/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/divbin2_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:21:39,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:21:39,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:21:39,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:21:39,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:21:39,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:21:39,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:21:39,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:21:39,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:21:39,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:21:39,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:21:39,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:21:39,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:21:39,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:21:39,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:21:39,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:21:39,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:21:39,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:21:39,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:21:39,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:21:39,939 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 08:21:39,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:21:39,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:21:39,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:21:39,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:21:39,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:21:39,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:21:39,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:21:39,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:21:39,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:21:39,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:21:39,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:21:39,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:21:39,955 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:21:39,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:21:40,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:21:40,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:21:40,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:21:40,321 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:21:40,321 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:21:40,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2021-05-01 08:21:40,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875efaa67/6a2d1ccfe694444ab4eb4faffdc68719/FLAGeca22f341 [2021-05-01 08:21:40,954 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:21:40,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2021-05-01 08:21:40,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875efaa67/6a2d1ccfe694444ab4eb4faffdc68719/FLAGeca22f341 [2021-05-01 08:21:41,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/875efaa67/6a2d1ccfe694444ab4eb4faffdc68719 [2021-05-01 08:21:41,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:21:41,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:21:41,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:21:41,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:21:41,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:21:41,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c8aa67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41, skipping insertion in model container [2021-05-01 08:21:41,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:21:41,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:21:41,527 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/divbin2_unwindbound20.i[959,972] [2021-05-01 08:21:41,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:21:41,550 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:21:41,569 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/divbin2_unwindbound20.i[959,972] [2021-05-01 08:21:41,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:21:41,605 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:21:41,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41 WrapperNode [2021-05-01 08:21:41,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:21:41,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:21:41,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:21:41,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:21:41,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (1/1) ... [2021-05-01 08:21:41,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:21:41,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:21:41,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:21:41,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:21:41,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (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 08:21:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:21:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:21:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:21:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:21:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:21:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:21:41,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:21:41,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:21:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:21:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:21:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:21:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:21:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:21:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:21:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:21:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:21:41,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:21:42,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:21:42,121 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:21:42,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:21:42 BoogieIcfgContainer [2021-05-01 08:21:42,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:21:42,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:21:42,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:21:42,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:21:42,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:21:41" (1/3) ... [2021-05-01 08:21:42,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7881725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:21:42, skipping insertion in model container [2021-05-01 08:21:42,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:21:41" (2/3) ... [2021-05-01 08:21:42,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7881725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:21:42, skipping insertion in model container [2021-05-01 08:21:42,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:21:42" (3/3) ... [2021-05-01 08:21:42,142 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2021-05-01 08:21:42,147 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:21:42,151 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:21:42,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:21:42,209 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:21:42,209 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:21:42,209 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:21:42,210 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:21:42,210 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:21:42,210 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:21:42,210 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:21:42,210 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:21:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 08:21:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:21:42,237 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:42,238 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:21:42,238 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2021-05-01 08:21:42,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:42,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981143780] [2021-05-01 08:21:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:42,319 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:42,434 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:42,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:42,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:21:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:42,502 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,503 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:42,504 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 08:21:42,506 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:21:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981143780] [2021-05-01 08:21:42,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [981143780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:21:42,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:21:42,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:21:42,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990416627] [2021-05-01 08:21:42,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:21:42,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:21:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:21:42,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:21:42,525 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 2.6666666666666665) internal successors, (8), 2 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) [2021-05-01 08:21:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:42,605 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-01 08:21:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:21:42,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2021-05-01 08:21:42,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:42,615 INFO L225 Difference]: With dead ends: 44 [2021-05-01 08:21:42,615 INFO L226 Difference]: Without dead ends: 22 [2021-05-01 08:21:42,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:21:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-01 08:21:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-01 08:21:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 08:21:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-01 08:21:42,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-01 08:21:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:42,654 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-01 08:21:42,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-05-01 08:21:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-01 08:21:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 08:21:42,656 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:42,656 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:21:42,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:21:42,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2021-05-01 08:21:42,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:42,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684599279] [2021-05-01 08:21:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:42,661 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:42,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:21:42,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:21:42,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:21:42,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:42,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:21:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:42,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:42,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:21:42,770 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 08:21:42,770 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:21:42,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684599279] [2021-05-01 08:21:42,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [684599279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:21:42,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:21:42,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 08:21:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035053846] [2021-05-01 08:21:42,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 08:21:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:21:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 08:21:42,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 08:21:42,774 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:21:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:42,898 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-01 08:21:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-01 08:21:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-05-01 08:21:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:42,902 INFO L225 Difference]: With dead ends: 35 [2021-05-01 08:21:42,902 INFO L226 Difference]: Without dead ends: 23 [2021-05-01 08:21:42,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:21:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-01 08:21:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-01 08:21:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 08:21:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-01 08:21:42,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-01 08:21:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:42,929 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-01 08:21:42,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 08:21:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-01 08:21:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-01 08:21:42,929 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:42,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:21:42,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:21:42,930 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2021-05-01 08:21:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:42,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588589152] [2021-05-01 08:21:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:42,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:42,960 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:21:42,960 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:21:42,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:21:42,980 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:21:42,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:21:42 BoogieIcfgContainer [2021-05-01 08:21:42,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:21:42,982 INFO L168 Benchmark]: Toolchain (without parser) took 1607.56 ms. Allocated memory is still 189.8 MB. Free memory was 155.7 MB in the beginning and 171.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 56.9 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:42,982 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 189.8 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:42,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.09 ms. Allocated memory is still 189.8 MB. Free memory was 155.5 MB in the beginning and 145.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:42,983 INFO L168 Benchmark]: Boogie Preprocessor took 72.76 ms. Allocated memory is still 189.8 MB. Free memory was 145.7 MB in the beginning and 173.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:42,984 INFO L168 Benchmark]: RCFGBuilder took 441.93 ms. Allocated memory is still 189.8 MB. Free memory was 173.5 MB in the beginning and 157.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:42,984 INFO L168 Benchmark]: TraceAbstraction took 857.11 ms. Allocated memory is still 189.8 MB. Free memory was 157.3 MB in the beginning and 171.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 58.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:42,986 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 189.8 MB. Free memory was 172.7 MB in the beginning and 172.6 MB in the end (delta: 105.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 227.09 ms. Allocated memory is still 189.8 MB. Free memory was 155.5 MB in the beginning and 145.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 72.76 ms. Allocated memory is still 189.8 MB. Free memory was 145.7 MB in the beginning and 173.5 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 441.93 ms. Allocated memory is still 189.8 MB. Free memory was 173.5 MB in the beginning and 157.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 857.11 ms. Allocated memory is still 189.8 MB. Free memory was 157.3 MB in the beginning and 171.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 58.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: 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: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_unsigned_int() [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] EXPR counter++ [L34] COND TRUE counter++<20 [L35] COND TRUE !(r >= b) [L38] EXPR counter++ [L38] COND FALSE !(counter++<20) [L48] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 758.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 14.4ms, AutomataDifference: 234.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 52 SDtfs, 12 SDslu, 33 SDs, 0 SdLazy, 56 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 95.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 48.3ms 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...