/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:55,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:55,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:55,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:55,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:55,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:55,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:55,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:55,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:55,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:55,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:55,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:55,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:55,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:55,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:55,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:55,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:55,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:55,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:55,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:55,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:55,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:55,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:55,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:55,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:48:55,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:55,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:55,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:55,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:48:55,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:55,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:55,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:55,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:55,999 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:55,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:55,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:56,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:56,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:56,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:56,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:56,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:56,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:56,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:56,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:56,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:56,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:56,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:56,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:56,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:56,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:56,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:56,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:56,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:56,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:56,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:56,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:56,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:56,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:56,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:48:56,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:56,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:56,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:56,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:56,363 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:56,364 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-20 11:48:56,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0818a63e9/c8b4854e9193488cb1d9a8e49aa85622/FLAG6e65f3635 [2020-07-20 11:48:56,907 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:56,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-07-20 11:48:56,915 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0818a63e9/c8b4854e9193488cb1d9a8e49aa85622/FLAG6e65f3635 [2020-07-20 11:48:57,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0818a63e9/c8b4854e9193488cb1d9a8e49aa85622 [2020-07-20 11:48:57,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:57,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:57,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:57,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:57,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:57,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478c2760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57, skipping insertion in model container [2020-07-20 11:48:57,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:57,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:57,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:57,478 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:57,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:57,508 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:57,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57 WrapperNode [2020-07-20 11:48:57,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:57,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:57,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:57,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:57,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (1/1) ... [2020-07-20 11:48:57,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:57,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:57,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:57,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:57,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (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 [2020-07-20 11:48:57,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:57,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:57,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:48:57,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:57,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:48:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:48:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 11:48:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:58,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:58,055 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:48:58,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:58 BoogieIcfgContainer [2020-07-20 11:48:58,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:58,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:58,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:58,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:58,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:57" (1/3) ... [2020-07-20 11:48:58,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb638c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:58, skipping insertion in model container [2020-07-20 11:48:58,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:57" (2/3) ... [2020-07-20 11:48:58,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb638c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:58, skipping insertion in model container [2020-07-20 11:48:58,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:58" (3/3) ... [2020-07-20 11:48:58,067 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-07-20 11:48:58,079 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:58,087 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:58,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:58,136 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:58,136 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:58,136 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:58,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:58,136 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:58,136 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:58,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:58,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 11:48:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:48:58,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:58,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:58,164 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-07-20 11:48:58,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:58,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319431116] [2020-07-20 11:48:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:58,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:58,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:58,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319431116] [2020-07-20 11:48:58,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:58,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:58,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702674505] [2020-07-20 11:48:58,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:58,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:58,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:58,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:58,292 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-20 11:48:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:58,319 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-07-20 11:48:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:58,321 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 11:48:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:58,330 INFO L225 Difference]: With dead ends: 30 [2020-07-20 11:48:58,330 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 11:48:58,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 11:48:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 11:48:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 11:48:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-20 11:48:58,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-07-20 11:48:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:58,377 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-20 11:48:58,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-20 11:48:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:48:58,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:58,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:58,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:58,593 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-07-20 11:48:58,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:58,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105044429] [2020-07-20 11:48:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:58,625 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:48:58,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:48:58,647 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:48:58,648 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:48:58,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:58,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:58 BoogieIcfgContainer [2020-07-20 11:48:58,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:58,893 INFO L168 Benchmark]: Toolchain (without parser) took 1628.17 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 103.4 MB in the beginning and 145.0 MB in the end (delta: -41.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,896 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.01 ms. Allocated memory is still 146.8 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,902 INFO L168 Benchmark]: Boogie Preprocessor took 117.31 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 182.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,903 INFO L168 Benchmark]: RCFGBuilder took 431.41 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 169.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,904 INFO L168 Benchmark]: TraceAbstraction took 830.09 ms. Allocated memory is still 203.9 MB. Free memory was 169.7 MB in the beginning and 145.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:58,908 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.01 ms. Allocated memory is still 146.8 MB. Free memory was 103.2 MB in the beginning and 93.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.31 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.4 MB in the beginning and 182.2 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.41 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 169.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 830.09 ms. Allocated memory is still 203.9 MB. Free memory was 169.7 MB in the beginning and 145.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int x = 1; [L17] unsigned int y = __VERIFIER_nondet_uint(); [L19] COND FALSE !(!(y > 0)) VAL [x=1, y=1] [L21] COND FALSE !(x < y) VAL [x=1, y=1] [L29] CALL __VERIFIER_assert(x != y) VAL [\old(cond)=0] [L9] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L10] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 25 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...