/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/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 00:50:48,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 00:50:48,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 00:50:48,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 00:50:48,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 00:50:48,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 00:50:48,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 00:50:48,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 00:50:48,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 00:50:48,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 00:50:48,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 00:50:48,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 00:50:48,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 00:50:48,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 00:50:48,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 00:50:48,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 00:50:48,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 00:50:48,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 00:50:48,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 00:50:48,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 00:50:48,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 00:50:48,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 00:50:48,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 00:50:48,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 00:50:48,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 00:50:48,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 00:50:48,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 00:50:48,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 00:50:48,166 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 00:50:48,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 00:50:48,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 00:50:48,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 00:50:48,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 00:50:48,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 00:50:48,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 00:50:48,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 00:50:48,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 00:50:48,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 00:50:48,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 00:50:48,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 00:50:48,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 00:50:48,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 00:50:48,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 00:50:48,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 00:50:48,190 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 00:50:48,190 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 00:50:48,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 00:50:48,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 00:50:48,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 00:50:48,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 00:50:48,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 00:50:48,191 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-18 00:50:48,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 00:50:48,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 00:50:48,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 00:50:48,515 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 00:50:48,516 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 00:50:48,516 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-18 00:50:48,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a091b7b5d/5963c8507608450c9e9cbee321ffa875/FLAGc798de3ef [2020-07-18 00:50:49,045 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 00:50:49,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-18 00:50:49,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a091b7b5d/5963c8507608450c9e9cbee321ffa875/FLAGc798de3ef [2020-07-18 00:50:49,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a091b7b5d/5963c8507608450c9e9cbee321ffa875 [2020-07-18 00:50:49,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 00:50:49,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 00:50:49,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 00:50:49,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 00:50:49,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 00:50:49,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f01846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49, skipping insertion in model container [2020-07-18 00:50:49,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 00:50:49,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 00:50:49,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:50:49,694 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 00:50:49,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 00:50:49,727 INFO L208 MainTranslator]: Completed translation [2020-07-18 00:50:49,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49 WrapperNode [2020-07-18 00:50:49,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 00:50:49,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 00:50:49,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 00:50:49,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 00:50:49,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (1/1) ... [2020-07-18 00:50:49,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 00:50:49,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 00:50:49,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 00:50:49,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 00:50:49,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (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 00:50:49,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 00:50:49,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 00:50:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-18 00:50:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 00:50:49,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 00:50:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 00:50:49,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 00:50:49,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-18 00:50:49,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-18 00:50:49,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 00:50:49,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 00:50:49,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 00:50:49,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 00:50:50,154 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 00:50:50,154 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-18 00:50:50,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:50:50 BoogieIcfgContainer [2020-07-18 00:50:50,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 00:50:50,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 00:50:50,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 00:50:50,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 00:50:50,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 12:50:49" (1/3) ... [2020-07-18 00:50:50,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7e9afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:50:50, skipping insertion in model container [2020-07-18 00:50:50,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 12:50:49" (2/3) ... [2020-07-18 00:50:50,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7e9afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 12:50:50, skipping insertion in model container [2020-07-18 00:50:50,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 12:50:50" (3/3) ... [2020-07-18 00:50:50,168 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-18 00:50:50,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 00:50:50,188 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 00:50:50,205 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 00:50:50,238 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 00:50:50,238 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 00:50:50,238 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-18 00:50:50,238 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 00:50:50,239 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 00:50:50,239 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 00:50:50,239 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 00:50:50,239 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 00:50:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-18 00:50:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-18 00:50:50,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:50:50,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:50:50,268 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:50:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:50:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 41942830, now seen corresponding path program 1 times [2020-07-18 00:50:50,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:50:50,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150829820] [2020-07-18 00:50:50,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:50:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:50:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 00:50:50,439 INFO L280 TraceCheckUtils]: 0: Hoare triple {35#true} assume true; {35#true} is VALID [2020-07-18 00:50:50,440 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {35#true} {35#true} #59#return; {35#true} is VALID [2020-07-18 00:50:50,442 INFO L263 TraceCheckUtils]: 0: Hoare triple {35#true} call ULTIMATE.init(); {35#true} is VALID [2020-07-18 00:50:50,442 INFO L280 TraceCheckUtils]: 1: Hoare triple {35#true} assume true; {35#true} is VALID [2020-07-18 00:50:50,443 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {35#true} {35#true} #59#return; {35#true} is VALID [2020-07-18 00:50:50,443 INFO L263 TraceCheckUtils]: 3: Hoare triple {35#true} call #t~ret1 := main(); {35#true} is VALID [2020-07-18 00:50:50,444 INFO L280 TraceCheckUtils]: 4: Hoare triple {35#true} havoc ~k~0; {35#true} is VALID [2020-07-18 00:50:50,444 INFO L280 TraceCheckUtils]: 5: Hoare triple {35#true} havoc ~y~0; {35#true} is VALID [2020-07-18 00:50:50,445 INFO L280 TraceCheckUtils]: 6: Hoare triple {35#true} havoc ~x~0; {35#true} is VALID [2020-07-18 00:50:50,446 INFO L280 TraceCheckUtils]: 7: Hoare triple {35#true} havoc ~c~0; {35#true} is VALID [2020-07-18 00:50:50,446 INFO L280 TraceCheckUtils]: 8: Hoare triple {35#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {35#true} is VALID [2020-07-18 00:50:50,446 INFO L280 TraceCheckUtils]: 9: Hoare triple {35#true} ~k~0 := #t~nondet0; {35#true} is VALID [2020-07-18 00:50:50,447 INFO L280 TraceCheckUtils]: 10: Hoare triple {35#true} havoc #t~nondet0; {35#true} is VALID [2020-07-18 00:50:50,447 INFO L280 TraceCheckUtils]: 11: Hoare triple {35#true} ~y~0 := 0; {35#true} is VALID [2020-07-18 00:50:50,448 INFO L280 TraceCheckUtils]: 12: Hoare triple {35#true} ~x~0 := 0; {35#true} is VALID [2020-07-18 00:50:50,448 INFO L280 TraceCheckUtils]: 13: Hoare triple {35#true} ~c~0 := 0; {35#true} is VALID [2020-07-18 00:50:50,450 INFO L280 TraceCheckUtils]: 14: Hoare triple {35#true} assume !true; {36#false} is VALID [2020-07-18 00:50:50,451 INFO L263 TraceCheckUtils]: 15: Hoare triple {36#false} call __VERIFIER_assert((if 0 == ~y~0 * ~y~0 - 2 * ~x~0 + ~y~0 then 1 else 0)); {36#false} is VALID [2020-07-18 00:50:50,451 INFO L280 TraceCheckUtils]: 16: Hoare triple {36#false} ~cond := #in~cond; {36#false} is VALID [2020-07-18 00:50:50,451 INFO L280 TraceCheckUtils]: 17: Hoare triple {36#false} assume 0 == ~cond; {36#false} is VALID [2020-07-18 00:50:50,451 INFO L280 TraceCheckUtils]: 18: Hoare triple {36#false} assume !false; {36#false} is VALID [2020-07-18 00:50:50,453 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 00:50:50,457 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:50:50,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150829820] [2020-07-18 00:50:50,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 00:50:50,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-18 00:50:50,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093688180] [2020-07-18 00:50:50,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-18 00:50:50,473 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 00:50:50,477 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-18 00:50:50,517 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:50:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-18 00:50:50,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 00:50:50,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-18 00:50:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 00:50:50,531 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-18 00:50:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:50:50,651 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-07-18 00:50:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-18 00:50:50,651 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-07-18 00:50:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 00:50:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 00:50:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2020-07-18 00:50:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 00:50:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 60 transitions. [2020-07-18 00:50:50,668 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 60 transitions. [2020-07-18 00:50:50,816 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 60 edges. 60 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:50:50,837 INFO L225 Difference]: With dead ends: 50 [2020-07-18 00:50:50,838 INFO L226 Difference]: Without dead ends: 27 [2020-07-18 00:50:50,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 00:50:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-18 00:50:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-18 00:50:50,907 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 00:50:50,908 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand 27 states. [2020-07-18 00:50:50,908 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand 27 states. [2020-07-18 00:50:50,909 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 27 states. [2020-07-18 00:50:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:50:50,914 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-07-18 00:50:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-18 00:50:50,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:50:50,915 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:50:50,915 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand 27 states. [2020-07-18 00:50:50,915 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 27 states. [2020-07-18 00:50:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 00:50:50,920 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-07-18 00:50:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-18 00:50:50,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 00:50:50,921 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 00:50:50,921 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 00:50:50,921 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 00:50:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-18 00:50:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-18 00:50:50,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-07-18 00:50:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 00:50:50,926 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-18 00:50:50,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-18 00:50:50,927 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 27 states and 28 transitions. [2020-07-18 00:50:50,963 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 00:50:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-18 00:50:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-18 00:50:50,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 00:50:50,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 00:50:50,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 00:50:50,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 00:50:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 00:50:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 31724517, now seen corresponding path program 1 times [2020-07-18 00:50:50,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 00:50:50,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328787498] [2020-07-18 00:50:50,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 00:50:50,976 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-18 00:50:50,977 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-07-18 00:50:50,977 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-18 00:50:50,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 00:50:50,995 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-18 00:50:50,995 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 00:50:50,995 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 00:50:50,995 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2020-07-18 00:50:50,995 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-18 00:50:50,996 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-18 00:50:50,996 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-18 00:50:50,996 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 00:50:50,996 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 00:50:50,996 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-18 00:50:50,997 WARN L170 areAnnotationChecker]: L5-1 has no Hoare annotation [2020-07-18 00:50:50,998 WARN L170 areAnnotationChecker]: L5-3 has no Hoare annotation [2020-07-18 00:50:50,998 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-18 00:50:50,998 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-18 00:50:50,998 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-18 00:50:50,998 WARN L170 areAnnotationChecker]: L8-2 has no Hoare annotation [2020-07-18 00:50:50,999 WARN L170 areAnnotationChecker]: L16-2 has no Hoare annotation [2020-07-18 00:50:50,999 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 00:50:50,999 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 00:50:50,999 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2020-07-18 00:50:50,999 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L33 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L17-1 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L23-3 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L23-3 has no Hoare annotation [2020-07-18 00:50:51,000 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: L17-2 has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-18 00:50:51,001 WARN L170 areAnnotationChecker]: L31 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L23-2 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L23-2 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L23-2 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L21 has no Hoare annotation [2020-07-18 00:50:51,002 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-18 00:50:51,003 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-18 00:50:51,003 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 00:50:51,006 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-18 00:50:51,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.07 12:50:51 BoogieIcfgContainer [2020-07-18 00:50:51,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-18 00:50:51,010 INFO L168 Benchmark]: Toolchain (without parser) took 1569.93 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 101.7 MB in the beginning and 100.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,011 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 137.4 MB. Free memory was 101.3 MB in the beginning and 91.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,013 INFO L168 Benchmark]: Boogie Preprocessor took 106.31 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 181.4 MB in the end (delta: -89.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,014 INFO L168 Benchmark]: RCFGBuilder took 324.73 ms. Allocated memory is still 201.3 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,015 INFO L168 Benchmark]: TraceAbstraction took 845.45 ms. Allocated memory is still 201.3 MB. Free memory was 162.0 MB in the beginning and 100.7 MB in the end (delta: 61.3 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2020-07-18 00:50:51,019 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 0.17 ms. Allocated memory is still 137.4 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 137.4 MB. Free memory was 101.3 MB in the beginning and 91.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.31 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 181.4 MB in the end (delta: -89.8 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.73 ms. Allocated memory is still 201.3 MB. Free memory was 181.4 MB in the beginning and 162.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 845.45 ms. Allocated memory is still 201.3 MB. Free memory was 162.0 MB in the beginning and 100.7 MB in the end (delta: 61.3 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int k, y, x, c; [L17] k = __VERIFIER_nondet_int() [L19] y = 0 [L20] x = 0 [L21] c = 0 [L23] COND TRUE 1 [L24] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L8] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 0 StatesRemovedByMinimization, 0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...