/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/sqrt1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:10:10,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:10:10,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:10:10,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 08:10:10,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:10:10,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:10:10,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:10:10,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:10:10,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:10:10,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:10:10,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:10:10,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:10:10,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:10:10,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:10:10,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:10:10,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:10:10,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:10:10,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:10:10,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:10:10,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:10:10,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:10:10,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:10:10,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:10:10,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:10:10,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:10:10,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:10:10,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:10:10,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:10:10,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:10:10,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:10:10,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:10:10,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:10:10,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:10:10,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:10:10,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:10:10,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:10:10,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:10:10,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:10:10,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:10:10,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:10:10,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:10:10,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:10:10,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:10:10,184 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:10:10,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:10:10,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:10:10,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:10:10,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:10:10,569 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:10:10,569 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:10:10,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-04-16 08:10:10,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd038bdd/6781d7b81c114baba9e3da2552c7e4ba/FLAGa4146c5cb [2021-04-16 08:10:11,071 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:10:11,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-04-16 08:10:11,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd038bdd/6781d7b81c114baba9e3da2552c7e4ba/FLAGa4146c5cb [2021-04-16 08:10:11,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd038bdd/6781d7b81c114baba9e3da2552c7e4ba [2021-04-16 08:10:11,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:10:11,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:10:11,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:10:11,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:10:11,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:10:11,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6250a4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11, skipping insertion in model container [2021-04-16 08:10:11,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:10:11,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:10:11,650 WARN L226 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/sqrt1-ll_unwindbound10.c[520,533] [2021-04-16 08:10:11,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:10:11,688 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:10:11,704 WARN L226 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/sqrt1-ll_unwindbound10.c[520,533] [2021-04-16 08:10:11,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:10:11,742 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:10:11,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11 WrapperNode [2021-04-16 08:10:11,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:10:11,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:10:11,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:10:11,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:10:11,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (1/1) ... [2021-04-16 08:10:11,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:10:11,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:10:11,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:10:11,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:10:11,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (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 [2021-04-16 08:10:11,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:10:11,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:10:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:10:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:10:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:10:11,922 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:10:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:10:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:10:11,922 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:10:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:10:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:10:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:10:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:10:11,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:10:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:10:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:10:11,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:10:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:10:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:10:11,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:10:12,206 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:10:12,263 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:10:12,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:10:12 BoogieIcfgContainer [2021-04-16 08:10:12,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:10:12,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:10:12,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:10:12,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:10:12,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:10:11" (1/3) ... [2021-04-16 08:10:12,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d6e15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:10:12, skipping insertion in model container [2021-04-16 08:10:12,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:10:11" (2/3) ... [2021-04-16 08:10:12,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d6e15b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:10:12, skipping insertion in model container [2021-04-16 08:10:12,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:10:12" (3/3) ... [2021-04-16 08:10:12,273 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2021-04-16 08:10:12,278 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:10:12,282 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:10:12,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:10:12,324 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:10:12,324 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:10:12,324 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:10:12,325 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:10:12,325 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:10:12,325 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:10:12,325 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:10:12,325 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:10:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-04-16 08:10:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 08:10:12,349 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:10:12,350 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:10:12,350 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:10:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:10:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-04-16 08:10:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:10:12,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648501307] [2021-04-16 08:10:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:10:12,415 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:10:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:12,489 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:12,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:12,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:10:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:12,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:10:12,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648501307] [2021-04-16 08:10:12,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:10:12,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:10:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992605517] [2021-04-16 08:10:12,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:10:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:10:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:10:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:10:12,631 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-04-16 08:10:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:10:12,758 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-04-16 08:10:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:10:12,760 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 [2021-04-16 08:10:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:10:12,766 INFO L225 Difference]: With dead ends: 47 [2021-04-16 08:10:12,767 INFO L226 Difference]: Without dead ends: 22 [2021-04-16 08:10:12,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:10:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-04-16 08:10:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-04-16 08:10:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-04-16 08:10:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-04-16 08:10:12,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-04-16 08:10:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:10:12,805 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-04-16 08:10:12,805 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) [2021-04-16 08:10:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-04-16 08:10:12,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 08:10:12,807 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:10:12,807 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:10:12,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:10:12,808 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:10:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:10:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-04-16 08:10:12,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:10:12,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344065042] [2021-04-16 08:10:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:10:12,812 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:10:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:12,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:10:12,862 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,863 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:10:12,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:10:12,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,870 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:12,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:10:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:12,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:12,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 08:10:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:10:12,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344065042] [2021-04-16 08:10:12,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:10:12,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 08:10:12,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436896902] [2021-04-16 08:10:12,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-16 08:10:12,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:10:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-16 08:10:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-16 08:10:12,925 INFO L87 Difference]: Start difference. First operand 21 states and 27 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) [2021-04-16 08:10:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:10:13,105 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-04-16 08:10:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-16 08:10:13,106 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 [2021-04-16 08:10:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:10:13,108 INFO L225 Difference]: With dead ends: 32 [2021-04-16 08:10:13,108 INFO L226 Difference]: Without dead ends: 23 [2021-04-16 08:10:13,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:10:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-04-16 08:10:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-04-16 08:10:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-04-16 08:10:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-04-16 08:10:13,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-04-16 08:10:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:10:13,127 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-04-16 08:10:13,127 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) [2021-04-16 08:10:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-04-16 08:10:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 08:10:13,127 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:10:13,128 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:10:13,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:10:13,128 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:10:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:10:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-04-16 08:10:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:10:13,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818260473] [2021-04-16 08:10:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:10:13,132 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:10:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:13,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:13,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:13,199 INFO L142 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-04-16 08:10:13,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 08:10:13,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:13,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:10:13,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:13,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:10:13,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:13,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:13,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:10:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:10:13,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:10:13,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:10:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 08:10:13,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818260473] [2021-04-16 08:10:13,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:10:13,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-16 08:10:13,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037054349] [2021-04-16 08:10:13,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-16 08:10:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:10:13,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-16 08:10:13,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-16 08:10:13,292 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-04-16 08:10:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:10:13,631 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-04-16 08:10:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 08:10:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2021-04-16 08:10:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:10:13,635 INFO L225 Difference]: With dead ends: 36 [2021-04-16 08:10:13,635 INFO L226 Difference]: Without dead ends: 34 [2021-04-16 08:10:13,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-16 08:10:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-04-16 08:10:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-04-16 08:10:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:10:13,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-04-16 08:10:13,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-04-16 08:10:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:10:13,662 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-04-16 08:10:13,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-04-16 08:10:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-04-16 08:10:13,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-16 08:10:13,663 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:10:13,663 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:10:13,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:10:13,664 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:10:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:10:13,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-04-16 08:10:13,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:10:13,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489413349] [2021-04-16 08:10:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:10:13,678 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:10:13,693 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:10:13,694 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:10:13,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:10:13,721 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:10:13,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:10:13 BoogieIcfgContainer [2021-04-16 08:10:13,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:10:13,723 INFO L168 Benchmark]: Toolchain (without parser) took 2252.24 ms. Allocated memory is still 194.0 MB. Free memory was 159.2 MB in the beginning and 152.5 MB in the end (delta: 6.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:10:13,725 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 194.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:10:13,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.52 ms. Allocated memory is still 194.0 MB. Free memory was 159.0 MB in the beginning and 149.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:10:13,727 INFO L168 Benchmark]: Boogie Preprocessor took 100.89 ms. Allocated memory is still 194.0 MB. Free memory was 149.1 MB in the beginning and 177.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:10:13,731 INFO L168 Benchmark]: RCFGBuilder took 418.24 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 161.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:10:13,732 INFO L168 Benchmark]: TraceAbstraction took 1454.21 ms. Allocated memory is still 194.0 MB. Free memory was 161.4 MB in the beginning and 152.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:10:13,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 194.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.52 ms. Allocated memory is still 194.0 MB. Free memory was 159.0 MB in the beginning and 149.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.89 ms. Allocated memory is still 194.0 MB. Free memory was 149.1 MB in the beginning and 177.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 7.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.24 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 161.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1454.21 ms. Allocated memory is still 194.0 MB. Free memory was 161.4 MB in the beginning and 152.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: 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: [L20] int counter = 0; [L22] int n; [L23] long long a, s, t; [L24] n = __VERIFIER_nondet_int() [L26] a = 0 [L27] s = 1 [L28] t = 1 [L30] EXPR counter++ [L30] COND TRUE counter++<10 [L31] CALL __VERIFIER_assert(t == 2*a + 1) [L12] COND FALSE !(!(cond)) [L31] RET __VERIFIER_assert(t == 2*a + 1) [L32] CALL __VERIFIER_assert(s == (a + 1) * (a + 1)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1385.9ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 14.1ms, AutomataDifference: 680.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 79 SDtfs, 28 SDslu, 89 SDs, 0 SdLazy, 109 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 296.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 352.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 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...