/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 FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:25:12,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:25:12,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:25:12,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:25:12,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:25:12,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:25:12,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:25:12,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:25:12,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:25:12,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:25:12,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:25:12,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:25:12,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:25:12,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:25:12,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:25:12,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:25:12,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:25:12,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:25:12,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:25:12,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:25:12,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:25:12,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:25:12,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:25:12,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:25:12,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:25:12,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:25:12,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:25:12,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:25:12,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 20:25:12,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:25:12,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:25:12,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:25:12,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:25:12,676 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:25:12,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:25:12,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:25:12,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:25:12,677 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:25:12,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:25:12,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:25:12,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:25:12,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:25:12,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:25:12,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:25:12,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:25:12,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:25:12,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:25:12,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:25:12,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:25:12,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:25:12,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:25:12,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:25:12,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:25:12,681 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:25:13,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:25:13,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:25:13,038 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:25:13,040 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:25:13,042 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:25:13,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-08-18 20:25:13,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdc94f27c/6fbfafa0126e4fc3a0944b0f85d4e104/FLAG2f2317b48 [2020-08-18 20:25:13,587 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:25:13,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sqm-iff.c [2020-08-18 20:25:13,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdc94f27c/6fbfafa0126e4fc3a0944b0f85d4e104/FLAG2f2317b48 [2020-08-18 20:25:13,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdc94f27c/6fbfafa0126e4fc3a0944b0f85d4e104 [2020-08-18 20:25:13,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:25:13,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:25:13,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:25:13,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:25:13,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:25:13,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:25:13" (1/1) ... [2020-08-18 20:25:13,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:13, skipping insertion in model container [2020-08-18 20:25:13,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:25:13" (1/1) ... [2020-08-18 20:25:13,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:25:14,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:25:14,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:25:14,257 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:25:14,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:25:14,400 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:25:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14 WrapperNode [2020-08-18 20:25:14,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:25:14,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:25:14,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:25:14,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:25:14,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... [2020-08-18 20:25:14,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:25:14,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:25:14,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:25:14,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:25:14,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 20:25:14,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:25:14,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:25:14,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 20:25:14,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 20:25:14,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:25:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:25:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:25:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 20:25:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 20:25:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:25:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:25:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:25:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:25:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:25:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:25:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:25:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:25:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:25:14,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:25:14,811 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 20:25:14,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:25:14 BoogieIcfgContainer [2020-08-18 20:25:14,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:25:14,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:25:14,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:25:14,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:25:14,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:25:13" (1/3) ... [2020-08-18 20:25:14,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6573180b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:25:14, skipping insertion in model container [2020-08-18 20:25:14,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:25:14" (2/3) ... [2020-08-18 20:25:14,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6573180b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:25:14, skipping insertion in model container [2020-08-18 20:25:14,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:25:14" (3/3) ... [2020-08-18 20:25:14,824 INFO L109 eAbstractionObserver]: Analyzing ICFG sqm-iff.c [2020-08-18 20:25:14,834 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:25:14,842 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:25:14,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:25:14,882 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:25:14,883 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:25:14,883 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:25:14,883 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:25:14,883 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:25:14,883 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:25:14,883 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:25:14,884 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:25:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-08-18 20:25:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:25:14,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:14,915 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] [2020-08-18 20:25:14,915 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-08-18 20:25:14,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:14,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926330392] [2020-08-18 20:25:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:15,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:25:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 20:25:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:25:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:25:15,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926330392] [2020-08-18 20:25:15,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:25:15,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:25:15,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950625563] [2020-08-18 20:25:15,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:25:15,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:25:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:25:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:25:15,170 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-08-18 20:25:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:25:15,299 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-08-18 20:25:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:25:15,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:25:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:25:15,317 INFO L225 Difference]: With dead ends: 62 [2020-08-18 20:25:15,317 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 20:25:15,321 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 [2020-08-18 20:25:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 20:25:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-18 20:25:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 20:25:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 20:25:15,367 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-18 20:25:15,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:25:15,367 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 20:25:15,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:25:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 20:25:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:25:15,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:25:15,369 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] [2020-08-18 20:25:15,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:25:15,370 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:25:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:25:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-08-18 20:25:15,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:25:15,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770476235] [2020-08-18 20:25:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:25:15,404 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 20:25:15,404 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 20:25:15,404 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 20:25:15,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:25:15,435 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 20:25:15,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:25:15 BoogieIcfgContainer [2020-08-18 20:25:15,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:25:15,440 INFO L168 Benchmark]: Toolchain (without parser) took 1474.53 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.7 MB in the beginning and 130.9 MB in the end (delta: -26.2 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,443 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.55 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.5 MB in the beginning and 182.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,446 INFO L168 Benchmark]: Boogie Preprocessor took 54.22 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 180.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,447 INFO L168 Benchmark]: RCFGBuilder took 358.72 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,448 INFO L168 Benchmark]: TraceAbstraction took 619.96 ms. Allocated memory is still 203.9 MB. Free memory was 162.7 MB in the beginning and 130.9 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:25:15,459 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.55 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 104.5 MB in the beginning and 182.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.22 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 180.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.72 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 619.96 ms. Allocated memory is still 203.9 MB. Free memory was 162.7 MB in the beginning and 130.9 MB in the end (delta: 31.8 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND FALSE !(i