/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/bresenham-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:19:56,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:19:56,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:19:56,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:19:56,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:19:56,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:19:56,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:19:56,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:19:56,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:19:56,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:19:56,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:19:56,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:19:56,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:19:56,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:19:56,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:19:56,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:19:56,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:19:56,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:19:56,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:19:56,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:19:56,242 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 08:19:56,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:19:56,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:19:56,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:19:56,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:19:56,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:19:56,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:19:56,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:19:56,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:19:56,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:19:56,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:19:56,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:19:56,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:19:56,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:19:56,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:19:56,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:19:56,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:19:56,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:19:56,256 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:19:56,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:19:56,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:19:56,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:19:56,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:19:56,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:19:56,613 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:19:56,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-05-01 08:19:56,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f545e056d/11e2deb0374140279882251f55914ee9/FLAGd852226ad [2021-05-01 08:19:57,129 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:19:57,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-05-01 08:19:57,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f545e056d/11e2deb0374140279882251f55914ee9/FLAGd852226ad [2021-05-01 08:19:57,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f545e056d/11e2deb0374140279882251f55914ee9 [2021-05-01 08:19:57,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:19:57,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:19:57,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:57,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:19:57,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:19:57,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5edd8829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57, skipping insertion in model container [2021-05-01 08:19:57,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:19:57,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:19:57,707 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/bresenham-ll_valuebound20.c[597,610] [2021-05-01 08:19:57,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:57,745 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:19:57,776 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/bresenham-ll_valuebound20.c[597,610] [2021-05-01 08:19:57,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:57,819 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:19:57,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57 WrapperNode [2021-05-01 08:19:57,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:57,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:19:57,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:19:57,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:19:57,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (1/1) ... [2021-05-01 08:19:57,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:19:57,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:19:57,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:19:57,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:19:57,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (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 08:19:57,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:19:57,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:19:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:19:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:19:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:19:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:19:57,978 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:19:57,979 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:19:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:19:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:19:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:19:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:19:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:19:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:19:58,294 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:19:58,295 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:19:58,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:58 BoogieIcfgContainer [2021-05-01 08:19:58,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:19:58,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:19:58,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:19:58,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:19:58,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:19:57" (1/3) ... [2021-05-01 08:19:58,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c245b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:58, skipping insertion in model container [2021-05-01 08:19:58,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:57" (2/3) ... [2021-05-01 08:19:58,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c245b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:58, skipping insertion in model container [2021-05-01 08:19:58,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:58" (3/3) ... [2021-05-01 08:19:58,315 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.c [2021-05-01 08:19:58,319 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:19:58,323 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:19:58,355 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:19:58,380 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:19:58,380 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:19:58,381 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:19:58,381 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:19:58,381 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:19:58,381 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:19:58,381 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:19:58,381 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:19:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 08:19:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:19:58,409 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:58,409 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:58,410 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-01 08:19:58,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:58,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559065194] [2021-05-01 08:19:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:58,486 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:58,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:58,705 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:58,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:19:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:58,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,724 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:58,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:19:58,728 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:58,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559065194] [2021-05-01 08:19:58,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [559065194] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:58,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:58,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:19:58,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335254789] [2021-05-01 08:19:58,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:19:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:58,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:19:58,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:58,747 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:19:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:58,847 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-01 08:19:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:19:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-01 08:19:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:58,860 INFO L225 Difference]: With dead ends: 57 [2021-05-01 08:19:58,861 INFO L226 Difference]: Without dead ends: 27 [2021-05-01 08:19:58,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-01 08:19:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-01 08:19:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 08:19:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-01 08:19:58,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-01 08:19:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:58,916 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-01 08:19:58,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:19:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-01 08:19:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:19:58,918 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:58,918 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:58,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:19:58,919 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-01 08:19:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160374687] [2021-05-01 08:19:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:58,931 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:58,948 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:19:58,948 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:19:58,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:19:58,963 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:19:58,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:19:58 BoogieIcfgContainer [2021-05-01 08:19:58,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:19:58,965 INFO L168 Benchmark]: Toolchain (without parser) took 1446.45 ms. Allocated memory is still 275.8 MB. Free memory was 241.5 MB in the beginning and 205.5 MB in the end (delta: 36.0 MB). Peak memory consumption was 36.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:58,966 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 275.8 MB. Free memory was 258.0 MB in the beginning and 257.9 MB in the end (delta: 79.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:19:58,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 275.8 MB. Free memory was 241.3 MB in the beginning and 258.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:58,967 INFO L168 Benchmark]: Boogie Preprocessor took 86.38 ms. Allocated memory is still 275.8 MB. Free memory was 258.3 MB in the beginning and 259.0 MB in the end (delta: -637.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:58,967 INFO L168 Benchmark]: RCFGBuilder took 386.20 ms. Allocated memory is still 275.8 MB. Free memory was 259.0 MB in the beginning and 241.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:58,968 INFO L168 Benchmark]: TraceAbstraction took 666.91 ms. Allocated memory is still 275.8 MB. Free memory was 241.2 MB in the beginning and 205.5 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:58,970 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 275.8 MB. Free memory was 258.0 MB in the beginning and 257.9 MB in the end (delta: 79.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 296.52 ms. Allocated memory is still 275.8 MB. Free memory was 241.3 MB in the beginning and 258.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 86.38 ms. Allocated memory is still 275.8 MB. Free memory was 258.3 MB in the beginning and 259.0 MB in the end (delta: -637.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 386.20 ms. Allocated memory is still 275.8 MB. Free memory was 259.0 MB in the beginning and 241.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 666.91 ms. Allocated memory is still 275.8 MB. Free memory was 241.2 MB in the beginning and 205.5 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L22] int X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(X>=0 && X<=20) [L11] COND FALSE !(!cond) [L25] RET assume_abort_if_not(X>=0 && X<=20) [L26] Y = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(Y>=0 && Y<=20) [L11] COND FALSE !(!cond) [L27] RET assume_abort_if_not(Y>=0 && Y<=20) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L35] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 574.9ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 15.3ms, AutomataDifference: 128.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37.8ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...