/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/dijkstra-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:20:39,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:20:39,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:20:39,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:20:39,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:20:39,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:20:39,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:20:39,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:20:39,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:20:39,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:20:39,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:20:39,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:20:39,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:20:39,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:20:39,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:20:39,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:20:39,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:20:39,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:20:39,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:20:39,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:20:39,536 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 08:20:39,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:20:39,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:20:39,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:20:39,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:20:39,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:20:39,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:20:39,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:20:39,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:20:39,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:20:39,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:20:39,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:20:39,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:20:39,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:20:39,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:20:39,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:20:39,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:20:39,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:20:39,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:20:39,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:20:39,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:20:39,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:20:39,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:20:39,562 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:20:39,562 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:20:39,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:20:39,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:20:39,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:20:39,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:20:39,960 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:20:39,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2021-05-01 08:20:40,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c449dc3fd/c259e8d417f64c9d956a129db515daa7/FLAG2e650c0f3 [2021-05-01 08:20:40,827 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:20:40,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound100.c [2021-05-01 08:20:40,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c449dc3fd/c259e8d417f64c9d956a129db515daa7/FLAG2e650c0f3 [2021-05-01 08:20:40,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c449dc3fd/c259e8d417f64c9d956a129db515daa7 [2021-05-01 08:20:40,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:20:40,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:20:40,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:40,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:20:40,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:20:40,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:40" (1/1) ... [2021-05-01 08:20:40,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@785e2e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:40, skipping insertion in model container [2021-05-01 08:20:40,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:40" (1/1) ... [2021-05-01 08:20:41,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:20:41,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:20:41,180 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/dijkstra-u_valuebound100.c[533,546] [2021-05-01 08:20:41,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:41,234 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:20:41,247 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/dijkstra-u_valuebound100.c[533,546] [2021-05-01 08:20:41,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:41,362 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:20:41,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41 WrapperNode [2021-05-01 08:20:41,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:41,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:20:41,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:20:41,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:20:41,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:20:41,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:20:41,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:20:41,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:20:41,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (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 08:20:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:20:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:20:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:20:41,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:20:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:20:41,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:20:41,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:20:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:20:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:20:41,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:20:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:20:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:20:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:20:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:20:41,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:20:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:20:41,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:20:41,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:20:41,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:20:41,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:20:41,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:20:41,796 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:20:41,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:41 BoogieIcfgContainer [2021-05-01 08:20:41,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:20:41,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:20:41,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:20:41,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:20:41,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:20:40" (1/3) ... [2021-05-01 08:20:41,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ceb7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:41, skipping insertion in model container [2021-05-01 08:20:41,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41" (2/3) ... [2021-05-01 08:20:41,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ceb7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:41, skipping insertion in model container [2021-05-01 08:20:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:41" (3/3) ... [2021-05-01 08:20:41,806 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.c [2021-05-01 08:20:41,812 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:20:41,832 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:20:41,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:20:41,879 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:20:41,880 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:20:41,880 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:20:41,880 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:20:41,880 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:20:41,880 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:20:41,880 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:20:41,880 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:20:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-01 08:20:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:20:41,901 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:41,902 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 08:20:41,902 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-01 08:20:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:41,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962290867] [2021-05-01 08:20:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:41,997 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:42,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:42,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:42,255 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,256 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:42,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:42,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:42,278 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 08:20:42,280 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:42,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962290867] [2021-05-01 08:20:42,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [962290867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:42,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:42,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:20:42,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721560628] [2021-05-01 08:20:42,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:20:42,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:20:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:42,311 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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 08:20:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:20:45,005 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-01 08:20:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:20:45,007 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 08:20:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:20:45,014 INFO L225 Difference]: With dead ends: 69 [2021-05-01 08:20:45,015 INFO L226 Difference]: Without dead ends: 33 [2021-05-01 08:20:45,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-01 08:20:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-01 08:20:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:20:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-01 08:20:45,060 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-01 08:20:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:20:45,060 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-01 08:20:45,061 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 08:20:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-01 08:20:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 08:20:45,062 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:45,062 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, 1] [2021-05-01 08:20:45,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:20:45,063 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-01 08:20:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:45,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49523200] [2021-05-01 08:20:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:45,067 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:45,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:45,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:20:45,265 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-05-01 08:20:45,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 08:20:45,387 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-05-01 08:20:45,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 08:20:45,484 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:45,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,507 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:45,527 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:45,617 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,618 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:45,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:45,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:45,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:45,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:45,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:45,652 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 08:20:45,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:45,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49523200] [2021-05-01 08:20:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [49523200] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:45,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:45,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 08:20:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043381067] [2021-05-01 08:20:45,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 08:20:45,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:45,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 08:20:45,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:20:45,656 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:21:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:06,658 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-05-01 08:21:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 08:21:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-01 08:21:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:06,662 INFO L225 Difference]: With dead ends: 47 [2021-05-01 08:21:06,662 INFO L226 Difference]: Without dead ends: 45 [2021-05-01 08:21:06,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:21:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-01 08:21:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-05-01 08:21:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-01 08:21:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-05-01 08:21:06,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-05-01 08:21:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:06,679 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-05-01 08:21:06,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:21:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-05-01 08:21:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 08:21:06,680 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:06,681 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:21:06,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:21:06,681 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:06,682 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-01 08:21:06,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:06,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308202359] [2021-05-01 08:21:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:06,684 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:06,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:06,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:06,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:06,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:21:06,784 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-05-01 08:21:06,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 08:21:06,832 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-05-01 08:21:06,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-05-01 08:21:06,916 INFO L142 QuantifierPusher]: treesize reduction 17, result has 82.5 percent of original size [2021-05-01 08:21:06,918 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 08:21:06,968 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:06,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:06,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:06,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:07,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:07,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:07,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:21:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:07,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:07,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:07,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:21:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:07,074 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:07,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:07,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:21:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:07,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:07,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:07,079 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 08:21:07,079 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:21:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308202359] [2021-05-01 08:21:07,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [308202359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:21:07,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:21:07,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 08:21:07,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801265224] [2021-05-01 08:21:07,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 08:21:07,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:21:07,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 08:21:07,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 08:21:07,081 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:21:26,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:26,853 INFO L93 Difference]: Finished difference Result 78 states and 112 transitions. [2021-05-01 08:21:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 08:21:27,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-01 08:21:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:27,116 INFO L225 Difference]: With dead ends: 78 [2021-05-01 08:21:27,116 INFO L226 Difference]: Without dead ends: 60 [2021-05-01 08:21:27,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 801.6ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-01 08:21:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-01 08:21:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-05-01 08:21:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 08:21:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2021-05-01 08:21:27,137 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 26 [2021-05-01 08:21:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:27,137 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2021-05-01 08:21:27,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:21:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2021-05-01 08:21:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:21:27,139 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:27,139 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:21:27,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:21:27,139 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:27,140 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-05-01 08:21:27,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:27,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109864684] [2021-05-01 08:21:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:27,143 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:27,153 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:21:27,153 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:21:27,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:21:27,178 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:21:27,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:21:27 BoogieIcfgContainer [2021-05-01 08:21:27,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:21:27,180 INFO L168 Benchmark]: Toolchain (without parser) took 46193.65 ms. Allocated memory was 240.1 MB in the beginning and 362.8 MB in the end (delta: 122.7 MB). Free memory was 205.7 MB in the beginning and 239.0 MB in the end (delta: -33.3 MB). Peak memory consumption was 89.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:27,180 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 240.1 MB. Free memory is still 222.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:27,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.55 ms. Allocated memory is still 240.1 MB. Free memory was 205.5 MB in the beginning and 223.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:27,181 INFO L168 Benchmark]: Boogie Preprocessor took 53.27 ms. Allocated memory is still 240.1 MB. Free memory was 223.5 MB in the beginning and 222.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:27,181 INFO L168 Benchmark]: RCFGBuilder took 379.56 ms. Allocated memory is still 240.1 MB. Free memory was 221.7 MB in the beginning and 204.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:27,182 INFO L168 Benchmark]: TraceAbstraction took 45378.89 ms. Allocated memory was 240.1 MB in the beginning and 362.8 MB in the end (delta: 122.7 MB). Free memory was 204.6 MB in the beginning and 239.0 MB in the end (delta: -34.4 MB). Peak memory consumption was 89.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:27,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 240.1 MB. Free memory is still 222.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 372.55 ms. Allocated memory is still 240.1 MB. Free memory was 205.5 MB in the beginning and 223.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.27 ms. Allocated memory is still 240.1 MB. Free memory was 223.5 MB in the beginning and 222.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 379.56 ms. Allocated memory is still 240.1 MB. Free memory was 221.7 MB in the beginning and 204.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 45378.89 ms. Allocated memory was 240.1 MB in the beginning and 362.8 MB in the end (delta: 122.7 MB). Free memory was 204.6 MB in the beginning and 239.0 MB in the end (delta: -34.4 MB). Peak memory consumption was 89.3 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] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_unsigned_int() [L23] CALL assume_abort_if_not(n>=0 && n<=100) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=100) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 45281.6ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 13.4ms, AutomataDifference: 43773.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 99 SDtfs, 87 SDslu, 143 SDs, 0 SdLazy, 337 SolverSat, 106 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 38214.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1569.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 62.8ms AutomataMinimizationTime, 3 MinimizatonAttempts, 11 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...