/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/ifeqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:44:45,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:44:45,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:44:45,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:44:45,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:44:45,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:44:45,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:44:45,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:44:45,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:44:45,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:44:45,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:44:45,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:44:45,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:44:45,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:44:45,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:44:45,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:44:45,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:44:45,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:44:45,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:44:45,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:44:45,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:44:45,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:44:45,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:44:45,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:44:45,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:44:45,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:44:45,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:44:45,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:44:45,466 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 21:44:45,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:44:45,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:44:45,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:44:45,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:44:45,482 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:44:45,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:44:45,482 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:44:45,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:44:45,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:44:45,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:44:45,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:44:45,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:44:45,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:44:45,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:44:45,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:44:45,484 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:44:45,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:44:45,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:44:45,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:44:45,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:44:45,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:44:45,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:44:45,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:44:45,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:44:45,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:44:45,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:44:45,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:44:45,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:44:45,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:44:45,486 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 21:44:45,770 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:44:45,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:44:45,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:44:45,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:44:45,800 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:44:45,801 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-19 21:44:45,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e068c3bc0/c10ce3b8990c4a6084e88d6509a46a0b/FLAG2802e0ca0 [2020-07-19 21:44:46,445 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:44:46,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn1f.c [2020-07-19 21:44:46,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e068c3bc0/c10ce3b8990c4a6084e88d6509a46a0b/FLAG2802e0ca0 [2020-07-19 21:44:46,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e068c3bc0/c10ce3b8990c4a6084e88d6509a46a0b [2020-07-19 21:44:46,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:44:46,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:44:46,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:46,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:44:46,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:44:46,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:46" (1/1) ... [2020-07-19 21:44:46,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b415203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:46, skipping insertion in model container [2020-07-19 21:44:46,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:44:46" (1/1) ... [2020-07-19 21:44:46,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:44:46,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:44:47,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:47,018 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:44:47,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:44:47,055 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:44:47,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47 WrapperNode [2020-07-19 21:44:47,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:44:47,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:44:47,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:44:47,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:44:47,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (1/1) ... [2020-07-19 21:44:47,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:44:47,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:44:47,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:44:47,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:44:47,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (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 21:44:47,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:44:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:44:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:44:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:44:47,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:44:47,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:44:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:44:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:44:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:44:47,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:44:47,242 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:44:47,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:44:47,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:44:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:44:47,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:44:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:44:47,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:44:47,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:44:47,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:44:47,583 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:44:47,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:47 BoogieIcfgContainer [2020-07-19 21:44:47,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:44:47,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:44:47,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:44:47,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:44:47,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:44:46" (1/3) ... [2020-07-19 21:44:47,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574c5c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:47, skipping insertion in model container [2020-07-19 21:44:47,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:44:47" (2/3) ... [2020-07-19 21:44:47,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@574c5c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:44:47, skipping insertion in model container [2020-07-19 21:44:47,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:44:47" (3/3) ... [2020-07-19 21:44:47,594 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn1f.c [2020-07-19 21:44:47,604 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:44:47,610 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:44:47,622 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:44:47,644 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:44:47,644 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:44:47,644 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:44:47,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:44:47,645 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:44:47,645 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:44:47,645 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:44:47,645 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:44:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-19 21:44:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:44:47,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:47,670 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 21:44:47,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:47,676 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-19 21:44:47,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:47,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445325349] [2020-07-19 21:44:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b33326e [2020-07-19 21:44:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:47,870 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 21:44:47,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445325349] [2020-07-19 21:44:47,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:47,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:44:47,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990647469] [2020-07-19 21:44:47,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:44:47,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:44:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:44:47,894 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-19 21:44:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:48,019 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-19 21:44:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:44:48,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-19 21:44:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:48,030 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:44:48,031 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 21:44:48,035 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 21:44:48,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 21:44:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-19 21:44:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 21:44:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-19 21:44:48,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-19 21:44:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:48,077 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-19 21:44:48,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:44:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-19 21:44:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:44:48,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:48,079 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 21:44:48,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:44:48,079 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-19 21:44:48,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:48,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452789785] [2020-07-19 21:44:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b33326e [2020-07-19 21:44:48,107 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:48,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930122357] [2020-07-19 21:44:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b33326e 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 21:44:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:44:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:44:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:44:48,221 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 21:44:48,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452789785] [2020-07-19 21:44:48,222 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:44:48,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930122357] [2020-07-19 21:44:48,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:44:48,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:44:48,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510214221] [2020-07-19 21:44:48,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:44:48,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:44:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:44:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:44:48,225 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-19 21:44:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:44:48,301 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-19 21:44:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:44:48,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-19 21:44:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:44:48,304 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:44:48,304 INFO L226 Difference]: Without dead ends: 41 [2020-07-19 21:44:48,306 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 21:44:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-19 21:44:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-19 21:44:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:44:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 21:44:48,320 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-19 21:44:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:44:48,321 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 21:44:48,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:44:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 21:44:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:44:48,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:44:48,323 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 21:44:48,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:44:48,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:44:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:44:48,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-19 21:44:48,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:44:48,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334959459] [2020-07-19 21:44:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b33326e [2020-07-19 21:44:48,573 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:44:48,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547105971] [2020-07-19 21:44:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b33326e 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 21:44:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:44:48,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:44:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:44:48,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:44:48,674 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:44:48,674 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:44:48,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:44:48,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:44:48 BoogieIcfgContainer [2020-07-19 21:44:48,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:44:48,930 INFO L168 Benchmark]: Toolchain (without parser) took 2139.74 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 103.1 MB in the beginning and 91.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 73.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,933 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.10 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,936 INFO L168 Benchmark]: Boogie Preprocessor took 107.44 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 178.7 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,937 INFO L168 Benchmark]: RCFGBuilder took 422.42 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,938 INFO L168 Benchmark]: TraceAbstraction took 1340.32 ms. Allocated memory is still 200.8 MB. Free memory was 160.4 MB in the beginning and 91.9 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:44:48,944 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.10 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.44 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.3 MB in the beginning and 178.7 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.42 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1340.32 ms. Allocated memory is still 200.8 MB. Free memory was 160.4 MB in the beginning and 91.9 MB in the end (delta: 68.5 MB). Peak memory consumption was 68.5 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)=3, 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={-1:0}, b={-2:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=1] [L29] COND TRUE i