/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:04:25,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:04:25,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:04:25,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:04:25,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:04:25,657 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:04:25,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:04:25,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:04:25,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:04:25,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:04:25,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:04:25,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:04:25,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:04:25,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:04:25,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:04:25,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:04:25,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:04:25,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:04:25,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:04:25,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:04:25,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:04:25,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:04:25,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:04:25,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:04:25,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:04:25,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:04:25,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:04:25,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:04:25,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:04:25,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:04:25,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:04:25,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:04:25,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:04:25,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:04:25,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:04:25,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:04:25,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:04:25,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:04:25,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:04:25,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:04:25,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:04:25,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:04:25,732 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:04:26,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:04:26,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:04:26,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:04:26,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:04:26,095 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:04:26,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-04-16 08:04:26,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b876b3e/9df3b5cd51854cdfb186038a7694d3d6/FLAG98d6d1d79 [2021-04-16 08:04:26,606 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:04:26,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-04-16 08:04:26,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b876b3e/9df3b5cd51854cdfb186038a7694d3d6/FLAG98d6d1d79 [2021-04-16 08:04:27,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3b876b3e/9df3b5cd51854cdfb186038a7694d3d6 [2021-04-16 08:04:27,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:04:27,016 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:04:27,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:04:27,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:04:27,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:04:27,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b9b02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27, skipping insertion in model container [2021-04-16 08:04:27,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:04:27,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:04:27,157 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[533,546] [2021-04-16 08:04:27,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:04:27,195 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:04:27,204 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c[533,546] [2021-04-16 08:04:27,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:04:27,265 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:04:27,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27 WrapperNode [2021-04-16 08:04:27,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:04:27,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:04:27,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:04:27,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:04:27,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... [2021-04-16 08:04:27,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:04:27,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:04:27,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:04:27,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:04:27,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:04:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:04:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:04:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:04:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:04:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:04:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:04:27,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:04:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:04:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:04:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:04:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:04:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:04:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:04:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:04:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:04:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:04:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:04:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:04:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:04:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:04:27,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:04:27,757 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:04:27,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:04:27 BoogieIcfgContainer [2021-04-16 08:04:27,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:04:27,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:04:27,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:04:27,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:04:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:04:27" (1/3) ... [2021-04-16 08:04:27,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3c159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:04:27, skipping insertion in model container [2021-04-16 08:04:27,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:04:27" (2/3) ... [2021-04-16 08:04:27,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3c159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:04:27, skipping insertion in model container [2021-04-16 08:04:27,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:04:27" (3/3) ... [2021-04-16 08:04:27,778 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2021-04-16 08:04:27,783 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:04:27,786 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:04:27,833 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:04:27,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:04:27,868 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:04:27,868 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:04:27,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:04:27,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:04:27,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:04:27,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:04:27,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:04:27,891 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) [2021-04-16 08:04:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-16 08:04:27,898 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:04:27,899 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] [2021-04-16 08:04:27,899 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:04:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:04:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-04-16 08:04:27,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:04:27,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114938384] [2021-04-16 08:04:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:04:27,969 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:04:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:28,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:04:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:28,192 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:04:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:28,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,206 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,207 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:04:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:28,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:28,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:04:28,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114938384] [2021-04-16 08:04:28,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:04:28,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:04:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265411761] [2021-04-16 08:04:28,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:04:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:04:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:04:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:04:28,251 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) [2021-04-16 08:04:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:04:31,353 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-04-16 08:04:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:04:31,356 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 [2021-04-16 08:04:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:04:31,363 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:04:31,363 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:04:31,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:04:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:04:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:04:31,493 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) [2021-04-16 08:04:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-04-16 08:04:31,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-04-16 08:04:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:04:31,502 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-04-16 08:04:31,502 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) [2021-04-16 08:04:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-04-16 08:04:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-16 08:04:31,505 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:04:31,505 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] [2021-04-16 08:04:31,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:04:31,506 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:04:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:04:31,508 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-04-16 08:04:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:04:31,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453257535] [2021-04-16 08:04:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:04:31,517 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:04:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:31,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:31,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:31,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:31,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:04:31,771 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-04-16 08:04:31,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-04-16 08:04:31,891 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-04-16 08:04:31,913 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-04-16 08:04:31,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-04-16 08:04:32,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:04:32,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:04:32,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:32,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:04:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:32,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:32,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:04:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:32,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,192 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:04:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:32,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:32,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:04:32,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453257535] [2021-04-16 08:04:32,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:04:32,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 08:04:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398289759] [2021-04-16 08:04:32,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 08:04:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:04:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 08:04:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 08:04:32,203 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) [2021-04-16 08:04:32,590 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-16 08:04:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:04:41,759 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-04-16 08:04:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 08:04:41,761 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 [2021-04-16 08:04:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:04:41,763 INFO L225 Difference]: With dead ends: 47 [2021-04-16 08:04:41,763 INFO L226 Difference]: Without dead ends: 45 [2021-04-16 08:04:41,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-16 08:04:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-04-16 08:04:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-04-16 08:04:41,789 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) [2021-04-16 08:04:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-04-16 08:04:41,795 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-04-16 08:04:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:04:41,795 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-04-16 08:04:41,795 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) [2021-04-16 08:04:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-04-16 08:04:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-16 08:04:41,797 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:04:41,797 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] [2021-04-16 08:04:41,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:04:41,797 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:04:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:04:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-04-16 08:04:41,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:04:41,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162534158] [2021-04-16 08:04:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:04:41,820 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:04:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:41,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:41,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:41,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:41,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:04:41,972 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-04-16 08:04:41,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-16 08:04:42,005 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-04-16 08:04:42,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-04-16 08:04:42,096 INFO L142 QuantifierPusher]: treesize reduction 8, result has 91.8 percent of original size [2021-04-16 08:04:42,099 INFO L147 QuantifierPusher]: treesize reduction 9, result has 89.9 percent of original size 80 [2021-04-16 08:04:42,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:04:42,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:04:42,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:42,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:04:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:42,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:42,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:04:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:42,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:42,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:04:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:04:42,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:04:42,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:04:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:04:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162534158] [2021-04-16 08:04:42,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:04:42,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-16 08:04:42,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368110370] [2021-04-16 08:04:42,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-16 08:04:42,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:04:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-16 08:04:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-16 08:04:42,339 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) [2021-04-16 08:04:42,750 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-16 08:05:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:05:05,192 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-04-16 08:05:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 08:05:05,197 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 [2021-04-16 08:05:05,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:05:05,198 INFO L225 Difference]: With dead ends: 55 [2021-04-16 08:05:05,198 INFO L226 Difference]: Without dead ends: 53 [2021-04-16 08:05:05,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-16 08:05:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-04-16 08:05:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-04-16 08:05:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-04-16 08:05:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-04-16 08:05:05,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 26 [2021-04-16 08:05:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:05:05,213 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-04-16 08:05:05,213 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) [2021-04-16 08:05:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-04-16 08:05:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-16 08:05:05,214 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:05:05,214 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] [2021-04-16 08:05:05,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:05:05,214 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:05:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:05:05,215 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-04-16 08:05:05,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:05:05,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793938467] [2021-04-16 08:05:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:05:05,216 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:05:05,225 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:05:05,225 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:05:05,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:05:05,240 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:05:05,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:05:05 BoogieIcfgContainer [2021-04-16 08:05:05,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:05:05,241 INFO L168 Benchmark]: Toolchain (without parser) took 38224.72 ms. Allocated memory is still 206.6 MB. Free memory was 171.9 MB in the beginning and 151.5 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:05,242 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 188.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:05:05,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.52 ms. Allocated memory is still 206.6 MB. Free memory was 171.7 MB in the beginning and 189.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:05,242 INFO L168 Benchmark]: Boogie Preprocessor took 43.64 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 188.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:05:05,243 INFO L168 Benchmark]: RCFGBuilder took 441.47 ms. Allocated memory is still 206.6 MB. Free memory was 188.3 MB in the beginning and 170.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:05,243 INFO L168 Benchmark]: TraceAbstraction took 37480.44 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 151.5 MB in the end (delta: 19.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:05:05,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 188.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.52 ms. Allocated memory is still 206.6 MB. Free memory was 171.7 MB in the beginning and 189.8 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.64 ms. Allocated memory is still 206.6 MB. Free memory was 189.8 MB in the beginning and 188.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 441.47 ms. Allocated memory is still 206.6 MB. Free memory was 188.3 MB in the beginning and 170.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 37480.44 ms. Allocated memory is still 206.6 MB. Free memory was 170.4 MB in the beginning and 151.5 MB in the end (delta: 19.0 MB). Peak memory consumption was 20.0 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<=20) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=20) [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: 37381.1ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 24.7ms, AutomataDifference: 35556.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 86 SDslu, 148 SDs, 0 SdLazy, 327 SolverSat, 77 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 31257.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1638.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=2, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 147.7ms AutomataMinimizationTime, 3 MinimizatonAttempts, 18 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...