/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/freire1_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:22:58,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:22:58,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:22:58,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:22:58,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:22:58,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:22:58,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:22:58,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:22:58,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:22:58,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:22:58,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:22:58,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:22:58,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:22:58,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:22:58,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:22:58,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:22:58,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:22:58,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:22:58,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:22:58,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:22:58,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:22:58,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:22:58,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:22:58,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:22:58,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:22:58,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:22:58,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:22:58,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:22:58,736 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:22:58,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:22:58,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:22:58,736 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:22:58,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:22:58,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:22:59,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:22:59,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:22:59,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:22:59,027 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:22:59,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire1_unwindbound1.c [2021-05-01 08:22:59,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388318a97/69d93b68c8c944d9badd4a632e043e24/FLAGcf1216d60 [2021-05-01 08:22:59,609 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:22:59,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire1_unwindbound1.c [2021-05-01 08:22:59,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388318a97/69d93b68c8c944d9badd4a632e043e24/FLAGcf1216d60 [2021-05-01 08:22:59,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/388318a97/69d93b68c8c944d9badd4a632e043e24 [2021-05-01 08:22:59,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:22:59,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:22:59,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:22:59,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:22:59,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:22:59,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:59" (1/1) ... [2021-05-01 08:22:59,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1abe9c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:22:59, skipping insertion in model container [2021-05-01 08:22:59,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:22:59" (1/1) ... [2021-05-01 08:22:59,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:23:00,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:23:00,201 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-scaling/freire1_unwindbound1.c[712,725] [2021-05-01 08:23:00,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:00,238 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:23:00,257 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-scaling/freire1_unwindbound1.c[712,725] [2021-05-01 08:23:00,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:00,290 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:23:00,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00 WrapperNode [2021-05-01 08:23:00,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:00,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:23:00,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:23:00,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:23:00,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (1/1) ... [2021-05-01 08:23:00,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:23:00,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:23:00,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:23:00,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:23:00,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (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 [2021-05-01 08:23:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:23:00,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:23:00,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:23:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:23:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:23:00,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-01 08:23:00,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:23:00,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:23:00,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:23:00,905 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:23:00,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:00 BoogieIcfgContainer [2021-05-01 08:23:00,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:23:00,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:23:00,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:23:00,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:23:00,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:22:59" (1/3) ... [2021-05-01 08:23:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570fbad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:00, skipping insertion in model container [2021-05-01 08:23:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:00" (2/3) ... [2021-05-01 08:23:00,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570fbad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:00, skipping insertion in model container [2021-05-01 08:23:00,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:00" (3/3) ... [2021-05-01 08:23:00,912 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound1.c [2021-05-01 08:23:00,916 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:23:00,918 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:23:00,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:23:00,990 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:23:00,990 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:23:00,991 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:23:00,991 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:23:00,991 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:23:00,991 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:23:00,991 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:23:00,991 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:23:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-01 08:23:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 08:23:01,022 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:01,022 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:01,023 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-01 08:23:01,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:01,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473240475] [2021-05-01 08:23:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:01,120 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:01,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:01,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:01,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:23:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:01,394 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,394 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:23:01,397 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:23:01,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473240475] [2021-05-01 08:23:01,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [473240475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:23:01,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:23:01,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:23:01,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441133864] [2021-05-01 08:23:01,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:23:01,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:23:01,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:23:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:01,414 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-01 08:23:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:23:01,485 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-01 08:23:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:23:01,487 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 [2021-05-01 08:23:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:23:01,493 INFO L225 Difference]: With dead ends: 39 [2021-05-01 08:23:01,493 INFO L226 Difference]: Without dead ends: 18 [2021-05-01 08:23:01,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-01 08:23:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-01 08:23:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-01 08:23:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-01 08:23:01,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-01 08:23:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:23:01,535 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-01 08:23:01,535 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) [2021-05-01 08:23:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-01 08:23:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:01,537 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:01,537 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:01,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:23:01,538 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-01 08:23:01,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:01,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650786459] [2021-05-01 08:23:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:01,553 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:01,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:23:01,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:23:01,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:23:01,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:01,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:23:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:01,761 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:01,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:23:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:23:01,774 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:23:01,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650786459] [2021-05-01 08:23:01,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1650786459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:23:01,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:23:01,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 08:23:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435743409] [2021-05-01 08:23:01,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 08:23:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:23:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 08:23:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 08:23:01,776 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-01 08:23:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:23:01,990 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-01 08:23:01,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 08:23:01,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 12 [2021-05-01 08:23:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:23:01,991 INFO L225 Difference]: With dead ends: 26 [2021-05-01 08:23:01,991 INFO L226 Difference]: Without dead ends: 19 [2021-05-01 08:23:01,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:23:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-01 08:23:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-01 08:23:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-05-01 08:23:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-01 08:23:02,016 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-01 08:23:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:23:02,019 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-01 08:23:02,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-01 08:23:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-01 08:23:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:02,023 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:02,023 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:02,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:23:02,023 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:02,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:02,024 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-01 08:23:02,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:02,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728824498] [2021-05-01 08:23:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:02,027 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:23:02,048 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:23:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 08:23:02,074 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 08:23:02,112 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 08:23:02,112 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:23:02,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:23:02,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:23:02 BoogieIcfgContainer [2021-05-01 08:23:02,141 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:23:02,142 INFO L168 Benchmark]: Toolchain (without parser) took 2186.16 ms. Allocated memory is still 212.9 MB. Free memory was 178.2 MB in the beginning and 172.1 MB in the end (delta: 6.1 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:02,142 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 212.9 MB. Free memory is still 194.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:23:02,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.39 ms. Allocated memory is still 212.9 MB. Free memory was 178.1 MB in the beginning and 168.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:02,143 INFO L168 Benchmark]: Boogie Preprocessor took 114.52 ms. Allocated memory is still 212.9 MB. Free memory was 168.3 MB in the beginning and 195.9 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:02,143 INFO L168 Benchmark]: RCFGBuilder took 499.92 ms. Allocated memory is still 212.9 MB. Free memory was 195.5 MB in the beginning and 181.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:02,144 INFO L168 Benchmark]: TraceAbstraction took 1233.26 ms. Allocated memory is still 212.9 MB. Free memory was 181.6 MB in the beginning and 172.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:02,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 212.9 MB. Free memory is still 194.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 331.39 ms. Allocated memory is still 212.9 MB. Free memory was 178.1 MB in the beginning and 168.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 114.52 ms. Allocated memory is still 212.9 MB. Free memory was 168.3 MB in the beginning and 195.9 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 499.92 ms. Allocated memory is still 212.9 MB. Free memory was 195.5 MB in the beginning and 181.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1233.26 ms. Allocated memory is still 212.9 MB. Free memory was 181.6 MB in the beginning and 172.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 [L32] EXPR counter++ [L32] COND TRUE counter++<1 [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1124.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 12.2ms, AutomataDifference: 309.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 12 SDslu, 20 SDs, 0 SdLazy, 41 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 159.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 170.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...