/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/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:13:45,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:13:45,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:13:45,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:13:45,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:13:45,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:13:45,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:13:45,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:13:45,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:13:45,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:13:45,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:13:45,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:13:45,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:13:45,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:13:45,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:13:45,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:13:45,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:13:45,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:13:45,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:13:45,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:13:45,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:13:45,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:13:45,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:13:45,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:13:45,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:13:45,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:13:45,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:13:45,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:13:45,275 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 18:13:45,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:13:45,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:13:45,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:13:45,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:13:45,339 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:13:45,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:13:45,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:13:45,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:13:45,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:13:45,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:13:45,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:13:45,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:13:45,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:13:45,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:13:45,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:13:45,342 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:13:45,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:13:45,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:13:45,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:13:45,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:13:45,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:13:45,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:13:45,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:13:45,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:13:45,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:13:45,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:13:45,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:13:45,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:13:45,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:13:45,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:13:45,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:13:45,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:13:45,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:13:45,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:13:45,816 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:13:45,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-10-23 18:13:45,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb4e3efc/2a329be4e59a4d379b28cb2818e71e29/FLAG63669c1f5 [2020-10-23 18:13:46,536 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:13:46,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-10-23 18:13:46,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb4e3efc/2a329be4e59a4d379b28cb2818e71e29/FLAG63669c1f5 [2020-10-23 18:13:46,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efb4e3efc/2a329be4e59a4d379b28cb2818e71e29 [2020-10-23 18:13:46,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:13:46,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:13:46,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:13:46,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:13:46,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:13:46,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:13:46" (1/1) ... [2020-10-23 18:13:46,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455181b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:46, skipping insertion in model container [2020-10-23 18:13:46,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:13:46" (1/1) ... [2020-10-23 18:13:46,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:13:46,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:13:47,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:13:47,136 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:13:47,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:13:47,174 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:13:47,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47 WrapperNode [2020-10-23 18:13:47,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:13:47,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:13:47,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:13:47,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:13:47,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (1/1) ... [2020-10-23 18:13:47,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:13:47,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:13:47,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:13:47,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:13:47,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (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 18:13:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:13:47,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:13:47,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:13:47,300 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-23 18:13:47,300 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-23 18:13:47,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:13:47,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-23 18:13:47,301 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-23 18:13:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:13:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:13:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:13:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:13:47,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:13:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:13:47,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:13:47,819 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:13:47,820 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:13:47,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:13:47 BoogieIcfgContainer [2020-10-23 18:13:47,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:13:47,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:13:47,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:13:47,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:13:47,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:13:46" (1/3) ... [2020-10-23 18:13:47,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fecebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:13:47, skipping insertion in model container [2020-10-23 18:13:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:13:47" (2/3) ... [2020-10-23 18:13:47,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38fecebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:13:47, skipping insertion in model container [2020-10-23 18:13:47,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:13:47" (3/3) ... [2020-10-23 18:13:47,860 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-10-23 18:13:47,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:13:47,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:13:47,897 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:13:47,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:13:47,941 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:13:47,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:13:47,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:13:47,942 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:13:47,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:13:47,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:13:47,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:13:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-23 18:13:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:13:47,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:47,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:47,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-10-23 18:13:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345328021] [2020-10-23 18:13:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:48,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:48,448 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 18:13:48,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345328021] [2020-10-23 18:13:48,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:13:48,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:13:48,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962570571] [2020-10-23 18:13:48,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:13:48,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:13:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:13:48,474 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-23 18:13:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:48,992 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-23 18:13:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:13:48,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:13:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:49,005 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:13:49,006 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:13:49,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:13:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:13:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:13:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:13:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:13:49,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-10-23 18:13:49,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:49,069 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:13:49,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:13:49,069 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:13:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:13:49,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:49,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:49,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:13:49,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-10-23 18:13:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:49,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248933865] [2020-10-23 18:13:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,268 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 18:13:49,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248933865] [2020-10-23 18:13:49,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:13:49,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:13:49,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955679316] [2020-10-23 18:13:49,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:13:49,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:13:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:13:49,272 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-23 18:13:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:49,696 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-23 18:13:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:13:49,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:13:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:49,699 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:13:49,699 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:13:49,700 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 18:13:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:13:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:13:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:13:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:13:49,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-10-23 18:13:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:49,714 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:13:49,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:13:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:13:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:13:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:49,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:49,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:13:49,719 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-10-23 18:13:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:49,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385060851] [2020-10-23 18:13:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:13:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:13:49,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385060851] [2020-10-23 18:13:49,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430838231] [2020-10-23 18:13:49,891 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 18:13:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:13:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:13:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:13:50,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:13:50,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-23 18:13:50,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895381202] [2020-10-23 18:13:50,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:13:50,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:13:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:13:50,198 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-10-23 18:13:50,606 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-23 18:13:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:51,111 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-10-23 18:13:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:13:51,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-23 18:13:51,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:51,114 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:13:51,114 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:13:51,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:13:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:13:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-23 18:13:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:13:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-23 18:13:51,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-10-23 18:13:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:51,127 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-23 18:13:51,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:13:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-23 18:13:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:13:51,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:51,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:51,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:13:51,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-10-23 18:13:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:51,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802853887] [2020-10-23 18:13:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:13:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:13:51,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802853887] [2020-10-23 18:13:51,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195070333] [2020-10-23 18:13:51,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:13:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:13:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:13:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:13:51,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:13:51,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-10-23 18:13:51,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705600136] [2020-10-23 18:13:51,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:13:51,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:51,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:13:51,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:13:51,658 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2020-10-23 18:13:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:52,608 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-23 18:13:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:13:52,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-23 18:13:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:52,615 INFO L225 Difference]: With dead ends: 57 [2020-10-23 18:13:52,616 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 18:13:52,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:13:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 18:13:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-23 18:13:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:13:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2020-10-23 18:13:52,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 29 [2020-10-23 18:13:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:52,632 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2020-10-23 18:13:52,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:13:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2020-10-23 18:13:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:13:52,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:52,635 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:52,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:13:52,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-10-23 18:13:52,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:52,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215640923] [2020-10-23 18:13:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:52,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:52,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:52,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:52,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:53,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:13:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:53,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:13:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:13:53,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215640923] [2020-10-23 18:13:53,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032391403] [2020-10-23 18:13:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:13:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:13:53,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:13:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:13:53,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:13:53,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-10-23 18:13:53,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446029948] [2020-10-23 18:13:53,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:13:53,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:53,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:13:53,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:13:53,301 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand 12 states. [2020-10-23 18:13:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:54,694 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2020-10-23 18:13:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:13:54,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-23 18:13:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:54,698 INFO L225 Difference]: With dead ends: 111 [2020-10-23 18:13:54,698 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:13:54,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:13:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:13:54,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:13:54,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:13:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2020-10-23 18:13:54,720 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 41 [2020-10-23 18:13:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:54,720 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2020-10-23 18:13:54,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:13:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2020-10-23 18:13:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:13:54,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:54,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:54,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:13:54,939 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:54,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1960607334, now seen corresponding path program 1 times [2020-10-23 18:13:54,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:54,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469563501] [2020-10-23 18:13:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:13:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:13:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:13:55,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469563501] [2020-10-23 18:13:55,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42784184] [2020-10-23 18:13:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:13:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:13:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:13:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 18:13:55,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:13:55,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-23 18:13:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671948115] [2020-10-23 18:13:55,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:13:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:13:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:13:55,439 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand 14 states. [2020-10-23 18:13:56,448 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-23 18:13:56,620 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:13:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:13:57,626 INFO L93 Difference]: Finished difference Result 183 states and 327 transitions. [2020-10-23 18:13:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:13:57,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-23 18:13:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:13:57,632 INFO L225 Difference]: With dead ends: 183 [2020-10-23 18:13:57,632 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 18:13:57,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:13:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 18:13:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-10-23 18:13:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 18:13:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 171 transitions. [2020-10-23 18:13:57,670 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 171 transitions. Word has length 42 [2020-10-23 18:13:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:13:57,670 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 171 transitions. [2020-10-23 18:13:57,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:13:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 171 transitions. [2020-10-23 18:13:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 18:13:57,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:13:57,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:13:57,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:13:57,890 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:13:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:13:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash -751460799, now seen corresponding path program 1 times [2020-10-23 18:13:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:13:57,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284398906] [2020-10-23 18:13:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:13:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:13:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:13:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:13:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:13:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:13:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:13:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-23 18:13:58,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284398906] [2020-10-23 18:13:58,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245625985] [2020-10-23 18:13:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:13:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:13:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:13:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:13:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 18:13:58,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:13:58,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-23 18:13:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402930759] [2020-10-23 18:13:58,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:13:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:13:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:13:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:13:58,591 INFO L87 Difference]: Start difference. First operand 108 states and 171 transitions. Second operand 15 states. [2020-10-23 18:13:59,248 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:00,060 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-23 18:14:00,267 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:00,695 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-23 18:14:01,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:01,368 INFO L93 Difference]: Finished difference Result 261 states and 501 transitions. [2020-10-23 18:14:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:14:01,369 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-23 18:14:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:01,380 INFO L225 Difference]: With dead ends: 261 [2020-10-23 18:14:01,380 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 18:14:01,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:14:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 18:14:01,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2020-10-23 18:14:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-23 18:14:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 182 transitions. [2020-10-23 18:14:01,433 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 182 transitions. Word has length 56 [2020-10-23 18:14:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:01,433 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 182 transitions. [2020-10-23 18:14:01,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:14:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 182 transitions. [2020-10-23 18:14:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 18:14:01,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:01,440 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:01,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:14:01,654 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2107233529, now seen corresponding path program 1 times [2020-10-23 18:14:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:01,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998866805] [2020-10-23 18:14:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:01,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-23 18:14:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998866805] [2020-10-23 18:14:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024929410] [2020-10-23 18:14:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:14:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-23 18:14:02,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:02,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2020-10-23 18:14:02,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318933373] [2020-10-23 18:14:02,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:14:02,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:14:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:14:02,418 INFO L87 Difference]: Start difference. First operand 114 states and 182 transitions. Second operand 15 states. [2020-10-23 18:14:02,923 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:03,272 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:05,008 INFO L93 Difference]: Finished difference Result 247 states and 477 transitions. [2020-10-23 18:14:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:14:05,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-10-23 18:14:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:05,014 INFO L225 Difference]: With dead ends: 247 [2020-10-23 18:14:05,014 INFO L226 Difference]: Without dead ends: 125 [2020-10-23 18:14:05,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:14:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-23 18:14:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2020-10-23 18:14:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 18:14:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 156 transitions. [2020-10-23 18:14:05,046 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 156 transitions. Word has length 112 [2020-10-23 18:14:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:05,047 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 156 transitions. [2020-10-23 18:14:05,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:14:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 156 transitions. [2020-10-23 18:14:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-23 18:14:05,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:05,054 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:05,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:05,271 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:05,273 INFO L82 PathProgramCache]: Analyzing trace with hash -614371322, now seen corresponding path program 1 times [2020-10-23 18:14:05,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:05,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731499810] [2020-10-23 18:14:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-23 18:14:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 136 proven. 161 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-23 18:14:05,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731499810] [2020-10-23 18:14:05,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515985186] [2020-10-23 18:14:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order 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 18:14:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:06,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:14:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 82 proven. 131 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-23 18:14:06,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:06,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2020-10-23 18:14:06,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493441003] [2020-10-23 18:14:06,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:14:06,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:14:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:14:06,414 INFO L87 Difference]: Start difference. First operand 103 states and 156 transitions. Second operand 23 states. [2020-10-23 18:14:06,844 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:07,123 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:07,289 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:07,462 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:07,627 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:07,940 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-23 18:14:08,336 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-23 18:14:08,596 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:08,988 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:09,137 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:09,344 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:09,776 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:09,930 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:10,089 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-23 18:14:10,308 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:10,923 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:11,945 INFO L93 Difference]: Finished difference Result 236 states and 438 transitions. [2020-10-23 18:14:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 18:14:11,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2020-10-23 18:14:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:11,950 INFO L225 Difference]: With dead ends: 236 [2020-10-23 18:14:11,950 INFO L226 Difference]: Without dead ends: 119 [2020-10-23 18:14:11,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 18:14:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-23 18:14:11,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-10-23 18:14:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-23 18:14:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2020-10-23 18:14:11,990 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 152 [2020-10-23 18:14:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:11,990 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2020-10-23 18:14:11,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:14:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2020-10-23 18:14:11,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-23 18:14:11,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:11,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:12,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:12,209 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 605956523, now seen corresponding path program 2 times [2020-10-23 18:14:12,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:12,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844445925] [2020-10-23 18:14:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-23 18:14:12,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844445925] [2020-10-23 18:14:12,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633832597] [2020-10-23 18:14:12,605 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 18:14:12,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:14:12,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:12,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-23 18:14:12,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:12,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-10-23 18:14:12,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838201276] [2020-10-23 18:14:12,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:14:12,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:14:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:14:12,880 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand 15 states. [2020-10-23 18:14:13,192 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:14,089 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:14,674 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-23 18:14:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:14,912 INFO L93 Difference]: Finished difference Result 202 states and 289 transitions. [2020-10-23 18:14:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:14:14,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2020-10-23 18:14:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:14,917 INFO L225 Difference]: With dead ends: 202 [2020-10-23 18:14:14,917 INFO L226 Difference]: Without dead ends: 114 [2020-10-23 18:14:14,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:14:14,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-23 18:14:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-23 18:14:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-23 18:14:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2020-10-23 18:14:14,934 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 97 [2020-10-23 18:14:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:14,935 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2020-10-23 18:14:14,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:14:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2020-10-23 18:14:14,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:14:14,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:14,937 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:15,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:14:15,153 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2083902716, now seen corresponding path program 3 times [2020-10-23 18:14:15,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:15,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398691798] [2020-10-23 18:14:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-23 18:14:16,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398691798] [2020-10-23 18:14:16,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489717489] [2020-10-23 18:14:16,255 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 18:14:16,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-23 18:14:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-23 18:14:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-23 18:14:17,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:17,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 29 [2020-10-23 18:14:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865902475] [2020-10-23 18:14:17,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 18:14:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 18:14:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:14:17,287 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand 29 states. [2020-10-23 18:14:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:20,892 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2020-10-23 18:14:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:14:20,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 111 [2020-10-23 18:14:20,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:20,897 INFO L225 Difference]: With dead ends: 128 [2020-10-23 18:14:20,897 INFO L226 Difference]: Without dead ends: 123 [2020-10-23 18:14:20,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 18:14:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-23 18:14:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-23 18:14:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-23 18:14:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-10-23 18:14:20,913 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 111 [2020-10-23 18:14:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:20,913 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-10-23 18:14:20,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 18:14:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-10-23 18:14:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-23 18:14:20,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:20,916 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:21,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:21,130 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1900223229, now seen corresponding path program 4 times [2020-10-23 18:14:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:21,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845511811] [2020-10-23 18:14:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-23 18:14:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:14:21,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845511811] [2020-10-23 18:14:21,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70805851] [2020-10-23 18:14:21,500 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 18:14:21,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:14:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:14:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-10-23 18:14:21,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:21,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2020-10-23 18:14:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439626844] [2020-10-23 18:14:21,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:14:21,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:14:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:14:21,804 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 18 states. [2020-10-23 18:14:22,398 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:22,595 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:22,743 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:22,980 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:23,167 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:24,126 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:24,380 INFO L93 Difference]: Finished difference Result 238 states and 336 transitions. [2020-10-23 18:14:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:14:24,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-10-23 18:14:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:24,385 INFO L225 Difference]: With dead ends: 238 [2020-10-23 18:14:24,385 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 18:14:24,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:14:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 18:14:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2020-10-23 18:14:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-23 18:14:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2020-10-23 18:14:24,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 112 [2020-10-23 18:14:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:24,400 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2020-10-23 18:14:24,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:14:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2020-10-23 18:14:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-23 18:14:24,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:24,403 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:24,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:24,617 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash 195814027, now seen corresponding path program 1 times [2020-10-23 18:14:24,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:24,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126438285] [2020-10-23 18:14:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:14:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-23 18:14:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-23 18:14:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126438285] [2020-10-23 18:14:24,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061065512] [2020-10-23 18:14:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:14:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:14:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-23 18:14:25,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:25,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-10-23 18:14:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946525389] [2020-10-23 18:14:25,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:14:25,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:25,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:14:25,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:14:25,344 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand 17 states. [2020-10-23 18:14:25,734 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:26,744 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-23 18:14:27,259 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-23 18:14:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:27,541 INFO L93 Difference]: Finished difference Result 232 states and 321 transitions. [2020-10-23 18:14:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:14:27,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 125 [2020-10-23 18:14:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:27,544 INFO L225 Difference]: With dead ends: 232 [2020-10-23 18:14:27,544 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 18:14:27,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:14:27,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 18:14:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-23 18:14:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 18:14:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-23 18:14:27,555 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 125 [2020-10-23 18:14:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:27,555 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-23 18:14:27,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:14:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-23 18:14:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-23 18:14:27,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:27,557 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:27,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:14:27,772 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1001167155, now seen corresponding path program 5 times [2020-10-23 18:14:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526545413] [2020-10-23 18:14:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:27,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:14:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-23 18:14:28,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526545413] [2020-10-23 18:14:28,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089085787] [2020-10-23 18:14:28,260 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 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 18:14:28,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-23 18:14:28,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:14:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 126 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-10-23 18:14:28,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:28,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2020-10-23 18:14:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224721039] [2020-10-23 18:14:28,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:14:28,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:14:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:14:28,656 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 21 states. [2020-10-23 18:14:29,186 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:29,340 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-23 18:14:29,538 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:29,968 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:30,325 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-10-23 18:14:31,640 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-23 18:14:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:31,766 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-10-23 18:14:31,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 18:14:31,773 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2020-10-23 18:14:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:31,773 INFO L225 Difference]: With dead ends: 91 [2020-10-23 18:14:31,773 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:14:31,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 18:14:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:14:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:14:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:14:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:14:31,775 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2020-10-23 18:14:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:31,775 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:14:31,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:14:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:14:31,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:14:31,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:14:31,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:14:34,112 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 21 [2020-10-23 18:14:35,238 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 98 DAG size of output: 26 [2020-10-23 18:14:35,529 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 7 [2020-10-23 18:14:36,027 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 7 [2020-10-23 18:14:36,233 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-10-23 18:14:36,399 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 1 [2020-10-23 18:14:36,407 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:14:36,407 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:14:36,407 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:14:36,407 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:14:36,407 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:14:36,408 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 18:14:36,408 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:14:36,408 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:14:36,408 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:14:36,409 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:14:36,409 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:14:36,409 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2020-10-23 18:14:36,409 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:14:36,409 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 37 44) no Hoare annotation was computed. [2020-10-23 18:14:36,409 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-10-23 18:14:36,409 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:14:36,409 INFO L274 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-10-23 18:14:36,410 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-10-23 18:14:36,410 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-23 18:14:36,410 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-10-23 18:14:36,410 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-10-23 18:14:36,410 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-10-23 18:14:36,410 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (or (not (<= |fibo2_#in~n| 4)) (and (<= |fibo2_#t~ret9| 2) (<= 4 |fibo2_#in~n|) (<= 2 |fibo2_#t~ret9|)) (and (<= 3 |fibo2_#in~n|) (<= fibo2_~n 3) (<= |fibo2_#t~ret9| 1) (<= 1 |fibo2_#t~ret9|))) (= fibo2_~n |fibo2_#in~n|)) [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-10-23 18:14:36,411 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#t~ret7|) .cse0 (<= |fibo1_#t~ret7| 3)) (and .cse0 (<= |fibo1_#in~n| 4)) (and .cse0 (<= 6 |fibo1_#in~n|)))) (<= 2 |fibo1_#in~n|) (or (and (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#in~n| 2) (<= |fibo1_#t~ret7| 1)) (not (<= |fibo1_#in~n| 3)))) [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-10-23 18:14:36,411 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-10-23 18:14:36,412 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:14:36,412 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-10-23 18:14:36,412 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:14:36,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:14:36 BoogieIcfgContainer [2020-10-23 18:14:36,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:14:36,418 INFO L168 Benchmark]: Toolchain (without parser) took 49497.43 ms. Allocated memory was 151.0 MB in the beginning and 348.1 MB in the end (delta: 197.1 MB). Free memory was 126.5 MB in the beginning and 151.6 MB in the end (delta: -25.1 MB). Peak memory consumption was 202.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:36,419 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:14:36,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:36,420 INFO L168 Benchmark]: Boogie Preprocessor took 34.20 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:36,420 INFO L168 Benchmark]: RCFGBuilder took 610.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 101.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:36,421 INFO L168 Benchmark]: TraceAbstraction took 48565.88 ms. Allocated memory was 151.0 MB in the beginning and 348.1 MB in the end (delta: 197.1 MB). Free memory was 134.3 MB in the beginning and 151.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 208.9 MB. Max. memory is 8.0 GB. [2020-10-23 18:14:36,423 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 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.06 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.20 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.65 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 101.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 48565.88 ms. Allocated memory was 151.0 MB in the beginning and 348.1 MB in the end (delta: 197.1 MB). Free memory was 134.3 MB in the beginning and 151.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 208.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 44.0s, OverallIterations: 14, TraceHistogramMax: 11, AutomataDifference: 30.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 431 SDtfs, 1026 SDslu, 1391 SDs, 0 SdLazy, 6493 SolverSat, 1039 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1721 GetRequests, 1322 SyntacticMatches, 10 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 23.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=11, 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, 14 MinimizatonAttempts, 127 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 533 PreInvPairs, 718 NumberOfFragments, 137 HoareAnnotationTreeSize, 533 FomulaSimplifications, 20564 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 13 FomulaSimplificationsInter, 9974 FormulaSimplificationTreeSizeReductionInter, 3.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 2117 NumberOfCodeBlocks, 2047 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2091 ConstructedInterpolants, 0 QuantifiedInterpolants, 450479 SizeOfPredicates, 53 NumberOfNonLiveVariables, 2809 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 3460/4836 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...