/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:02:26,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:02:26,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:02:26,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:02:26,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:02:26,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:02:26,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:02:26,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:02:27,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:02:27,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:02:27,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:02:27,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:02:27,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:02:27,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:02:27,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:02:27,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:02:27,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:02:27,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:02:27,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:02:27,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:02:27,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:02:27,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:02:27,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:02:27,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:02:27,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:02:27,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:02:27,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:02:27,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:02:27,046 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 18:02:27,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:02:27,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:02:27,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:02:27,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:02:27,101 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:02:27,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:02:27,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:02:27,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:02:27,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:02:27,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:02:27,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:02:27,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:02:27,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:02:27,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:02:27,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:02:27,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:02:27,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:27,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:02:27,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:02:27,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:02:27,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:02:27,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:02:27,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:02:27,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:02:27,111 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:02:27,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:02:27,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:02:27,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:02:27,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:02:27,459 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:02:27,460 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-18 18:02:27,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e8a3949a/96e08f5471c34e02bce1aff57e19f3b3/FLAG11042bb8c [2020-08-18 18:02:27,950 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:02:27,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-18 18:02:27,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e8a3949a/96e08f5471c34e02bce1aff57e19f3b3/FLAG11042bb8c [2020-08-18 18:02:28,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e8a3949a/96e08f5471c34e02bce1aff57e19f3b3 [2020-08-18 18:02:28,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:02:28,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:02:28,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:28,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:02:28,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:02:28,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22589b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28, skipping insertion in model container [2020-08-18 18:02:28,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:02:28,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:02:28,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:28,558 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:02:28,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:28,589 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:02:28,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28 WrapperNode [2020-08-18 18:02:28,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:28,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:02:28,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:02:28,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:02:28,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (1/1) ... [2020-08-18 18:02:28,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:02:28,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:02:28,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:02:28,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:02:28,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (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 18:02:28,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:02:28,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:02:28,764 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:02:28,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:02:28,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:02:28,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:02:28,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:02:28,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:02:28,764 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:02:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:02:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:02:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:02:28,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:02:28,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:02:28,930 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:02:28,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:28 BoogieIcfgContainer [2020-08-18 18:02:28,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:02:28,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:02:28,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:02:28,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:02:28,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:02:28" (1/3) ... [2020-08-18 18:02:28,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525e4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:28, skipping insertion in model container [2020-08-18 18:02:28,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:28" (2/3) ... [2020-08-18 18:02:28,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525e4cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:28, skipping insertion in model container [2020-08-18 18:02:28,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:28" (3/3) ... [2020-08-18 18:02:28,942 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-08-18 18:02:28,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:02:28,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:02:28,974 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:02:28,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:02:28,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:02:28,997 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:02:28,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:02:28,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:02:28,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:02:28,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:02:28,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:02:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 18:02:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:29,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:29,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:29,019 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-08-18 18:02:29,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:29,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244810134] [2020-08-18 18:02:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:29,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:29,157 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 18:02:29,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244810134] [2020-08-18 18:02:29,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:29,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 18:02:29,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014995880] [2020-08-18 18:02:29,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 18:02:29,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:29,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 18:02:29,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 18:02:29,179 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 18:02:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:29,200 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-08-18 18:02:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 18:02:29,202 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 18:02:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:29,209 INFO L225 Difference]: With dead ends: 35 [2020-08-18 18:02:29,209 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 18:02:29,213 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 [2020-08-18 18:02:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 18:02:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-18 18:02:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 18:02:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-18 18:02:29,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-18 18:02:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:29,250 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-18 18:02:29,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 18:02:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-18 18:02:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:29,251 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:29,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:29,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:02:29,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-08-18 18:02:29,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:29,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338303028] [2020-08-18 18:02:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:29,260 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-18 18:02:29,260 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-18 18:02:29,260 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:02:29,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:02:29,275 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-18 18:02:29,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:02:29 BoogieIcfgContainer [2020-08-18 18:02:29,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:02:29,278 INFO L168 Benchmark]: Toolchain (without parser) took 938.04 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 102.2 MB in the beginning and 146.1 MB in the end (delta: -43.8 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:29,279 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:02:29,280 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:29,281 INFO L168 Benchmark]: Boogie Preprocessor took 99.95 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:29,282 INFO L168 Benchmark]: RCFGBuilder took 243.16 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 167.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:29,283 INFO L168 Benchmark]: TraceAbstraction took 340.55 ms. Allocated memory is still 201.3 MB. Free memory was 167.1 MB in the beginning and 146.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:29,288 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.39 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.95 ms. Allocated memory was 139.5 MB in the beginning and 201.3 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.0 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.16 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 167.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 340.55 ms. Allocated memory is still 201.3 MB. Free memory was 167.1 MB in the beginning and 146.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: 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: [L16] int k, y, x, c; [L17] k = __VERIFIER_nondet_int() [L19] y = 0 [L20] x = 0 [L21] c = 0 [L23] COND TRUE 1 [L24] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L8] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...