash -386344449, now seen corresponding path program 15 times [2020-10-23 18:19:19,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:19,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055334412] [2020-10-23 18:19:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:19:20,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055334412] [2020-10-23 18:19:20,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285379327] [2020-10-23 18:19:20,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:20,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:19:20,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:19:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:19:20,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:20,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-10-23 18:19:20,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701672472] [2020-10-23 18:19:20,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:19:20,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:20,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:19:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:19:20,929 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2020-10-23 18:19:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:21,912 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:19:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:19:21,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2020-10-23 18:19:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:21,923 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:19:21,924 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:19:21,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1037, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 18:19:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:19:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:19:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:19:21,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:19:21,936 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:19:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:21,937 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:19:21,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:19:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:19:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:19:21,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:21,938 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:22,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:19:22,153 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash 308404711, now seen corresponding path program 16 times [2020-10-23 18:19:22,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:22,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451274629] [2020-10-23 18:19:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:19:22,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451274629] [2020-10-23 18:19:22,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580985926] [2020-10-23 18:19:22,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:23,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:19:23,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:23,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:19:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:19:23,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:23,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-10-23 18:19:23,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824126295] [2020-10-23 18:19:23,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:19:23,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:23,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:19:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:19:23,169 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2020-10-23 18:19:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:24,260 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:19:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:19:24,262 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2020-10-23 18:19:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:24,263 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:19:24,263 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:19:24,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=580, Invalid=1142, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 18:19:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:19:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:19:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:19:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:19:24,272 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:19:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:24,272 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:19:24,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:19:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:19:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:19:24,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:24,274 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:24,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:19:24,483 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1022814527, now seen corresponding path program 17 times [2020-10-23 18:19:24,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:24,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287403648] [2020-10-23 18:19:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:19:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287403648] [2020-10-23 18:19:25,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814337953] [2020-10-23 18:19:25,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:25,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:19:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:19:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:19:25,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:25,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-10-23 18:19:25,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897180199] [2020-10-23 18:19:25,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:19:25,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:19:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:19:25,681 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2020-10-23 18:19:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:26,869 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 18:19:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:19:26,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-23 18:19:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:26,871 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:19:26,871 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:19:26,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=640, Invalid=1252, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:19:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:19:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:19:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:19:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 18:19:26,878 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-10-23 18:19:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:26,878 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 18:19:26,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:19:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 18:19:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 18:19:26,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:26,880 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:27,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 18:19:27,093 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1909672743, now seen corresponding path program 18 times [2020-10-23 18:19:27,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:27,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126524021] [2020-10-23 18:19:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:27,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:28,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:28,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:19:28,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126524021] [2020-10-23 18:19:28,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280467693] [2020-10-23 18:19:28,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:28,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:19:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:19:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:19:28,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:28,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-10-23 18:19:28,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587173106] [2020-10-23 18:19:28,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 18:19:28,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:28,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 18:19:28,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:19:28,465 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 25 states. [2020-10-23 18:19:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:29,690 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 18:19:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:19:29,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2020-10-23 18:19:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:29,692 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:19:29,692 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:19:29,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=703, Invalid=1367, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 18:19:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:19:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:19:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:19:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 18:19:29,699 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-10-23 18:19:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:29,699 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 18:19:29,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 18:19:29,700 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 18:19:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 18:19:29,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:29,701 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:29,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:29,915 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1351374975, now seen corresponding path program 19 times [2020-10-23 18:19:29,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:29,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924205829] [2020-10-23 18:19:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:19:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924205829] [2020-10-23 18:19:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424488352] [2020-10-23 18:19:30,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:19:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:19:31,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:31,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2020-10-23 18:19:31,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790708182] [2020-10-23 18:19:31,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 18:19:31,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 18:19:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:19:31,167 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2020-10-23 18:19:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:32,442 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 18:19:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:19:32,443 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 129 [2020-10-23 18:19:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:32,445 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:19:32,445 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:19:32,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=769, Invalid=1487, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 18:19:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:19:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 18:19:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 18:19:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 18:19:32,453 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-10-23 18:19:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:32,454 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 18:19:32,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 18:19:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 18:19:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 18:19:32,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:19:32,455 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:19:32,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:32,669 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:19:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:19:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 676631655, now seen corresponding path program 20 times [2020-10-23 18:19:32,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:19:32,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947455805] [2020-10-23 18:19:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:19:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:32,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:19:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:19:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:33,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:35,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:35,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:35,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:19:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:19:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 589 proven. 40 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-23 18:19:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947455805] [2020-10-23 18:19:35,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771675624] [2020-10-23 18:19:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:19:35,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:19:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:19:35,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 177 conjunts are in the unsatisfiable core [2020-10-23 18:19:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:19:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 39 proven. 610 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2020-10-23 18:19:40,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:19:40,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 95 [2020-10-23 18:19:40,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371936134] [2020-10-23 18:19:40,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-10-23 18:19:40,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:19:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-10-23 18:19:40,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=8353, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 18:19:40,368 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 95 states. [2020-10-23 18:19:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:19:52,555 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-23 18:19:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 18:19:52,556 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 135 [2020-10-23 18:19:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:19:52,557 INFO L225 Difference]: With dead ends: 80 [2020-10-23 18:19:52,558 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:19:52,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1543, Invalid=18763, Unknown=0, NotChecked=0, Total=20306 [2020-10-23 18:19:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:19:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:19:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:19:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:19:52,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-10-23 18:19:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:19:52,565 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:19:52,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-10-23 18:19:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:19:52,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:19:52,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-23 18:19:52,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:19:52,924 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:19:52,924 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:19:52,924 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:19:52,924 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:19:52,924 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:19:52,925 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 18:19:52,925 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:19:52,925 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:19:52,925 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:19:52,926 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:19:52,926 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:19:52,926 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:19:52,926 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 18:19:52,926 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-10-23 18:19:52,926 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-10-23 18:19:52,926 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-10-23 18:19:52,926 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-10-23 18:19:52,926 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 20) the Hoare annotation is: true [2020-10-23 18:19:52,928 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:19:52,928 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: false [2020-10-23 18:19:52,928 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-23 18:19:52,928 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-23 18:19:52,928 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= main_~a~0 20) (= main_~b~0 0)) [2020-10-23 18:19:52,929 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:19:52,929 INFO L274 CegarLoopResult]: For program point L17-2(lines 13 20) no Hoare annotation was computed. [2020-10-23 18:19:52,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:19:52 BoogieIcfgContainer [2020-10-23 18:19:52,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:19:52,939 INFO L168 Benchmark]: Toolchain (without parser) took 54404.87 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 126.6 MB in the beginning and 422.4 MB in the end (delta: -295.9 MB). Peak memory consumption was 265.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:52,942 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:19:52,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:52,949 INFO L168 Benchmark]: Boogie Preprocessor took 35.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:52,950 INFO L168 Benchmark]: RCFGBuilder took 574.46 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:52,950 INFO L168 Benchmark]: TraceAbstraction took 53549.28 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 102.5 MB in the beginning and 422.4 MB in the end (delta: -319.9 MB). Peak memory consumption was 241.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:19:52,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 230.62 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.67 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 574.46 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 103.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 53549.28 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 102.5 MB in the beginning and 422.4 MB in the end (delta: -319.9 MB). Peak memory consumption was 241.7 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: 53.2s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 26.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 292 SDtfs, 1431 SDslu, 796 SDs, 0 SdLazy, 5263 SolverSat, 898 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2659 GetRequests, 1979 SyntacticMatches, 0 SemanticMatches, 680 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 29.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 31 PreInvPairs, 31 NumberOfFragments, 54 HoareAnnotationTreeSize, 31 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 132 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 3135 NumberOfCodeBlocks, 3135 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 3094 ConstructedInterpolants, 0 QuantifiedInterpolants, 920742 SizeOfPredicates, 254 NumberOfNonLiveVariables, 5820 ConjunctsInSsa, 633 ConjunctsInUnsatCore, 41 InterpolantComputations, 1 PerfectInterpolantSequences, 9390/17640 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...