/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/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:48:12,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:48:12,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:48:12,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:48:12,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:48:12,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:48:12,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:48:12,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:48:12,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:48:12,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:48:12,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:48:12,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:48:12,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:48:12,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:48:12,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:48:12,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:48:12,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:48:12,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:48:12,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:48:12,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:48:12,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:48:12,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:48:12,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:48:12,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:48:12,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:48:12,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:48:12,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:48:12,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:48:12,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 00:48:12,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:48:12,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:48:12,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:48:12,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:48:12,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:48:12,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:48:12,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:48:12,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:48:12,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:48:12,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:48:12,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:48:12,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:48:12,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:48:12,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:48:12,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:48:12,163 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:48:12,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:48:12,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:48:12,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:48:12,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:48:12,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:48:12,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:48:12,164 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:48:12,423 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:48:12,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:48:12,440 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:48:12,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:48:12,442 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:48:12,442 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-18 00:48:12,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bac22036/1598a46e23a7470eb466a3942801120b/FLAGaa8058967 [2020-07-18 00:48:12,984 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:48:12,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-18 00:48:12,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bac22036/1598a46e23a7470eb466a3942801120b/FLAGaa8058967 [2020-07-18 00:48:13,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bac22036/1598a46e23a7470eb466a3942801120b [2020-07-18 00:48:13,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:48:13,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:48:13,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:48:13,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:48:13,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:48:13,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f89536c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13, skipping insertion in model container [2020-07-18 00:48:13,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:48:13,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:48:13,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:48:13,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:48:13,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:48:13,607 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:48:13,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13 WrapperNode [2020-07-18 00:48:13,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:48:13,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:48:13,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:48:13,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:48:13,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (1/1) ... [2020-07-18 00:48:13,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:48:13,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:48:13,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:48:13,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:48:13,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (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 [2020-07-18 00:48:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:48:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:48:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 00:48:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-18 00:48:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:48:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:48:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 00:48:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-18 00:48:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:48:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:48:13,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:48:13,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:48:13,987 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-18 00:48:13,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:48:13 BoogieIcfgContainer [2020-07-18 00:48:13,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:48:13,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:48:13,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:48:14,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:48:14,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:48:13" (1/3) ... [2020-07-18 00:48:14,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1b435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:48:14, skipping insertion in model container [2020-07-18 00:48:14,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:48:13" (2/3) ... [2020-07-18 00:48:14,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b1b435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:48:14, skipping insertion in model container [2020-07-18 00:48:14,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:48:13" (3/3) ... [2020-07-18 00:48:14,006 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-07-18 00:48:14,017 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:48:14,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:48:14,045 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:48:14,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:48:14,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:48:14,073 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:48:14,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:48:14,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:48:14,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:48:14,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:48:14,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:48:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-18 00:48:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-18 00:48:14,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:48:14,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:48:14,119 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:48:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:48:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-07-18 00:48:14,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:48:14,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275525967] [2020-07-18 00:48:14,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:48:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:48:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:48:14,337 INFO L280 TraceCheckUtils]: 0: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-18 00:48:14,338 INFO L280 TraceCheckUtils]: 1: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-18 00:48:14,338 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {27#true} {27#true} #46#return; {27#true} is VALID [2020-07-18 00:48:14,344 INFO L263 TraceCheckUtils]: 0: Hoare triple {27#true} call ULTIMATE.init(); {32#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-18 00:48:14,345 INFO L280 TraceCheckUtils]: 1: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-18 00:48:14,345 INFO L280 TraceCheckUtils]: 2: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-18 00:48:14,345 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {27#true} {27#true} #46#return; {27#true} is VALID [2020-07-18 00:48:14,346 INFO L263 TraceCheckUtils]: 4: Hoare triple {27#true} call #t~ret0 := main(); {27#true} is VALID [2020-07-18 00:48:14,350 INFO L280 TraceCheckUtils]: 5: Hoare triple {27#true} assume false; {28#false} is VALID [2020-07-18 00:48:14,351 INFO L263 TraceCheckUtils]: 6: Hoare triple {28#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {28#false} is VALID [2020-07-18 00:48:14,351 INFO L280 TraceCheckUtils]: 7: Hoare triple {28#false} ~cond := #in~cond; {28#false} is VALID [2020-07-18 00:48:14,352 INFO L280 TraceCheckUtils]: 8: Hoare triple {28#false} assume 0 == ~cond; {28#false} is VALID [2020-07-18 00:48:14,352 INFO L280 TraceCheckUtils]: 9: Hoare triple {28#false} assume !false; {28#false} is VALID [2020-07-18 00:48:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 00:48:14,358 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:48:14,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275525967] [2020-07-18 00:48:14,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:48:14,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-18 00:48:14,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564682270] [2020-07-18 00:48:14,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-18 00:48:14,379 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:48:14,383 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-18 00:48:14,443 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:14,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-18 00:48:14,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 00:48:14,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-18 00:48:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-18 00:48:14,458 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-07-18 00:48:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:14,626 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-07-18 00:48:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-18 00:48:14,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-18 00:48:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 00:48:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-18 00:48:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2020-07-18 00:48:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-18 00:48:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2020-07-18 00:48:14,644 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 55 transitions. [2020-07-18 00:48:14,743 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:14,755 INFO L225 Difference]: With dead ends: 39 [2020-07-18 00:48:14,755 INFO L226 Difference]: Without dead ends: 20 [2020-07-18 00:48:14,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-18 00:48:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-18 00:48:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-07-18 00:48:14,819 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 00:48:14,820 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand 18 states. [2020-07-18 00:48:14,821 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 18 states. [2020-07-18 00:48:14,821 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 18 states. [2020-07-18 00:48:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:14,827 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-07-18 00:48:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-18 00:48:14,828 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:48:14,828 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:48:14,828 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 20 states. [2020-07-18 00:48:14,828 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 20 states. [2020-07-18 00:48:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:48:14,832 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-07-18 00:48:14,833 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-18 00:48:14,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:48:14,833 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:48:14,834 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 00:48:14,834 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 00:48:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-18 00:48:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-18 00:48:14,838 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-07-18 00:48:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 00:48:14,839 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-18 00:48:14,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-18 00:48:14,839 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 18 states and 18 transitions. [2020-07-18 00:48:14,869 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:48:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-18 00:48:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-18 00:48:14,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:48:14,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:48:14,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:48:14,871 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:48:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:48:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-07-18 00:48:14,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:48:14,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654664148] [2020-07-18 00:48:14,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:48:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 00:48:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 00:48:14,936 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:48:14,936 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-18 00:48:14,936 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-18 00:48:14,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 00:48:14,953 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-18 00:48:14,954 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 00:48:14,954 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 00:48:14,954 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 00:48:14,954 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 00:48:14,955 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 00:48:14,955 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 00:48:14,956 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 00:48:14,956 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 00:48:14,956 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-18 00:48:14,956 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-18 00:48:14,957 WARN L170 areAnnotationChecker]: L14-1 has no Hoare annotation [2020-07-18 00:48:14,962 WARN L170 areAnnotationChecker]: L15 has no Hoare annotation [2020-07-18 00:48:14,962 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 00:48:14,962 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 00:48:14,962 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 00:48:14,968 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-18 00:48:14,969 WARN L170 areAnnotationChecker]: evalEXIT has no Hoare annotation [2020-07-18 00:48:14,970 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-18 00:48:14,970 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2020-07-18 00:48:14,970 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-18 00:48:14,970 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-18 00:48:14,971 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 00:48:14,971 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 00:48:14,972 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-18 00:48:14,972 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-18 00:48:14,972 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 00:48:14,972 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 00:48:14,972 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-18 00:48:14,972 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-18 00:48:14,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.07 12:48:14 BoogieIcfgContainer [2020-07-18 00:48:14,978 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-18 00:48:14,982 INFO L168 Benchmark]: Toolchain (without parser) took 1612.68 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 104.8 MB in the beginning and 107.7 MB in the end (delta: -2.9 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:14,983 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 00:48:14,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.42 ms. Allocated memory is still 139.5 MB. Free memory was 104.4 MB in the beginning and 94.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:14,987 INFO L168 Benchmark]: Boogie Preprocessor took 115.82 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 183.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:14,988 INFO L168 Benchmark]: RCFGBuilder took 268.64 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 169.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:14,990 INFO L168 Benchmark]: TraceAbstraction took 982.68 ms. Allocated memory is still 203.9 MB. Free memory was 168.3 MB in the beginning and 107.7 MB in the end (delta: 60.6 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. [2020-07-18 00:48:15,001 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 0.21 ms. Allocated memory is still 139.5 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.42 ms. Allocated memory is still 139.5 MB. Free memory was 104.4 MB in the beginning and 94.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.82 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 94.7 MB in the beginning and 183.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 268.64 ms. Allocated memory is still 203.9 MB. Free memory was 183.9 MB in the beginning and 169.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 982.68 ms. Allocated memory is still 203.9 MB. Free memory was 168.3 MB in the beginning and 107.7 MB in the end (delta: 60.6 MB). Peak memory consumption was 60.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 [L26] CALL eval() [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() [L27] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...