/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:19:27,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:19:27,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:19:27,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:19:27,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:19:27,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:19:27,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:19:27,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:19:27,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:19:27,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:19:27,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:19:27,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:19:27,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:19:27,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:19:27,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:19:27,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:19:27,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:19:27,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:19:27,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:19:27,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:19:27,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:19:27,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:19:27,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:19:27,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:19:27,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 14:19:27,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:19:27,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:19:27,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:19:27,076 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 14:19:27,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:19:27,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:19:27,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:19:27,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:19:27,092 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:19:27,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:19:27,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:19:27,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:19:27,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:19:27,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:19:27,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:19:27,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:19:27,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:19:27,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:19:27,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:19:27,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:19:27,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:19:27,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:19:27,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:19:27,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:19:27,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:19:27,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:19:27,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:19:27,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:19:27,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:19:27,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:19:27,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:27,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:19:27,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:19:27,097 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:19:27,395 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:19:27,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:19:27,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:19:27,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:19:27,414 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:19:27,414 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2020-07-20 14:19:27,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a26f000/6394462d74814f38b796eecf59bbd080/FLAGe15b67260 [2020-07-20 14:19:27,949 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:19:27,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c [2020-07-20 14:19:27,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a26f000/6394462d74814f38b796eecf59bbd080/FLAGe15b67260 [2020-07-20 14:19:28,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48a26f000/6394462d74814f38b796eecf59bbd080 [2020-07-20 14:19:28,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:19:28,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:19:28,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:28,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:19:28,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:19:28,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@196af3e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28, skipping insertion in model container [2020-07-20 14:19:28,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:19:28,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:19:28,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:28,649 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:19:28,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:19:28,679 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:19:28,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28 WrapperNode [2020-07-20 14:19:28,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:19:28,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:19:28,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:19:28,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:19:28,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (1/1) ... [2020-07-20 14:19:28,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:19:28,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:19:28,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:19:28,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:19:28,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (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 14:19:28,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:19:28,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:19:28,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:19:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:19:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:19:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:19:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:19:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:19:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:19:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:19:29,086 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:19:29,087 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:19:29,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:29 BoogieIcfgContainer [2020-07-20 14:19:29,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:19:29,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:19:29,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:19:29,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:19:29,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:19:28" (1/3) ... [2020-07-20 14:19:29,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe39a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:29, skipping insertion in model container [2020-07-20 14:19:29,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:19:28" (2/3) ... [2020-07-20 14:19:29,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe39a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:19:29, skipping insertion in model container [2020-07-20 14:19:29,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:19:29" (3/3) ... [2020-07-20 14:19:29,101 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2020-07-20 14:19:29,117 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:19:29,131 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:19:29,155 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:19:29,186 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:19:29,186 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:19:29,187 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:19:29,187 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:19:29,187 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:19:29,187 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:19:29,187 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:19:29,187 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:19:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 14:19:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:19:29,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:29,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:29,221 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -564387615, now seen corresponding path program 1 times [2020-07-20 14:19:29,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:29,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119492443] [2020-07-20 14:19:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:19:29,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:19:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:19:29,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:19:29,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:19:29,378 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 14:19:29,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:19:29,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119492443] [2020-07-20 14:19:29,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:19:29,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:19:29,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910658497] [2020-07-20 14:19:29,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:19:29,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:19:29,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:19:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:19:29,401 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 14:19:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:19:29,421 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-07-20 14:19:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:19:29,422 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 14:19:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:19:29,430 INFO L225 Difference]: With dead ends: 32 [2020-07-20 14:19:29,431 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 14:19:29,434 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 14:19:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 14:19:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 14:19:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 14:19:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 14:19:29,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 14:19:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:19:29,474 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 14:19:29,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:19:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 14:19:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 14:19:29,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:19:29,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:19:29,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:29,690 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:19:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:19:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash -538271495, now seen corresponding path program 1 times [2020-07-20 14:19:29,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:19:29,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66440646] [2020-07-20 14:19:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:19:29,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:19:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:19:29,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:19:29,763 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:19:29,783 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:19:29,783 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:19:30,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:19:30,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:19:30 BoogieIcfgContainer [2020-07-20 14:19:30,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:19:30,028 INFO L168 Benchmark]: Toolchain (without parser) took 1687.91 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 101.0 MB in the beginning and 131.9 MB in the end (delta: -30.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,029 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.95 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,032 INFO L168 Benchmark]: Boogie Preprocessor took 124.88 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 91.0 MB in the beginning and 178.8 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,033 INFO L168 Benchmark]: RCFGBuilder took 285.25 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 165.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,034 INFO L168 Benchmark]: TraceAbstraction took 932.78 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 131.9 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 7.1 GB. [2020-07-20 14:19:30,038 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 337.95 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.88 ms. Allocated memory was 143.1 MB in the beginning and 200.3 MB in the end (delta: 57.1 MB). Free memory was 91.0 MB in the beginning and 178.8 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.25 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 165.1 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 932.78 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 131.9 MB in the end (delta: 32.6 MB). Peak memory consumption was 32.6 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: [L13] int x=__VERIFIER_nondet_int(); [L13] int x=__VERIFIER_nondet_int(); [L14] int *p = &x; VAL [p={2:0}, x={2:0}] [L16] EXPR \read(x) VAL [\read(x)=100, p={2:0}, x={2:0}] [L16] COND FALSE !(x<100) [L19] CALL __VERIFIER_assert(0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 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=20occurred 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, 23 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 51 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...