/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 0.1.25-46f3038-m [2020-07-08 15:55:01,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 15:55:01,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 15:55:01,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 15:55:01,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 15:55:01,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 15:55:01,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 15:55:01,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 15:55:01,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 15:55:01,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 15:55:01,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 15:55:01,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 15:55:01,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 15:55:01,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 15:55:01,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 15:55:01,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 15:55:01,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 15:55:01,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 15:55:01,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 15:55:01,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 15:55:01,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 15:55:01,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 15:55:01,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 15:55:01,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 15:55:01,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 15:55:01,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 15:55:01,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 15:55:01,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 15:55:01,737 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-08 15:55:01,751 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 15:55:01,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 15:55:01,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 15:55:01,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 15:55:01,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 15:55:01,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 15:55:01,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 15:55:01,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 15:55:01,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 15:55:01,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 15:55:01,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 15:55:01,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 15:55:01,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 15:55:01,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 15:55:01,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 15:55:01,756 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 15:55:01,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 15:55:01,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 15:55:01,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 15:55:01,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 15:55:01,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 15:55:01,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 15:55:01,757 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 15:55:02,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 15:55:02,029 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 15:55:02,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 15:55:02,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 15:55:02,034 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 15:55:02,035 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-08 15:55:02,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bf2e33a/0f36b181570548688d2b70589d857210/FLAG80c27c4d6 [2020-07-08 15:55:02,583 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 15:55:02,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c [2020-07-08 15:55:02,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bf2e33a/0f36b181570548688d2b70589d857210/FLAG80c27c4d6 [2020-07-08 15:55:03,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49bf2e33a/0f36b181570548688d2b70589d857210 [2020-07-08 15:55:03,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 15:55:03,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 15:55:03,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:03,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 15:55:03,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 15:55:03,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779759fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03, skipping insertion in model container [2020-07-08 15:55:03,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 15:55:03,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 15:55:03,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:03,238 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 15:55:03,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 15:55:03,273 INFO L208 MainTranslator]: Completed translation [2020-07-08 15:55:03,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03 WrapperNode [2020-07-08 15:55:03,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 15:55:03,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 15:55:03,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 15:55:03,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 15:55:03,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (1/1) ... [2020-07-08 15:55:03,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 15:55:03,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 15:55:03,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 15:55:03,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 15:55:03,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (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 [2020-07-08 15:55:03,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 15:55:03,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 15:55:03,464 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-07-08 15:55:03,464 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 15:55:03,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 15:55:03,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 15:55:03,464 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-07-08 15:55:03,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 15:55:03,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 15:55:03,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 15:55:03,803 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 15:55:03,803 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-08 15:55:03,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:03 BoogieIcfgContainer [2020-07-08 15:55:03,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 15:55:03,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 15:55:03,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 15:55:03,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 15:55:03,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 03:55:03" (1/3) ... [2020-07-08 15:55:03,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf2655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:03, skipping insertion in model container [2020-07-08 15:55:03,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 03:55:03" (2/3) ... [2020-07-08 15:55:03,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf2655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 03:55:03, skipping insertion in model container [2020-07-08 15:55:03,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 03:55:03" (3/3) ... [2020-07-08 15:55:03,815 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-07-08 15:55:03,825 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 15:55:03,832 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 15:55:03,855 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 15:55:03,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 15:55:03,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 15:55:03,874 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 15:55:03,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 15:55:03,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 15:55:03,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 15:55:03,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 15:55:03,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 15:55:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-08 15:55:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-08 15:55:03,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:03,899 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] [2020-07-08 15:55:03,900 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1470222128, now seen corresponding path program 1 times [2020-07-08 15:55:03,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:03,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806034680] [2020-07-08 15:55:03,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:04,198 INFO L280 TraceCheckUtils]: 0: Hoare triple {46#true} assume true; {46#true} is VALID [2020-07-08 15:55:04,199 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {46#true} {46#true} #64#return; {46#true} is VALID [2020-07-08 15:55:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:04,305 INFO L280 TraceCheckUtils]: 0: Hoare triple {46#true} ~y1 := #in~y1; {58#(= gcd_~y1 |gcd_#in~y1|)} is VALID [2020-07-08 15:55:04,307 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 [2020-07-08 15:55:04,309 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 [2020-07-08 15:55:04,310 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 [2020-07-08 15:55:04,311 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 [2020-07-08 15:55:04,314 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 [2020-07-08 15:55:04,316 INFO L263 TraceCheckUtils]: 0: Hoare triple {46#true} call ULTIMATE.init(); {46#true} is VALID [2020-07-08 15:55:04,316 INFO L280 TraceCheckUtils]: 1: Hoare triple {46#true} assume true; {46#true} is VALID [2020-07-08 15:55:04,317 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {46#true} {46#true} #64#return; {46#true} is VALID [2020-07-08 15:55:04,317 INFO L263 TraceCheckUtils]: 3: Hoare triple {46#true} call #t~ret5 := main(); {46#true} is VALID [2020-07-08 15:55:04,318 INFO L280 TraceCheckUtils]: 4: Hoare triple {46#true} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {46#true} is VALID [2020-07-08 15:55:04,318 INFO L280 TraceCheckUtils]: 5: Hoare triple {46#true} ~m~0 := #t~nondet2; {46#true} is VALID [2020-07-08 15:55:04,319 INFO L280 TraceCheckUtils]: 6: Hoare triple {46#true} havoc #t~nondet2; {46#true} is VALID [2020-07-08 15:55:04,321 INFO L280 TraceCheckUtils]: 7: Hoare triple {46#true} assume !(~m~0 <= 0 || ~m~0 > 2147483647); {50#(<= 1 main_~m~0)} is VALID [2020-07-08 15:55:04,322 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 [2020-07-08 15:55:04,323 INFO L280 TraceCheckUtils]: 9: Hoare triple {50#(<= 1 main_~m~0)} ~n~0 := #t~nondet3; {50#(<= 1 main_~m~0)} is VALID [2020-07-08 15:55:04,325 INFO L280 TraceCheckUtils]: 10: Hoare triple {50#(<= 1 main_~m~0)} havoc #t~nondet3; {50#(<= 1 main_~m~0)} is VALID [2020-07-08 15:55:04,326 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 [2020-07-08 15:55:04,327 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 [2020-07-08 15:55:04,328 INFO L280 TraceCheckUtils]: 13: Hoare triple {46#true} ~y1 := #in~y1; {58#(= gcd_~y1 |gcd_#in~y1|)} is VALID [2020-07-08 15:55:04,329 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 [2020-07-08 15:55:04,330 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 [2020-07-08 15:55:04,331 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 [2020-07-08 15:55:04,332 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 [2020-07-08 15:55:04,335 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 [2020-07-08 15:55:04,336 INFO L280 TraceCheckUtils]: 19: Hoare triple {47#false} assume -2147483648 <= #t~ret4 && #t~ret4 <= 2147483647; {47#false} is VALID [2020-07-08 15:55:04,336 INFO L280 TraceCheckUtils]: 20: Hoare triple {47#false} ~z~0 := #t~ret4; {47#false} is VALID [2020-07-08 15:55:04,337 INFO L280 TraceCheckUtils]: 21: Hoare triple {47#false} havoc #t~ret4; {47#false} is VALID [2020-07-08 15:55:04,337 INFO L280 TraceCheckUtils]: 22: Hoare triple {47#false} assume (~z~0 < 1 && ~m~0 > 0) && ~n~0 > 0; {47#false} is VALID [2020-07-08 15:55:04,338 INFO L280 TraceCheckUtils]: 23: Hoare triple {47#false} assume !false; {47#false} is VALID [2020-07-08 15:55:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 15:55:04,342 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 15:55:04,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806034680] [2020-07-08 15:55:04,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 15:55:04,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-08 15:55:04,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841106443] [2020-07-08 15:55:04,355 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-08 15:55:04,358 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 15:55:04,362 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states. [2020-07-08 15:55:04,408 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:04,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-08 15:55:04,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 15:55:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-08 15:55:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-08 15:55:04,420 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-07-08 15:55:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:04,920 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-07-08 15:55:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-08 15:55:04,921 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-08 15:55:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 15:55:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:55:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2020-07-08 15:55:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-07-08 15:55:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2020-07-08 15:55:04,937 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 69 transitions. [2020-07-08 15:55:05,038 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 69 edges. 69 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:05,052 INFO L225 Difference]: With dead ends: 60 [2020-07-08 15:55:05,052 INFO L226 Difference]: Without dead ends: 38 [2020-07-08 15:55:05,056 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 [2020-07-08 15:55:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-08 15:55:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-08 15:55:05,151 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 15:55:05,152 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand 38 states. [2020-07-08 15:55:05,152 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 38 states. [2020-07-08 15:55:05,152 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 38 states. [2020-07-08 15:55:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:05,159 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-08 15:55:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-08 15:55:05,160 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:05,161 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:05,161 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 38 states. [2020-07-08 15:55:05,161 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 38 states. [2020-07-08 15:55:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:05,166 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-08 15:55:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-08 15:55:05,167 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:05,168 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:05,168 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 15:55:05,168 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 15:55:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-08 15:55:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-08 15:55:05,174 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2020-07-08 15:55:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 15:55:05,174 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-08 15:55:05,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-08 15:55:05,175 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 38 states and 43 transitions. [2020-07-08 15:55:05,235 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-08 15:55:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-08 15:55:05,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:05,237 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] [2020-07-08 15:55:05,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 15:55:05,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 831268307, now seen corresponding path program 1 times [2020-07-08 15:55:05,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:05,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566365874] [2020-07-08 15:55:05,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:05,297 INFO L280 TraceCheckUtils]: 0: Hoare triple {337#true} assume true; {337#true} is VALID [2020-07-08 15:55:05,298 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {337#true} {337#true} #64#return; {337#true} is VALID [2020-07-08 15:55:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 15:55:05,339 INFO L280 TraceCheckUtils]: 0: Hoare triple {337#true} ~y1 := #in~y1; {337#true} is VALID [2020-07-08 15:55:05,340 INFO L280 TraceCheckUtils]: 1: Hoare triple {337#true} ~y2 := #in~y2; {337#true} is VALID [2020-07-08 15:55:05,341 INFO L280 TraceCheckUtils]: 2: Hoare triple {337#true} assume !(~y1 <= 0 || ~y2 <= 0); {350#(<= 1 gcd_~y1)} is VALID [2020-07-08 15:55:05,342 INFO L280 TraceCheckUtils]: 3: Hoare triple {350#(<= 1 gcd_~y1)} assume ~y1 == ~y2; {350#(<= 1 gcd_~y1)} is VALID [2020-07-08 15:55:05,342 INFO L280 TraceCheckUtils]: 4: Hoare triple {350#(<= 1 gcd_~y1)} #res := ~y1; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-08 15:55:05,343 INFO L280 TraceCheckUtils]: 5: Hoare triple {351#(<= 1 |gcd_#res|)} assume true; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-08 15:55:05,344 INFO L275 TraceCheckUtils]: 6: Hoare quadruple {351#(<= 1 |gcd_#res|)} {337#true} #68#return; {348#(<= 1 |main_#t~ret4|)} is VALID [2020-07-08 15:55:05,345 INFO L263 TraceCheckUtils]: 0: Hoare triple {337#true} call ULTIMATE.init(); {337#true} is VALID [2020-07-08 15:55:05,345 INFO L280 TraceCheckUtils]: 1: Hoare triple {337#true} assume true; {337#true} is VALID [2020-07-08 15:55:05,346 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {337#true} {337#true} #64#return; {337#true} is VALID [2020-07-08 15:55:05,346 INFO L263 TraceCheckUtils]: 3: Hoare triple {337#true} call #t~ret5 := main(); {337#true} is VALID [2020-07-08 15:55:05,346 INFO L280 TraceCheckUtils]: 4: Hoare triple {337#true} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {337#true} is VALID [2020-07-08 15:55:05,347 INFO L280 TraceCheckUtils]: 5: Hoare triple {337#true} ~m~0 := #t~nondet2; {337#true} is VALID [2020-07-08 15:55:05,347 INFO L280 TraceCheckUtils]: 6: Hoare triple {337#true} havoc #t~nondet2; {337#true} is VALID [2020-07-08 15:55:05,347 INFO L280 TraceCheckUtils]: 7: Hoare triple {337#true} assume !(~m~0 <= 0 || ~m~0 > 2147483647); {337#true} is VALID [2020-07-08 15:55:05,347 INFO L280 TraceCheckUtils]: 8: Hoare triple {337#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {337#true} is VALID [2020-07-08 15:55:05,348 INFO L280 TraceCheckUtils]: 9: Hoare triple {337#true} ~n~0 := #t~nondet3; {337#true} is VALID [2020-07-08 15:55:05,348 INFO L280 TraceCheckUtils]: 10: Hoare triple {337#true} havoc #t~nondet3; {337#true} is VALID [2020-07-08 15:55:05,348 INFO L280 TraceCheckUtils]: 11: Hoare triple {337#true} assume !(~n~0 <= 0 || ~n~0 > 2147483647); {337#true} is VALID [2020-07-08 15:55:05,349 INFO L263 TraceCheckUtils]: 12: Hoare triple {337#true} call #t~ret4 := gcd(~m~0, ~n~0); {337#true} is VALID [2020-07-08 15:55:05,349 INFO L280 TraceCheckUtils]: 13: Hoare triple {337#true} ~y1 := #in~y1; {337#true} is VALID [2020-07-08 15:55:05,349 INFO L280 TraceCheckUtils]: 14: Hoare triple {337#true} ~y2 := #in~y2; {337#true} is VALID [2020-07-08 15:55:05,350 INFO L280 TraceCheckUtils]: 15: Hoare triple {337#true} assume !(~y1 <= 0 || ~y2 <= 0); {350#(<= 1 gcd_~y1)} is VALID [2020-07-08 15:55:05,351 INFO L280 TraceCheckUtils]: 16: Hoare triple {350#(<= 1 gcd_~y1)} assume ~y1 == ~y2; {350#(<= 1 gcd_~y1)} is VALID [2020-07-08 15:55:05,352 INFO L280 TraceCheckUtils]: 17: Hoare triple {350#(<= 1 gcd_~y1)} #res := ~y1; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-08 15:55:05,353 INFO L280 TraceCheckUtils]: 18: Hoare triple {351#(<= 1 |gcd_#res|)} assume true; {351#(<= 1 |gcd_#res|)} is VALID [2020-07-08 15:55:05,354 INFO L275 TraceCheckUtils]: 19: Hoare quadruple {351#(<= 1 |gcd_#res|)} {337#true} #68#return; {348#(<= 1 |main_#t~ret4|)} is VALID [2020-07-08 15:55:05,355 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 [2020-07-08 15:55:05,355 INFO L280 TraceCheckUtils]: 21: Hoare triple {348#(<= 1 |main_#t~ret4|)} ~z~0 := #t~ret4; {349#(<= 1 main_~z~0)} is VALID [2020-07-08 15:55:05,356 INFO L280 TraceCheckUtils]: 22: Hoare triple {349#(<= 1 main_~z~0)} havoc #t~ret4; {349#(<= 1 main_~z~0)} is VALID [2020-07-08 15:55:05,357 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 [2020-07-08 15:55:05,357 INFO L280 TraceCheckUtils]: 24: Hoare triple {338#false} assume !false; {338#false} is VALID [2020-07-08 15:55:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 15:55:05,359 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 15:55:05,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566365874] [2020-07-08 15:55:05,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 15:55:05,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-08 15:55:05,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462859045] [2020-07-08 15:55:05,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-08 15:55:05,361 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 15:55:05,361 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-08 15:55:05,391 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 25 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:05,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-08 15:55:05,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 15:55:05,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-08 15:55:05,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-08 15:55:05,393 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-07-08 15:55:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:05,726 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-07-08 15:55:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-08 15:55:05,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-08 15:55:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 15:55:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-08 15:55:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2020-07-08 15:55:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-08 15:55:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 52 transitions. [2020-07-08 15:55:05,733 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 52 transitions. [2020-07-08 15:55:05,801 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:05,803 INFO L225 Difference]: With dead ends: 46 [2020-07-08 15:55:05,803 INFO L226 Difference]: Without dead ends: 40 [2020-07-08 15:55:05,805 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 [2020-07-08 15:55:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-08 15:55:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-07-08 15:55:05,862 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 15:55:05,862 INFO L82 GeneralOperation]: Start isEquivalent. First operand 40 states. Second operand 38 states. [2020-07-08 15:55:05,863 INFO L74 IsIncluded]: Start isIncluded. First operand 40 states. Second operand 38 states. [2020-07-08 15:55:05,863 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 38 states. [2020-07-08 15:55:05,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:05,867 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-08 15:55:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-08 15:55:05,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:05,868 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:05,868 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 40 states. [2020-07-08 15:55:05,869 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 40 states. [2020-07-08 15:55:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 15:55:05,872 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-08 15:55:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-08 15:55:05,873 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 15:55:05,874 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 15:55:05,874 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 15:55:05,874 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 15:55:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-08 15:55:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-08 15:55:05,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2020-07-08 15:55:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 15:55:05,877 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-08 15:55:05,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-08 15:55:05,877 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 38 states and 43 transitions. [2020-07-08 15:55:05,937 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 15:55:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-08 15:55:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-08 15:55:05,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 15:55:05,939 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] [2020-07-08 15:55:05,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 15:55:05,939 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 15:55:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 15:55:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -852904039, now seen corresponding path program 1 times [2020-07-08 15:55:05,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 15:55:05,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721039911] [2020-07-08 15:55:05,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 15:55:05,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-08 15:55:05,967 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) [2020-07-08 15:55:05,973 INFO L168 Benchmark]: Toolchain (without parser) took 2953.59 ms. Allocated memory was 146.3 MB in the beginning and 244.3 MB in the end (delta: 98.0 MB). Free memory was 104.4 MB in the beginning and 161.2 MB in the end (delta: -56.9 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,974 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.94 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 94.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,976 INFO L168 Benchmark]: Boogie Preprocessor took 123.37 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 94.2 MB in the beginning and 181.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,977 INFO L168 Benchmark]: RCFGBuilder took 409.96 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 158.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,978 INFO L168 Benchmark]: TraceAbstraction took 2161.23 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 158.1 MB in the beginning and 161.2 MB in the end (delta: -3.1 MB). Peak memory consumption was 38.3 MB. Max. memory is 7.1 GB. [2020-07-08 15:55:05,982 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 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.94 ms. Allocated memory is still 146.3 MB. Free memory was 104.1 MB in the beginning and 94.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.37 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 94.2 MB in the beginning and 181.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.96 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 158.1 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2161.23 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 158.1 MB in the beginning and 161.2 MB in the end (delta: -3.1 MB). Peak memory consumption was 38.3 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...