/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/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 18:36:17,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 18:36:17,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 18:36:17,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 18:36:17,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 18:36:17,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 18:36:17,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 18:36:17,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 18:36:17,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 18:36:17,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 18:36:17,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 18:36:17,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 18:36:17,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 18:36:17,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 18:36:17,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 18:36:17,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 18:36:17,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 18:36:17,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 18:36:17,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 18:36:17,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 18:36:17,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 18:36:17,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 18:36:17,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 18:36:17,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 18:36:17,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-10 18:36:17,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 18:36:17,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 18:36:17,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 18:36:17,459 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 18:36:17,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 18:36:17,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 18:36:17,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 18:36:17,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 18:36:17,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 18:36:17,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 18:36:17,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 18:36:17,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 18:36:17,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 18:36:17,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 18:36:17,476 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-10 18:36:17,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 18:36:17,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 18:36:17,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 18:36:17,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 18:36:17,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-10 18:36:17,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 18:36:17,479 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-10 18:36:17,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 18:36:17,795 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 18:36:17,799 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 18:36:17,800 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 18:36:17,801 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 18:36:17,801 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-10 18:36:17,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a2a037c/3d3dbb0a3acf49819bba35829440450d/FLAGba4791e28 [2020-07-10 18:36:18,311 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 18:36:18,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-10 18:36:18,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a2a037c/3d3dbb0a3acf49819bba35829440450d/FLAGba4791e28 [2020-07-10 18:36:18,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a2a037c/3d3dbb0a3acf49819bba35829440450d [2020-07-10 18:36:18,676 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 18:36:18,678 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 18:36:18,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:18,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 18:36:18,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 18:36:18,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36ba5ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18, skipping insertion in model container [2020-07-10 18:36:18,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 18:36:18,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 18:36:18,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:18,917 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 18:36:18,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 18:36:18,952 INFO L208 MainTranslator]: Completed translation [2020-07-10 18:36:18,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18 WrapperNode [2020-07-10 18:36:18,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 18:36:18,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 18:36:18,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 18:36:18,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 18:36:18,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (1/1) ... [2020-07-10 18:36:18,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 18:36:18,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 18:36:18,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 18:36:18,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 18:36:18,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (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 18:36:19,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 18:36:19,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 18:36:19,144 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-10 18:36:19,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 18:36:19,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 18:36:19,544 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 18:36:19,545 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-10 18:36:19,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:19 BoogieIcfgContainer [2020-07-10 18:36:19,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 18:36:19,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 18:36:19,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 18:36:19,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 18:36:19,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 06:36:18" (1/3) ... [2020-07-10 18:36:19,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd3dd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:19, skipping insertion in model container [2020-07-10 18:36:19,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 06:36:18" (2/3) ... [2020-07-10 18:36:19,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd3dd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 06:36:19, skipping insertion in model container [2020-07-10 18:36:19,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 06:36:19" (3/3) ... [2020-07-10 18:36:19,557 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-10 18:36:19,568 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-10 18:36:19,576 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 18:36:19,591 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 18:36:19,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 18:36:19,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 18:36:19,613 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-10 18:36:19,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 18:36:19,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 18:36:19,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 18:36:19,614 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 18:36:19,614 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 18:36:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-10 18:36:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-10 18:36:19,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:19,643 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] [2020-07-10 18:36:19,643 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-07-10 18:36:19,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:19,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740961843] [2020-07-10 18:36:19,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:36:19,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:19,893 INFO L280 TraceCheckUtils]: 0: Hoare triple {46#true} assume true; {46#true} is VALID [2020-07-10 18:36:19,894 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {46#true} {46#true} #64#return; {46#true} is VALID [2020-07-10 18:36:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:20,011 INFO L280 TraceCheckUtils]: 0: Hoare triple {46#true} ~y1 := #in~y1; {58#(= gcd_~y1 |gcd_#in~y1|)} is VALID [2020-07-10 18:36:20,013 INFO L280 TraceCheckUtils]: 1: Hoare triple {58#(= gcd_~y1 |gcd_#in~y1|)} ~y2 := #in~y2; {59#(and (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|))} is VALID [2020-07-10 18:36:20,014 INFO L280 TraceCheckUtils]: 2: Hoare triple {59#(and (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|))} assume ~y1 <= 0 || ~y2 <= 0; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,015 INFO L280 TraceCheckUtils]: 3: Hoare triple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} #res := 0; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,016 INFO L280 TraceCheckUtils]: 4: Hoare triple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} assume true; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,019 INFO L275 TraceCheckUtils]: 5: Hoare quadruple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} {51#(and (<= 1 main_~m~0) (<= 1 main_~n~0))} #68#return; {47#false} is VALID [2020-07-10 18:36:20,021 INFO L263 TraceCheckUtils]: 0: Hoare triple {46#true} call ULTIMATE.init(); {46#true} is VALID [2020-07-10 18:36:20,021 INFO L280 TraceCheckUtils]: 1: Hoare triple {46#true} assume true; {46#true} is VALID [2020-07-10 18:36:20,022 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {46#true} {46#true} #64#return; {46#true} is VALID [2020-07-10 18:36:20,022 INFO L263 TraceCheckUtils]: 3: Hoare triple {46#true} call #t~ret5 := main(); {46#true} is VALID [2020-07-10 18:36:20,023 INFO L280 TraceCheckUtils]: 4: Hoare triple {46#true} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {46#true} is VALID [2020-07-10 18:36:20,023 INFO L280 TraceCheckUtils]: 5: Hoare triple {46#true} ~m~0 := #t~nondet2; {46#true} is VALID [2020-07-10 18:36:20,023 INFO L280 TraceCheckUtils]: 6: Hoare triple {46#true} havoc #t~nondet2; {46#true} is VALID [2020-07-10 18:36:20,025 INFO L280 TraceCheckUtils]: 7: Hoare triple {46#true} assume !(~m~0 <= 0 || ~m~0 > 2147483647); {50#(<= 1 main_~m~0)} is VALID [2020-07-10 18:36:20,026 INFO L280 TraceCheckUtils]: 8: Hoare triple {50#(<= 1 main_~m~0)} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {50#(<= 1 main_~m~0)} is VALID [2020-07-10 18:36:20,027 INFO L280 TraceCheckUtils]: 9: Hoare triple {50#(<= 1 main_~m~0)} ~n~0 := #t~nondet3; {50#(<= 1 main_~m~0)} is VALID [2020-07-10 18:36:20,029 INFO L280 TraceCheckUtils]: 10: Hoare triple {50#(<= 1 main_~m~0)} havoc #t~nondet3; {50#(<= 1 main_~m~0)} is VALID [2020-07-10 18:36:20,030 INFO L280 TraceCheckUtils]: 11: Hoare triple {50#(<= 1 main_~m~0)} assume !(~n~0 <= 0 || ~n~0 > 2147483647); {51#(and (<= 1 main_~m~0) (<= 1 main_~n~0))} is VALID [2020-07-10 18:36:20,031 INFO L263 TraceCheckUtils]: 12: Hoare triple {51#(and (<= 1 main_~m~0) (<= 1 main_~n~0))} call #t~ret4 := gcd(~m~0, ~n~0); {46#true} is VALID [2020-07-10 18:36:20,031 INFO L280 TraceCheckUtils]: 13: Hoare triple {46#true} ~y1 := #in~y1; {58#(= gcd_~y1 |gcd_#in~y1|)} is VALID [2020-07-10 18:36:20,033 INFO L280 TraceCheckUtils]: 14: Hoare triple {58#(= gcd_~y1 |gcd_#in~y1|)} ~y2 := #in~y2; {59#(and (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|))} is VALID [2020-07-10 18:36:20,034 INFO L280 TraceCheckUtils]: 15: Hoare triple {59#(and (= gcd_~y1 |gcd_#in~y1|) (= gcd_~y2 |gcd_#in~y2|))} assume ~y1 <= 0 || ~y2 <= 0; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,035 INFO L280 TraceCheckUtils]: 16: Hoare triple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} #res := 0; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,036 INFO L280 TraceCheckUtils]: 17: Hoare triple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} assume true; {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} is VALID [2020-07-10 18:36:20,038 INFO L275 TraceCheckUtils]: 18: Hoare quadruple {60#(or (<= |gcd_#in~y2| 0) (<= |gcd_#in~y1| 0))} {51#(and (<= 1 main_~m~0) (<= 1 main_~n~0))} #68#return; {47#false} is VALID [2020-07-10 18:36:20,039 INFO L280 TraceCheckUtils]: 19: Hoare triple {47#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {47#false} is VALID [2020-07-10 18:36:20,039 INFO L280 TraceCheckUtils]: 20: Hoare triple {47#false} ~z~0 := #t~ret4; {47#false} is VALID [2020-07-10 18:36:20,040 INFO L280 TraceCheckUtils]: 21: Hoare triple {47#false} havoc #t~ret4; {47#false} is VALID [2020-07-10 18:36:20,040 INFO L280 TraceCheckUtils]: 22: Hoare triple {47#false} assume (~z~0 < 1 && ~m~0 > 0) && ~n~0 > 0; {47#false} is VALID [2020-07-10 18:36:20,041 INFO L280 TraceCheckUtils]: 23: Hoare triple {47#false} assume !false; {47#false} is VALID [2020-07-10 18:36:20,045 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 18:36:20,045 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:36:20,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740961843] [2020-07-10 18:36:20,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:36:20,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-10 18:36:20,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158804883] [2020-07-10 18:36:20,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-10 18:36:20,061 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:36:20,065 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2020-07-10 18:36:20,112 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 18:36:20,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-10 18:36:20,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:36:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-10 18:36:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-10 18:36:20,126 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-07-10 18:36:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:20,721 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-07-10 18:36:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-10 18:36:20,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-10 18:36:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:36:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-10 18:36:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2020-07-10 18:36:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-10 18:36:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2020-07-10 18:36:20,760 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 69 transitions. [2020-07-10 18:36:20,855 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 69 edges. 69 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:20,871 INFO L225 Difference]: With dead ends: 60 [2020-07-10 18:36:20,871 INFO L226 Difference]: Without dead ends: 38 [2020-07-10 18:36:20,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-10 18:36:20,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-10 18:36:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-10 18:36:20,976 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:36:20,976 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand 38 states. [2020-07-10 18:36:20,977 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 38 states. [2020-07-10 18:36:20,977 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 38 states. [2020-07-10 18:36:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:20,984 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-10 18:36:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-10 18:36:20,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:20,986 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:20,986 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 38 states. [2020-07-10 18:36:20,987 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 38 states. [2020-07-10 18:36:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:20,992 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-10 18:36:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-10 18:36:20,994 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:20,994 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:20,994 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:36:20,995 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:36:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-10 18:36:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-10 18:36:21,002 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-07-10 18:36:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:36:21,002 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-10 18:36:21,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-10 18:36:21,003 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 38 states and 43 transitions. [2020-07-10 18:36:21,067 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-10 18:36:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-10 18:36:21,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:21,071 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] [2020-07-10 18:36:21,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 18:36:21,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:21,072 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-07-10 18:36:21,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:21,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56324709] [2020-07-10 18:36:21,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:36:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:21,154 INFO L280 TraceCheckUtils]: 0: Hoare triple {337#true} assume true; {337#true} is VALID [2020-07-10 18:36:21,155 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {337#true} {337#true} #64#return; {337#true} is VALID [2020-07-10 18:36:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 18:36:21,194 INFO L280 TraceCheckUtils]: 0: Hoare triple {337#true} ~y1 := #in~y1; {337#true} is VALID [2020-07-10 18:36:21,195 INFO L280 TraceCheckUtils]: 1: Hoare triple {337#true} ~y2 := #in~y2; {337#true} is VALID [2020-07-10 18:36:21,196 INFO L280 TraceCheckUtils]: 2: Hoare triple {337#true} assume !(~y1 <= 0 || ~y2 <= 0); {350#(<= 1 gcd_~y1)} is VALID [2020-07-10 18:36:21,197 INFO L280 TraceCheckUtils]: 3: Hoare triple {350#(<= 1 gcd_~y1)} assume ~y1 == ~y2; {350#(<= 1 gcd_~y1)} is VALID [2020-07-10 18:36:21,198 INFO L280 TraceCheckUtils]: 4: Hoare triple {350#(<= 1 gcd_~y1)} #res := ~y1; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-10 18:36:21,199 INFO L280 TraceCheckUtils]: 5: Hoare triple {351#(<= 1 |gcd_#res|)} assume true; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-10 18:36:21,200 INFO L275 TraceCheckUtils]: 6: Hoare quadruple {351#(<= 1 |gcd_#res|)} {337#true} #68#return; {348#(<= 1 |main_#t~ret4|)} is VALID [2020-07-10 18:36:21,201 INFO L263 TraceCheckUtils]: 0: Hoare triple {337#true} call ULTIMATE.init(); {337#true} is VALID [2020-07-10 18:36:21,201 INFO L280 TraceCheckUtils]: 1: Hoare triple {337#true} assume true; {337#true} is VALID [2020-07-10 18:36:21,202 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {337#true} {337#true} #64#return; {337#true} is VALID [2020-07-10 18:36:21,202 INFO L263 TraceCheckUtils]: 3: Hoare triple {337#true} call #t~ret5 := main(); {337#true} is VALID [2020-07-10 18:36:21,202 INFO L280 TraceCheckUtils]: 4: Hoare triple {337#true} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {337#true} is VALID [2020-07-10 18:36:21,203 INFO L280 TraceCheckUtils]: 5: Hoare triple {337#true} ~m~0 := #t~nondet2; {337#true} is VALID [2020-07-10 18:36:21,203 INFO L280 TraceCheckUtils]: 6: Hoare triple {337#true} havoc #t~nondet2; {337#true} is VALID [2020-07-10 18:36:21,203 INFO L280 TraceCheckUtils]: 7: Hoare triple {337#true} assume !(~m~0 <= 0 || ~m~0 > 2147483647); {337#true} is VALID [2020-07-10 18:36:21,204 INFO L280 TraceCheckUtils]: 8: Hoare triple {337#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {337#true} is VALID [2020-07-10 18:36:21,204 INFO L280 TraceCheckUtils]: 9: Hoare triple {337#true} ~n~0 := #t~nondet3; {337#true} is VALID [2020-07-10 18:36:21,204 INFO L280 TraceCheckUtils]: 10: Hoare triple {337#true} havoc #t~nondet3; {337#true} is VALID [2020-07-10 18:36:21,205 INFO L280 TraceCheckUtils]: 11: Hoare triple {337#true} assume !(~n~0 <= 0 || ~n~0 > 2147483647); {337#true} is VALID [2020-07-10 18:36:21,205 INFO L263 TraceCheckUtils]: 12: Hoare triple {337#true} call #t~ret4 := gcd(~m~0, ~n~0); {337#true} is VALID [2020-07-10 18:36:21,205 INFO L280 TraceCheckUtils]: 13: Hoare triple {337#true} ~y1 := #in~y1; {337#true} is VALID [2020-07-10 18:36:21,206 INFO L280 TraceCheckUtils]: 14: Hoare triple {337#true} ~y2 := #in~y2; {337#true} is VALID [2020-07-10 18:36:21,207 INFO L280 TraceCheckUtils]: 15: Hoare triple {337#true} assume !(~y1 <= 0 || ~y2 <= 0); {350#(<= 1 gcd_~y1)} is VALID [2020-07-10 18:36:21,208 INFO L280 TraceCheckUtils]: 16: Hoare triple {350#(<= 1 gcd_~y1)} assume ~y1 == ~y2; {350#(<= 1 gcd_~y1)} is VALID [2020-07-10 18:36:21,209 INFO L280 TraceCheckUtils]: 17: Hoare triple {350#(<= 1 gcd_~y1)} #res := ~y1; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-10 18:36:21,210 INFO L280 TraceCheckUtils]: 18: Hoare triple {351#(<= 1 |gcd_#res|)} assume true; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-10 18:36:21,211 INFO L275 TraceCheckUtils]: 19: Hoare quadruple {351#(<= 1 |gcd_#res|)} {337#true} #68#return; {348#(<= 1 |main_#t~ret4|)} is VALID [2020-07-10 18:36:21,212 INFO L280 TraceCheckUtils]: 20: Hoare triple {348#(<= 1 |main_#t~ret4|)} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {348#(<= 1 |main_#t~ret4|)} is VALID [2020-07-10 18:36:21,213 INFO L280 TraceCheckUtils]: 21: Hoare triple {348#(<= 1 |main_#t~ret4|)} ~z~0 := #t~ret4; {349#(<= 1 main_~z~0)} is VALID [2020-07-10 18:36:21,213 INFO L280 TraceCheckUtils]: 22: Hoare triple {349#(<= 1 main_~z~0)} havoc #t~ret4; {349#(<= 1 main_~z~0)} is VALID [2020-07-10 18:36:21,214 INFO L280 TraceCheckUtils]: 23: Hoare triple {349#(<= 1 main_~z~0)} assume (~z~0 < 1 && ~m~0 > 0) && ~n~0 > 0; {338#false} is VALID [2020-07-10 18:36:21,215 INFO L280 TraceCheckUtils]: 24: Hoare triple {338#false} assume !false; {338#false} is VALID [2020-07-10 18:36:21,216 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 18:36:21,216 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-10 18:36:21,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56324709] [2020-07-10 18:36:21,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 18:36:21,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-10 18:36:21,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135360904] [2020-07-10 18:36:21,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-10 18:36:21,219 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 18:36:21,219 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-10 18:36:21,248 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 25 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:21,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-10 18:36:21,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-10 18:36:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-10 18:36:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-10 18:36:21,250 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-07-10 18:36:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:21,621 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-07-10 18:36:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-10 18:36:21,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-10 18:36:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 18:36:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 18:36:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2020-07-10 18:36:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 18:36:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2020-07-10 18:36:21,629 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 52 transitions. [2020-07-10 18:36:21,691 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:21,694 INFO L225 Difference]: With dead ends: 46 [2020-07-10 18:36:21,694 INFO L226 Difference]: Without dead ends: 40 [2020-07-10 18:36:21,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-10 18:36:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-10 18:36:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-10 18:36:21,763 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 18:36:21,763 INFO L82 GeneralOperation]: Start isEquivalent. First operand 40 states. Second operand 38 states. [2020-07-10 18:36:21,763 INFO L74 IsIncluded]: Start isIncluded. First operand 40 states. Second operand 38 states. [2020-07-10 18:36:21,763 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 38 states. [2020-07-10 18:36:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:21,768 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-10 18:36:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-10 18:36:21,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:21,769 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:21,770 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 40 states. [2020-07-10 18:36:21,770 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 40 states. [2020-07-10 18:36:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 18:36:21,774 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-10 18:36:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-10 18:36:21,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 18:36:21,776 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 18:36:21,776 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 18:36:21,776 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 18:36:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-10 18:36:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-10 18:36:21,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-07-10 18:36:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 18:36:21,785 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-10 18:36:21,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-10 18:36:21,786 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 38 states and 43 transitions. [2020-07-10 18:36:21,849 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 18:36:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-10 18:36:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-10 18:36:21,851 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 18:36:21,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 18:36:21,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 18:36:21,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 18:36:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 18:36:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-07-10 18:36:21,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-10 18:36:21,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248302128] [2020-07-10 18:36:21,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 18:36:21,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-10 18:36:21,879 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-10 18:36:21,886 INFO L168 Benchmark]: Toolchain (without parser) took 3207.66 ms. Allocated memory was 144.7 MB in the beginning and 246.9 MB in the end (delta: 102.2 MB). Free memory was 103.2 MB in the beginning and 170.6 MB in the end (delta: -67.4 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,887 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.32 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,888 INFO L168 Benchmark]: Boogie Preprocessor took 33.32 ms. Allocated memory is still 144.7 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,889 INFO L168 Benchmark]: RCFGBuilder took 562.02 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 91.6 MB in the beginning and 159.1 MB in the end (delta: -67.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,891 INFO L168 Benchmark]: TraceAbstraction took 2332.13 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 159.1 MB in the beginning and 170.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. [2020-07-10 18:36:21,895 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.32 ms. Allocated memory is still 144.7 MB. Free memory was 102.8 MB in the beginning and 93.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.32 ms. Allocated memory is still 144.7 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 562.02 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 91.6 MB in the beginning and 159.1 MB in the end (delta: -67.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2332.13 ms. Allocated memory was 202.9 MB in the beginning and 246.9 MB in the end (delta: 44.0 MB). Free memory was 159.1 MB in the beginning and 170.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 32.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...