/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:22:11,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:22:11,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:22:11,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:22:11,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:22:11,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:22:11,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:22:11,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:22:11,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:22:11,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:22:11,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:22:11,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:22:11,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:22:11,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:22:11,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:22:11,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:22:11,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:22:11,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:22:11,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:22:11,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:22:11,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:22:11,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:22:11,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:22:11,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:22:11,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:22:11,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:22:11,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:22:11,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:22:11,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:22:11,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:22:11,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:22:11,701 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:22:11,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:22:11,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:22:11,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:22:11,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:22:11,977 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:22:11,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c [2021-05-06 12:22:12,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc4808eb/c3f6feac4e3f49f7a1212fbbaec1d056/FLAG529a2c141 [2021-05-06 12:22:12,388 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:22:12,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c [2021-05-06 12:22:12,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc4808eb/c3f6feac4e3f49f7a1212fbbaec1d056/FLAG529a2c141 [2021-05-06 12:22:12,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc4808eb/c3f6feac4e3f49f7a1212fbbaec1d056 [2021-05-06 12:22:12,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:22:12,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:22:12,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:22:12,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:22:12,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:22:12,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e746222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12, skipping insertion in model container [2021-05-06 12:22:12,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:22:12,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:22:12,534 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c[525,538] [2021-05-06 12:22:12,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:22:12,550 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:22:12,559 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c[525,538] [2021-05-06 12:22:12,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:22:12,574 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:22:12,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12 WrapperNode [2021-05-06 12:22:12,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:22:12,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:22:12,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:22:12,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:22:12,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... [2021-05-06 12:22:12,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:22:12,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:22:12,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:22:12,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:22:12,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:22:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:22:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:22:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:22:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:22:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:22:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:22:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:22:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:22:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:22:12,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:22:12,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:22:12,848 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:22:12,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:22:12 BoogieIcfgContainer [2021-05-06 12:22:12,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:22:12,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:22:12,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:22:12,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:22:12,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:22:12" (1/3) ... [2021-05-06 12:22:12,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5773c432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:22:12, skipping insertion in model container [2021-05-06 12:22:12,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:22:12" (2/3) ... [2021-05-06 12:22:12,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5773c432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:22:12, skipping insertion in model container [2021-05-06 12:22:12,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:22:12" (3/3) ... [2021-05-06 12:22:12,853 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll.c [2021-05-06 12:22:12,857 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:22:12,858 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:22:12,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:22:12,879 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:22:12,879 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:22:12,879 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:22:12,879 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:22:12,879 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:22:12,879 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:22:12,879 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:22:12,880 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:22:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 12:22:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 12:22:12,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:12,891 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:12,891 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2021-05-06 12:22:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:12,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506322354] [2021-05-06 12:22:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:12,967 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:13,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:22:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:22:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:22:13,129 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:22:13,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506322354] [2021-05-06 12:22:13,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [506322354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:22:13,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:22:13,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:22:13,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985942115] [2021-05-06 12:22:13,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:22:13,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:22:13,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:22:13,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:22:13,144 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:22:13,202 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-06 12:22:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:22:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 12:22:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:22:13,208 INFO L225 Difference]: With dead ends: 36 [2021-05-06 12:22:13,209 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 12:22:13,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:22:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 12:22:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-06 12:22:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 12:22:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-06 12:22:13,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-05-06 12:22:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:22:13,242 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-06 12:22:13,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:22:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-06 12:22:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 12:22:13,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:22:13,243 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:22:13,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:22:13,243 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:22:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:22:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2021-05-06 12:22:13,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:22:13,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148061228] [2021-05-06 12:22:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:22:13,249 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:22:13,272 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:22:13,272 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:22:13,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:22:13,285 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:22:13,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:22:13 BoogieIcfgContainer [2021-05-06 12:22:13,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:22:13,288 INFO L168 Benchmark]: Toolchain (without parser) took 879.77 ms. Allocated memory is still 203.4 MB. Free memory was 168.7 MB in the beginning and 142.0 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:22:13,288 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 203.4 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:22:13,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.88 ms. Allocated memory is still 203.4 MB. Free memory was 168.5 MB in the beginning and 158.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 12:22:13,290 INFO L168 Benchmark]: Boogie Preprocessor took 66.86 ms. Allocated memory is still 203.4 MB. Free memory was 158.9 MB in the beginning and 186.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:22:13,291 INFO L168 Benchmark]: RCFGBuilder took 206.86 ms. Allocated memory is still 203.4 MB. Free memory was 186.3 MB in the beginning and 172.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:22:13,291 INFO L168 Benchmark]: TraceAbstraction took 436.25 ms. Allocated memory is still 203.4 MB. Free memory was 172.4 MB in the beginning and 142.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:22:13,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 203.4 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 163.88 ms. Allocated memory is still 203.4 MB. Free memory was 168.5 MB in the beginning and 158.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.86 ms. Allocated memory is still 203.4 MB. Free memory was 158.9 MB in the beginning and 186.3 MB in the end (delta: -27.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 206.86 ms. Allocated memory is still 203.4 MB. Free memory was 186.3 MB in the beginning and 172.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 436.25 ms. Allocated memory is still 203.4 MB. Free memory was 172.4 MB in the beginning and 142.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L24] int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_int() [L27] k = __VERIFIER_nondet_int() [L29] x = 1 [L30] y = 1 [L31] c = 1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert(1 + x*z - x - z*y == 0) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 397.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.4ms, AutomataDifference: 76.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 5 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...