/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:37:14,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:37:14,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:37:14,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:37:14,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:37:14,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:37:14,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:37:14,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:37:14,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:37:14,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:37:14,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:37:14,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:37:14,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:37:14,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:37:14,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:37:14,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:37:14,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:37:14,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:37:14,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:37:14,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:37:14,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:37:14,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:37:14,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:37:14,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:37:14,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 05:37:14,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:37:14,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:37:14,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:37:14,633 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 [2020-08-22 05:37:14,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:37:14,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:37:14,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:37:14,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:37:14,681 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:37:14,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:37:14,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:37:14,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:37:14,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:37:14,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:37:14,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:37:14,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:37:14,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:37:14,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:37:14,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:37:14,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:37:14,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:37:14,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:37:14,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:37:14,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:37:14,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:37:14,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:37:14,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:37:14,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:37:14,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:37:14,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:37:14,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:37:14,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:37:14,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:37:14,687 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:37:15,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:37:15,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:37:15,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:37:15,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:37:15,060 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:37:15,060 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-22 05:37:15,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58abaf2c1/ba1720d870fb488a9d26a4d93fd614e7/FLAGd01305190 [2020-08-22 05:37:15,552 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:37:15,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invariants/eq1.c [2020-08-22 05:37:15,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58abaf2c1/ba1720d870fb488a9d26a4d93fd614e7/FLAGd01305190 [2020-08-22 05:37:15,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/58abaf2c1/ba1720d870fb488a9d26a4d93fd614e7 [2020-08-22 05:37:15,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:37:15,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:37:15,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:37:15,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:37:15,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:37:15,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:37:15" (1/1) ... [2020-08-22 05:37:15,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c78ef90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:15, skipping insertion in model container [2020-08-22 05:37:15,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:37:15" (1/1) ... [2020-08-22 05:37:15,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:37:16,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:37:16,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:37:16,171 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:37:16,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:37:16,196 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:37:16,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16 WrapperNode [2020-08-22 05:37:16,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:37:16,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:37:16,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:37:16,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:37:16,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,300 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (1/1) ... [2020-08-22 05:37:16,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:37:16,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:37:16,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:37:16,320 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:37:16,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (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 [2020-08-22 05:37:16,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:37:16,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:37:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 05:37:16,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:37:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:37:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 05:37:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 05:37:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:37:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:37:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:37:16,577 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:37:16,577 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 05:37:16,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:37:16 BoogieIcfgContainer [2020-08-22 05:37:16,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:37:16,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:37:16,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:37:16,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:37:16,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:37:15" (1/3) ... [2020-08-22 05:37:16,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45382019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:37:16, skipping insertion in model container [2020-08-22 05:37:16,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:37:16" (2/3) ... [2020-08-22 05:37:16,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45382019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:37:16, skipping insertion in model container [2020-08-22 05:37:16,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:37:16" (3/3) ... [2020-08-22 05:37:16,589 INFO L109 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-08-22 05:37:16,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:37:16,606 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:37:16,619 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:37:16,643 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:37:16,643 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:37:16,643 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:37:16,644 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:37:16,644 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:37:16,644 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:37:16,644 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:37:16,644 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:37:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-22 05:37:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 05:37:16,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:16,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:37:16,671 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-08-22 05:37:16,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:16,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192002953] [2020-08-22 05:37:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:16,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:16,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192002953] [2020-08-22 05:37:16,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:16,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 05:37:16,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801808004] [2020-08-22 05:37:16,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 05:37:16,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:16,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 05:37:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 05:37:16,807 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-22 05:37:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:16,834 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-22 05:37:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 05:37:16,836 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 05:37:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:16,845 INFO L225 Difference]: With dead ends: 31 [2020-08-22 05:37:16,845 INFO L226 Difference]: Without dead ends: 12 [2020-08-22 05:37:16,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 05:37:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-08-22 05:37:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-08-22 05:37:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-08-22 05:37:16,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-08-22 05:37:16,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-08-22 05:37:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:16,896 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-08-22 05:37:16,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 05:37:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-08-22 05:37:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 05:37:16,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:37:16,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:37:16,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:37:16,898 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:37:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:37:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-08-22 05:37:16,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:37:16,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808700073] [2020-08-22 05:37:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:37:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:17,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:37:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:37:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:37:17,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808700073] [2020-08-22 05:37:17,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:37:17,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 05:37:17,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959103286] [2020-08-22 05:37:17,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 05:37:17,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:37:17,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 05:37:17,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 05:37:17,200 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-08-22 05:37:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:37:17,241 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-08-22 05:37:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 05:37:17,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 05:37:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:37:17,242 INFO L225 Difference]: With dead ends: 12 [2020-08-22 05:37:17,242 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:37:17,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 05:37:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:37:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:37:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:37:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:37:17,245 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-22 05:37:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:37:17,245 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:37:17,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 05:37:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:37:17,246 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:37:17,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:37:17,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:37:17,284 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 05:37:17,284 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:37:17,284 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:37:17,285 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 05:37:17,285 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 05:37:17,285 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 05:37:17,285 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: true [2020-08-22 05:37:17,286 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-22 05:37:17,286 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-22 05:37:17,286 INFO L268 CegarLoopResult]: For program point L15(lines 15 19) no Hoare annotation was computed. [2020-08-22 05:37:17,286 INFO L264 CegarLoopResult]: At program point L15-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 05:37:17,286 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-22 05:37:17,287 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-08-22 05:37:17,287 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 05:37:17,287 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-22 05:37:17,288 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-22 05:37:17,288 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-22 05:37:17,288 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-22 05:37:17,288 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-22 05:37:17,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:37:17 BoogieIcfgContainer [2020-08-22 05:37:17,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:37:17,307 INFO L168 Benchmark]: Toolchain (without parser) took 1337.53 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.7 MB in the beginning and 135.5 MB in the end (delta: -32.8 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,308 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.68 ms. Allocated memory is still 147.8 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,311 INFO L168 Benchmark]: Boogie Preprocessor took 122.34 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.9 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,312 INFO L168 Benchmark]: RCFGBuilder took 261.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 171.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,313 INFO L168 Benchmark]: TraceAbstraction took 722.81 ms. Allocated memory is still 204.5 MB. Free memory was 170.3 MB in the beginning and 135.5 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-08-22 05:37:17,317 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 147.8 MB. Free memory was 121.2 MB in the beginning and 120.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.68 ms. Allocated memory is still 147.8 MB. Free memory was 102.3 MB in the beginning and 92.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.34 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.9 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.39 ms. Allocated memory is still 204.5 MB. Free memory was 182.9 MB in the beginning and 171.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 722.81 ms. Allocated memory is still 204.5 MB. Free memory was 170.3 MB in the beginning and 135.5 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: x == w && z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 2 SDslu, 20 SDs, 0 SdLazy, 8 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...