/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:45:37,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:45:37,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:45:37,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:45:37,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:45:37,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:45:37,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:45:37,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:45:37,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:45:37,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:45:37,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:45:37,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:45:37,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:45:37,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:45:37,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:45:37,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:45:37,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:45:37,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:45:37,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:45:37,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:45:37,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:45:37,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:45:37,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:45:37,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:45:37,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:45:37,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 21:45:37,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 21:45:37,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 21:45:37,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 21:45:37,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 21:45:37,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 21:45:37,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 21:45:37,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 21:45:37,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:45:37,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:45:37,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:45:37,075 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 [2020-07-19 21:45:37,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:45:37,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:45:37,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:45:37,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:45:37,106 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:45:37,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:45:37,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:45:37,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:45:37,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:45:37,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:45:37,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:45:37,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:45:37,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:45:37,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:45:37,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:45:37,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:45:37,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:45:37,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:45:37,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:45:37,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:45:37,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:45:37,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:45:37,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:45:37,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:45:37,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:45:37,383 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:45:37,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:45:37,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:45:37,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:45:37,404 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:45:37,404 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-07-19 21:45:37,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28652fdf/f311ce83c163447592f7a757b3d311f3/FLAGc4bd5f46d [2020-07-19 21:45:37,989 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:45:37,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-07-19 21:45:37,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28652fdf/f311ce83c163447592f7a757b3d311f3/FLAGc4bd5f46d [2020-07-19 21:45:38,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f28652fdf/f311ce83c163447592f7a757b3d311f3 [2020-07-19 21:45:38,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:45:38,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:45:38,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:38,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:45:38,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:45:38,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0c3774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38, skipping insertion in model container [2020-07-19 21:45:38,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:45:38,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:45:38,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:38,688 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:45:38,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:38,746 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:45:38,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38 WrapperNode [2020-07-19 21:45:38,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:38,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:45:38,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:45:38,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:45:38,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (1/1) ... [2020-07-19 21:45:38,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:45:38,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:45:38,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:45:38,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:45:38,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (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 [2020-07-19 21:45:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:45:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:45:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:45:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:45:38,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:45:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:45:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:45:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:45:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:45:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:45:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:45:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:45:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:45:39,234 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:45:39,235 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:45:39,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:39 BoogieIcfgContainer [2020-07-19 21:45:39,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:45:39,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:45:39,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:45:39,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:45:39,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:38" (1/3) ... [2020-07-19 21:45:39,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:39, skipping insertion in model container [2020-07-19 21:45:39,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:38" (2/3) ... [2020-07-19 21:45:39,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519d68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:39, skipping insertion in model container [2020-07-19 21:45:39,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:39" (3/3) ... [2020-07-19 21:45:39,253 INFO L109 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-07-19 21:45:39,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:45:39,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:45:39,305 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:45:39,327 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:45:39,327 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:45:39,327 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:45:39,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:45:39,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:45:39,328 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:45:39,328 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:45:39,328 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:45:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-19 21:45:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:45:39,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:39,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:39,353 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-19 21:45:39,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:39,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361562379] [2020-07-19 21:45:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7702c8df [2020-07-19 21:45:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:39,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361562379] [2020-07-19 21:45:39,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:39,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:45:39,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949738495] [2020-07-19 21:45:39,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:45:39,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:45:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:45:39,620 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-19 21:45:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:39,754 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-19 21:45:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:45:39,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:45:39,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:39,765 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:45:39,765 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 21:45:39,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:45:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 21:45:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-19 21:45:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 21:45:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-19 21:45:39,815 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-19 21:45:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:39,816 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-19 21:45:39,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:45:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-19 21:45:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:45:39,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:39,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:39,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:45:39,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-19 21:45:39,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:39,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208625301] [2020-07-19 21:45:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7702c8df [2020-07-19 21:45:39,846 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:45:39,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975161076] [2020-07-19 21:45:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7702c8df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:45:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:39,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208625301] [2020-07-19 21:45:39,980 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:45:39,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975161076] [2020-07-19 21:45:39,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:39,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:45:39,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826820562] [2020-07-19 21:45:39,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:45:39,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:39,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:45:39,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:45:39,984 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-19 21:45:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:40,074 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-19 21:45:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:45:40,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-19 21:45:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:40,078 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:45:40,078 INFO L226 Difference]: Without dead ends: 41 [2020-07-19 21:45:40,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:45:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-19 21:45:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-19 21:45:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:45:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 21:45:40,093 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-19 21:45:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:40,094 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 21:45:40,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:45:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 21:45:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:45:40,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:40,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:45:40,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:45:40,310 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-19 21:45:40,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:40,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147412196] [2020-07-19 21:45:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7702c8df [2020-07-19 21:45:40,366 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:45:40,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902684359] [2020-07-19 21:45:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7702c8df No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:45:40,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:45:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:45:40,431 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:45:40,454 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:45:40,455 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:45:40,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:40,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:45:40 BoogieIcfgContainer [2020-07-19 21:45:40,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:45:40,708 INFO L168 Benchmark]: Toolchain (without parser) took 2354.84 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,710 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.21 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,712 INFO L168 Benchmark]: Boogie Preprocessor took 132.72 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 179.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,713 INFO L168 Benchmark]: RCFGBuilder took 357.92 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 161.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,714 INFO L168 Benchmark]: TraceAbstraction took 1465.33 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 92.9 MB in the end (delta: 68.1 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:40,718 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 392.21 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.72 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.6 MB in the beginning and 179.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.92 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 161.6 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1465.33 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 92.9 MB in the end (delta: 68.1 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=2, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=1] [L29] COND TRUE i