/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:40:50,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:40:50,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:40:50,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 00:40:50,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 00:40:50,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 00:40:50,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 00:40:50,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 00:40:50,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 00:40:50,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 00:40:50,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 00:40:50,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 00:40:50,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:40:50,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:40:50,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:40:50,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:40:50,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:40:50,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:40:50,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:40:50,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:40:50,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:40:50,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:40:50,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:40:50,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:40:50,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 00:40:50,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 00:40:50,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 00:40:50,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 00:40:50,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 00:40:50,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 00:40:50,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 00:40:50,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 00:40:50,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 00:40:50,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 00:40:50,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 00:40:50,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 00:40:50,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 00:40:50,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 00:40:50,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:40:50,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:40:50,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:40:50,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:40:50,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:40:50,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:40:50,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:40:50,835 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:40:50,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:40:50,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:40:50,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:40:50,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:40:50,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:40:50,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:40:50,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:40:50,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:40:50,837 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:40:50,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:40:50,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:40:50,837 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:40:50,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:40:50,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:40:50,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:40:50,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:40:50,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:40:50,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:40:50,839 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:40:51,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:40:51,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:40:51,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:40:51,325 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:40:51,326 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:40:51,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-11-07 00:40:51,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a04f376/2da2bbb2d5a84514af74da69769ddf90/FLAG787460654 [2020-11-07 00:40:52,090 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:40:52,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-11-07 00:40:52,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a04f376/2da2bbb2d5a84514af74da69769ddf90/FLAG787460654 [2020-11-07 00:40:52,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a04f376/2da2bbb2d5a84514af74da69769ddf90 [2020-11-07 00:40:52,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:40:52,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:40:52,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:40:52,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:40:52,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:40:52,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e776f66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52, skipping insertion in model container [2020-11-07 00:40:52,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:40:52,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:40:52,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:40:52,665 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:40:52,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:40:52,702 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:40:52,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52 WrapperNode [2020-11-07 00:40:52,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:40:52,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:40:52,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:40:52,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:40:52,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (1/1) ... [2020-11-07 00:40:52,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:40:52,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:40:52,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:40:52,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:40:52,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (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 [2020-11-07 00:40:52,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:40:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:40:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:40:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-07 00:40:52,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:40:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:40:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:40:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:40:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:40:52,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:40:52,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:40:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:40:52,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:40:53,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:40:53,206 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:40:53,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:53 BoogieIcfgContainer [2020-11-07 00:40:53,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:40:53,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:40:53,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:40:53,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:40:53,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:40:52" (1/3) ... [2020-11-07 00:40:53,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76feb67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:53, skipping insertion in model container [2020-11-07 00:40:53,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:40:52" (2/3) ... [2020-11-07 00:40:53,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76feb67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:40:53, skipping insertion in model container [2020-11-07 00:40:53,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:40:53" (3/3) ... [2020-11-07 00:40:53,219 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-11-07 00:40:53,237 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:40:53,241 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:40:53,257 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:40:53,289 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:40:53,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:40:53,289 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:40:53,290 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:40:53,290 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:40:53,290 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:40:53,290 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:40:53,290 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:40:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-07 00:40:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-07 00:40:53,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:53,324 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 00:40:53,325 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:53,332 INFO L82 PathProgramCache]: Analyzing trace with hash -32329728, now seen corresponding path program 1 times [2020-11-07 00:40:53,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:53,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507824226] [2020-11-07 00:40:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:53,466 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:53,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:53,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:40:53,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507824226] [2020-11-07 00:40:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:53,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:40:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174029392] [2020-11-07 00:40:54,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:40:54,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:54,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:40:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:40:54,022 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2020-11-07 00:40:54,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:54,588 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-11-07 00:40:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:40:54,591 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-11-07 00:40:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:54,610 INFO L225 Difference]: With dead ends: 60 [2020-11-07 00:40:54,611 INFO L226 Difference]: Without dead ends: 37 [2020-11-07 00:40:54,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:40:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-07 00:40:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-07 00:40:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:40:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-11-07 00:40:54,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-11-07 00:40:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:54,740 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-11-07 00:40:54,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:40:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-11-07 00:40:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-07 00:40:54,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:54,743 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-07 00:40:54,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:40:54,744 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:54,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 950139466, now seen corresponding path program 1 times [2020-11-07 00:40:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:54,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229161346] [2020-11-07 00:40:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:54,749 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:54,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:40:54,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229161346] [2020-11-07 00:40:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:54,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:40:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206925656] [2020-11-07 00:40:54,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:40:54,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:40:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:40:54,913 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2020-11-07 00:40:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:55,199 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-11-07 00:40:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:40:55,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-11-07 00:40:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:55,202 INFO L225 Difference]: With dead ends: 46 [2020-11-07 00:40:55,203 INFO L226 Difference]: Without dead ends: 39 [2020-11-07 00:40:55,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 00:40:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-07 00:40:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-11-07 00:40:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-07 00:40:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-11-07 00:40:55,220 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2020-11-07 00:40:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:55,221 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-11-07 00:40:55,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:40:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-11-07 00:40:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 00:40:55,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:55,228 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2020-11-07 00:40:55,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:40:55,229 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:55,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1810718643, now seen corresponding path program 1 times [2020-11-07 00:40:55,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:55,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269614202] [2020-11-07 00:40:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:55,240 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:55,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:55,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:55,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-07 00:40:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-07 00:40:55,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269614202] [2020-11-07 00:40:55,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:55,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:40:55,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136745149] [2020-11-07 00:40:55,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:40:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:40:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:40:55,451 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2020-11-07 00:40:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:55,836 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-11-07 00:40:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 00:40:55,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 00:40:55,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:55,839 INFO L225 Difference]: With dead ends: 62 [2020-11-07 00:40:55,840 INFO L226 Difference]: Without dead ends: 39 [2020-11-07 00:40:55,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:40:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-07 00:40:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-11-07 00:40:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 00:40:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-07 00:40:55,872 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 42 [2020-11-07 00:40:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:55,873 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-07 00:40:55,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:40:55,874 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-07 00:40:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:40:55,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:55,879 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2020-11-07 00:40:55,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:40:55,879 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:55,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:55,881 INFO L82 PathProgramCache]: Analyzing trace with hash 195045207, now seen corresponding path program 1 times [2020-11-07 00:40:55,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:55,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398123232] [2020-11-07 00:40:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:55,891 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-07 00:40:56,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398123232] [2020-11-07 00:40:56,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:56,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:40:56,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916993316] [2020-11-07 00:40:56,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:40:56,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:40:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:40:56,087 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 7 states. [2020-11-07 00:40:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:56,509 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-11-07 00:40:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:40:56,510 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-11-07 00:40:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:56,514 INFO L225 Difference]: With dead ends: 66 [2020-11-07 00:40:56,514 INFO L226 Difference]: Without dead ends: 59 [2020-11-07 00:40:56,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:40:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-07 00:40:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-07 00:40:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-07 00:40:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-11-07 00:40:56,557 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 43 [2020-11-07 00:40:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:56,558 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-11-07 00:40:56,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:40:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-11-07 00:40:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-07 00:40:56,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:56,568 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 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, 1, 1] [2020-11-07 00:40:56,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:40:56,568 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash -396245802, now seen corresponding path program 2 times [2020-11-07 00:40:56,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:56,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028342600] [2020-11-07 00:40:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:56,584 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 00:40:56,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028342600] [2020-11-07 00:40:56,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:56,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:40:56,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347900793] [2020-11-07 00:40:56,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:40:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:40:56,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:40:56,826 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 8 states. [2020-11-07 00:40:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:57,330 INFO L93 Difference]: Finished difference Result 118 states and 161 transitions. [2020-11-07 00:40:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:40:57,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-11-07 00:40:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:57,343 INFO L225 Difference]: With dead ends: 118 [2020-11-07 00:40:57,343 INFO L226 Difference]: Without dead ends: 73 [2020-11-07 00:40:57,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-07 00:40:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-07 00:40:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-11-07 00:40:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-07 00:40:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-11-07 00:40:57,382 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 60 [2020-11-07 00:40:57,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:57,384 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-11-07 00:40:57,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:40:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-11-07 00:40:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 00:40:57,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:57,395 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 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, 1, 1] [2020-11-07 00:40:57,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 00:40:57,396 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -13012784, now seen corresponding path program 3 times [2020-11-07 00:40:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085625353] [2020-11-07 00:40:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:57,406 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-07 00:40:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085625353] [2020-11-07 00:40:57,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:57,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 00:40:57,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501081182] [2020-11-07 00:40:57,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 00:40:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 00:40:57,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-07 00:40:57,609 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 8 states. [2020-11-07 00:40:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:58,108 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-11-07 00:40:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 00:40:58,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-11-07 00:40:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:58,116 INFO L225 Difference]: With dead ends: 96 [2020-11-07 00:40:58,117 INFO L226 Difference]: Without dead ends: 89 [2020-11-07 00:40:58,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:40:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-07 00:40:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-11-07 00:40:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-07 00:40:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2020-11-07 00:40:58,147 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 61 [2020-11-07 00:40:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:58,147 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2020-11-07 00:40:58,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 00:40:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2020-11-07 00:40:58,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-07 00:40:58,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:58,150 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:40:58,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 00:40:58,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash 159854214, now seen corresponding path program 4 times [2020-11-07 00:40:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:58,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619499488] [2020-11-07 00:40:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:58,155 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 00:40:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 00:40:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-11-07 00:40:58,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619499488] [2020-11-07 00:40:58,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:58,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 00:40:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509101040] [2020-11-07 00:40:58,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 00:40:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 00:40:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:40:58,453 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand 9 states. [2020-11-07 00:40:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:40:59,123 INFO L93 Difference]: Finished difference Result 146 states and 199 transitions. [2020-11-07 00:40:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-07 00:40:59,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 132 [2020-11-07 00:40:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:40:59,129 INFO L225 Difference]: With dead ends: 146 [2020-11-07 00:40:59,129 INFO L226 Difference]: Without dead ends: 139 [2020-11-07 00:40:59,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-07 00:40:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-07 00:40:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2020-11-07 00:40:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-07 00:40:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 177 transitions. [2020-11-07 00:40:59,173 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 177 transitions. Word has length 132 [2020-11-07 00:40:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:40:59,174 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 177 transitions. [2020-11-07 00:40:59,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 00:40:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 177 transitions. [2020-11-07 00:40:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-11-07 00:40:59,178 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:40:59,178 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:40:59,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 00:40:59,179 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:40:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:40:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1497778840, now seen corresponding path program 5 times [2020-11-07 00:40:59,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:40:59,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758436128] [2020-11-07 00:40:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:40:59,183 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:40:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:40:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-07 00:40:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 00:40:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:40:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 00:40:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-07 00:40:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-07 00:40:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-07 00:40:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-11-07 00:40:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:40:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 70 proven. 102 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-11-07 00:40:59,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758436128] [2020-11-07 00:40:59,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:40:59,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-07 00:40:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446995323] [2020-11-07 00:40:59,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-07 00:40:59,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:40:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-07 00:40:59,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-07 00:40:59,781 INFO L87 Difference]: Start difference. First operand 127 states and 177 transitions. Second operand 14 states. [2020-11-07 00:41:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:41:01,386 INFO L93 Difference]: Finished difference Result 213 states and 326 transitions. [2020-11-07 00:41:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-07 00:41:01,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 202 [2020-11-07 00:41:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:41:01,388 INFO L225 Difference]: With dead ends: 213 [2020-11-07 00:41:01,389 INFO L226 Difference]: Without dead ends: 99 [2020-11-07 00:41:01,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=867, Unknown=0, NotChecked=0, Total=1122 [2020-11-07 00:41:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-07 00:41:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2020-11-07 00:41:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-07 00:41:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-11-07 00:41:01,428 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 202 [2020-11-07 00:41:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:41:01,429 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-11-07 00:41:01,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-07 00:41:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-11-07 00:41:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-11-07 00:41:01,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:41:01,431 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:41:01,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 00:41:01,432 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:41:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:41:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash -799639331, now seen corresponding path program 6 times [2020-11-07 00:41:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:41:01,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996525113] [2020-11-07 00:41:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:41:01,436 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:41:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:41:01,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:41:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:41:01,479 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:41:01,532 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:41:01,533 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:41:01,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 00:41:01,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:41:01 BoogieIcfgContainer [2020-11-07 00:41:01,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:41:01,572 INFO L168 Benchmark]: Toolchain (without parser) took 9111.70 ms. Allocated memory was 151.0 MB in the beginning and 226.5 MB in the end (delta: 75.5 MB). Free memory was 128.3 MB in the beginning and 106.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 97.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:01,573 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:41:01,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.43 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:01,574 INFO L168 Benchmark]: Boogie Preprocessor took 35.17 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:01,575 INFO L168 Benchmark]: RCFGBuilder took 468.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 103.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:01,576 INFO L168 Benchmark]: TraceAbstraction took 8358.99 ms. Allocated memory was 151.0 MB in the beginning and 226.5 MB in the end (delta: 75.5 MB). Free memory was 102.7 MB in the beginning and 106.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. [2020-11-07 00:41:01,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 127.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.43 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.17 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 103.2 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8358.99 ms. Allocated memory was 151.0 MB in the beginning and 226.5 MB in the end (delta: 75.5 MB). Free memory was 102.7 MB in the beginning and 106.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 72.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L26] int x = 5; [L27] CALL, EXPR fibo(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-1) [L13] CALL, EXPR fibo(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L13] RET, EXPR fibo(n-2) [L13] return fibo(n-1) + fibo(n-2); [L27] RET, EXPR fibo(x) [L27] int result = fibo(x); [L28] COND TRUE result == 5 [L29] CALL reach_error() [L4] __assert_fail("0", "fibo_5-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.2s, OverallIterations: 9, TraceHistogramMax: 21, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 306 SDtfs, 527 SDslu, 473 SDs, 0 SdLazy, 1074 SolverSat, 276 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 8 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...