/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:41:35,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:41:35,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:41:35,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-10 18:41:35,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:41:35,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:41:35,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:41:35,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:41:35,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:41:35,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:41:35,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:41:35,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:41:35,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:41:35,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:41:35,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:41:35,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:41:35,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 18:41:35,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:41:35,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:41:35,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:41:35,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-10 18:41:35,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:41:35,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:41:35,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:41:35,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:41:35,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:41:35,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:41:35,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:41:35,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:41:35,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:41:35,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:41:35,678 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:41:35,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:41:35,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:41:35,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:41:35,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:41:35,680 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:41:35,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:41:35,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:41:35,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:41:35,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:41:35,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:41:35,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:41:35,681 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:41:35,983 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:41:35,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:41:36,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:41:36,004 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:41:36,005 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:41:36,005 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-07-10 18:41:36,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00ef735c/c2627e71759f4a91b229e092e5676eac/FLAG3a38337e0 [2020-07-10 18:41:36,583 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:41:36,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-07-10 18:41:36,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00ef735c/c2627e71759f4a91b229e092e5676eac/FLAG3a38337e0 [2020-07-10 18:41:36,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00ef735c/c2627e71759f4a91b229e092e5676eac [2020-07-10 18:41:36,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:41:36,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:41:36,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:41:36,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:41:36,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:41:36,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:41:36" (1/1) ... [2020-07-10 18:41:36,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d70271c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:36, skipping insertion in model container [2020-07-10 18:41:36,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:41:36" (1/1) ... [2020-07-10 18:41:36,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:41:37,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:41:37,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:41:37,216 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:41:37,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:41:37,253 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:41:37,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37 WrapperNode [2020-07-10 18:41:37,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:41:37,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:41:37,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:41:37,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:41:37,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (1/1) ... [2020-07-10 18:41:37,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:41:37,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:41:37,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:41:37,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:41:37,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (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 [2020-07-10 18:41:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:41:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:41:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-10 18:41:37,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:41:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:41:37,682 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:41:37,683 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:41:37,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:41:37 BoogieIcfgContainer [2020-07-10 18:41:37,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:41:37,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:41:37,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:41:37,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:41:37,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:41:36" (1/3) ... [2020-07-10 18:41:37,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396503eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:41:37, skipping insertion in model container [2020-07-10 18:41:37,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:41:37" (2/3) ... [2020-07-10 18:41:37,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396503eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:41:37, skipping insertion in model container [2020-07-10 18:41:37,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:41:37" (3/3) ... [2020-07-10 18:41:37,695 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-07-10 18:41:37,706 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:41:37,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:41:37,725 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:41:37,744 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:41:37,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:41:37,745 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:41:37,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:41:37,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:41:37,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:41:37,745 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:41:37,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:41:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-10 18:41:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 18:41:37,777 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:41:37,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:41:37,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:41:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:41:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-10 18:41:37,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:41:37,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799647717] [2020-07-10 18:41:37,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:41:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:41:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:41:38,006 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-10 18:41:38,007 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-10 18:41:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:41:38,063 INFO L280 TraceCheckUtils]: 0: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-10 18:41:38,065 INFO L280 TraceCheckUtils]: 1: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,067 INFO L280 TraceCheckUtils]: 2: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,069 INFO L280 TraceCheckUtils]: 3: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,073 INFO L275 TraceCheckUtils]: 4: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 5 main_~input~0)} #35#return; {29#false} is VALID [2020-07-10 18:41:38,074 INFO L263 TraceCheckUtils]: 0: Hoare triple {28#true} call ULTIMATE.init(); {28#true} is VALID [2020-07-10 18:41:38,075 INFO L280 TraceCheckUtils]: 1: Hoare triple {28#true} assume true; {28#true} is VALID [2020-07-10 18:41:38,075 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {28#true} {28#true} #31#return; {28#true} is VALID [2020-07-10 18:41:38,076 INFO L263 TraceCheckUtils]: 3: Hoare triple {28#true} call #t~ret2 := main(); {28#true} is VALID [2020-07-10 18:41:38,077 INFO L280 TraceCheckUtils]: 4: Hoare triple {28#true} ~input~0 := 5; {32#(<= 5 main_~input~0)} is VALID [2020-07-10 18:41:38,078 INFO L263 TraceCheckUtils]: 5: Hoare triple {32#(<= 5 main_~input~0)} call #t~ret1 := id(~input~0); {28#true} is VALID [2020-07-10 18:41:38,080 INFO L280 TraceCheckUtils]: 6: Hoare triple {28#true} ~x := #in~x; {38#(= |id_#in~x| id_~x)} is VALID [2020-07-10 18:41:38,082 INFO L280 TraceCheckUtils]: 7: Hoare triple {38#(= |id_#in~x| id_~x)} assume 0 == ~x; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,084 INFO L280 TraceCheckUtils]: 8: Hoare triple {39#(= 0 |id_#in~x|)} #res := 0; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,086 INFO L280 TraceCheckUtils]: 9: Hoare triple {39#(= 0 |id_#in~x|)} assume true; {39#(= 0 |id_#in~x|)} is VALID [2020-07-10 18:41:38,091 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {39#(= 0 |id_#in~x|)} {32#(<= 5 main_~input~0)} #35#return; {29#false} is VALID [2020-07-10 18:41:38,092 INFO L280 TraceCheckUtils]: 11: Hoare triple {29#false} assume -2147483648 <= #t~ret1 && #t~ret1 <= 2147483647; {29#false} is VALID [2020-07-10 18:41:38,093 INFO L280 TraceCheckUtils]: 12: Hoare triple {29#false} ~result~0 := #t~ret1; {29#false} is VALID [2020-07-10 18:41:38,093 INFO L280 TraceCheckUtils]: 13: Hoare triple {29#false} havoc #t~ret1; {29#false} is VALID [2020-07-10 18:41:38,094 INFO L280 TraceCheckUtils]: 14: Hoare triple {29#false} assume 5 == ~result~0; {29#false} is VALID [2020-07-10 18:41:38,097 INFO L280 TraceCheckUtils]: 15: Hoare triple {29#false} assume !false; {29#false} is VALID [2020-07-10 18:41:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 18:41:38,108 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:41:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799647717] [2020-07-10 18:41:38,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:41:38,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-10 18:41:38,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387765297] [2020-07-10 18:41:38,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:41:38,140 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:41:38,144 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-10 18:41:38,214 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:41:38,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-10 18:41:38,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:41:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-10 18:41:38,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-10 18:41:38,228 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-10 18:41:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:41:38,509 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-10 18:41:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-10 18:41:38,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-10 18:41:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:41:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:41:38,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-10 18:41:38,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-10 18:41:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2020-07-10 18:41:38,525 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 40 transitions. [2020-07-10 18:41:38,597 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:41:38,609 INFO L225 Difference]: With dead ends: 37 [2020-07-10 18:41:38,610 INFO L226 Difference]: Without dead ends: 23 [2020-07-10 18:41:38,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-10 18:41:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-10 18:41:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-10 18:41:38,689 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:41:38,690 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand 23 states. [2020-07-10 18:41:38,690 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 18:41:38,690 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 18:41:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:41:38,696 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-10 18:41:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:41:38,697 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:41:38,698 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:41:38,698 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 18:41:38,698 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 18:41:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:41:38,703 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-10 18:41:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:41:38,704 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:41:38,704 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:41:38,704 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:41:38,704 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:41:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-10 18:41:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-10 18:41:38,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-10 18:41:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:41:38,710 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-10 18:41:38,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-10 18:41:38,711 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 23 states and 24 transitions. [2020-07-10 18:41:38,755 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:41:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-10 18:41:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-10 18:41:38,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:41:38,758 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] [2020-07-10 18:41:38,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:41:38,758 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:41:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:41:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-10 18:41:38,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:41:38,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398330496] [2020-07-10 18:41:38,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY