/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:20:40,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:20:40,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:20:40,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:20:40,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:20:40,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:20:40,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:20:40,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:20:40,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:20:40,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:20:40,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:20:40,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:20:40,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:20:40,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:20:40,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:20:40,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:20:40,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:20:40,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:20:40,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:20:40,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:20:40,213 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 08:20:40,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:20:40,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:20:40,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:20:40,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:20:40,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:20:40,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:20:40,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:20:40,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:20:40,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:20:40,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:20:40,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:20:40,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:20:40,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:20:40,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:20:40,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:20:40,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:20:40,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:20:40,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:20:40,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:20:40,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:20:40,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:20:40,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:20:40,258 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:20:40,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:20:40,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:20:40,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:20:40,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:20:40,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:20:40,791 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:20:40,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-05-01 08:20:40,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af632468/52e399fd5f8a46fe8b9ccdf8c06a5c73/FLAGcb55c9925 [2021-05-01 08:20:41,786 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:20:41,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-05-01 08:20:41,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af632468/52e399fd5f8a46fe8b9ccdf8c06a5c73/FLAGcb55c9925 [2021-05-01 08:20:41,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af632468/52e399fd5f8a46fe8b9ccdf8c06a5c73 [2021-05-01 08:20:41,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:20:41,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:20:41,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:41,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:20:41,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:20:41,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bebbb0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41, skipping insertion in model container [2021-05-01 08:20:41,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:20:41,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:20:42,134 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_valuebound10.c[533,546] [2021-05-01 08:20:42,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,191 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:20:42,309 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_valuebound10.c[533,546] [2021-05-01 08:20:42,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,369 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:20:42,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42 WrapperNode [2021-05-01 08:20:42,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:42,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:20:42,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:20:42,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:20:42,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:20:42,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:20:42,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (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 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:20:42,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:20:42,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:20:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:20:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:20:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:20:42,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:20:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:20:43,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:20:43,173 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:20:43,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:43 BoogieIcfgContainer [2021-05-01 08:20:43,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:20:43,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:20:43,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:20:43,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:20:43,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:20:41" (1/3) ... [2021-05-01 08:20:43,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5257ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:43, skipping insertion in model container [2021-05-01 08:20:43,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (2/3) ... [2021-05-01 08:20:43,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5257ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:43, skipping insertion in model container [2021-05-01 08:20:43,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:43" (3/3) ... [2021-05-01 08:20:43,211 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2021-05-01 08:20:43,232 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:20:43,235 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:20:43,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:20:43,326 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:20:43,326 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:20:43,327 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:20:43,327 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:20:43,327 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:20:43,327 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:20:43,327 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:20:43,327 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:20:43,366 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 08:20:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:20:43,373 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:43,374 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 08:20:43,374 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-01 08:20:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:43,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241918111] [2021-05-01 08:20:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:43,493 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,694 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,695 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,853 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-01 08:20:43,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,888 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,889 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,912 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 08:20:43,913 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:43,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241918111] [2021-05-01 08:20:43,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241918111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:43,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:43,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:20:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128394362] [2021-05-01 08:20:43,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:20:43,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:20:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:43,957 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 08:20:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:20:50,231 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-01 08:20:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:20:50,235 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 08:20:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:20:50,242 INFO L225 Difference]: With dead ends: 69 [2021-05-01 08:20:50,242 INFO L226 Difference]: Without dead ends: 33 [2021-05-01 08:20:50,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-01 08:20:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-01 08:20:50,364 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 08:20:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-01 08:20:50,368 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-01 08:20:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:20:50,368 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-01 08:20:50,369 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 08:20:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-01 08:20:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 08:20:50,371 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:50,371 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 08:20:50,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:20:50,371 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-01 08:20:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:50,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52255186] [2021-05-01 08:20:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:50,403 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:50,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:50,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:50,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:50,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:20:50,644 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-05-01 08:20:50,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 08:20:50,756 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-05-01 08:20:50,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 08:20:50,859 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:50,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:50,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:50,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:50,909 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:50,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:50,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:51,007 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:51,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:51,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:51,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:51,025 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:51,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:51,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:51,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:51,042 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 08:20:51,043 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:51,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52255186] [2021-05-01 08:20:51,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [52255186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:51,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:51,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 08:20:51,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031511512] [2021-05-01 08:20:51,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 08:20:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 08:20:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:20:51,051 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 08:21:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:12,140 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2021-05-01 08:21:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 08:21:12,141 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 08:21:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:12,144 INFO L225 Difference]: With dead ends: 47 [2021-05-01 08:21:12,144 INFO L226 Difference]: Without dead ends: 45 [2021-05-01 08:21:12,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 746.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:21:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-01 08:21:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-05-01 08:21:12,157 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 08:21:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-05-01 08:21:12,158 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-05-01 08:21:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:12,158 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-05-01 08:21:12,159 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 08:21:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-05-01 08:21:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 08:21:12,160 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:12,160 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 08:21:12,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:21:12,160 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-01 08:21:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433845176] [2021-05-01 08:21:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:12,163 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:12,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,214 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:12,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,215 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:21:12,220 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-05-01 08:21:12,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 08:21:12,256 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-05-01 08:21:12,258 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-05-01 08:21:12,345 INFO L142 QuantifierPusher]: treesize reduction 17, result has 82.5 percent of original size [2021-05-01 08:21:12,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 08:21:12,408 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,408 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:12,431 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,431 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:12,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,457 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:12,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:21:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:12,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:21:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:12,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,541 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:12,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:21:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:12,544 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:12,545 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:12,545 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 08:21:12,546 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:21:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433845176] [2021-05-01 08:21:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [433845176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:21:12,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:21:12,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 08:21:12,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250492781] [2021-05-01 08:21:12,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 08:21:12,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:21:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 08:21:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 08:21:12,547 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 08:21:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:31,280 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2021-05-01 08:21:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 08:21:31,568 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 08:21:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:31,569 INFO L225 Difference]: With dead ends: 76 [2021-05-01 08:21:31,570 INFO L226 Difference]: Without dead ends: 58 [2021-05-01 08:21:31,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-01 08:21:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-01 08:21:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-05-01 08:21:31,585 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 08:21:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2021-05-01 08:21:31,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 26 [2021-05-01 08:21:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:31,587 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2021-05-01 08:21:31,587 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 08:21:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2021-05-01 08:21:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:21:31,588 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:31,588 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 08:21:31,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:21:31,588 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-05-01 08:21:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:31,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490262332] [2021-05-01 08:21:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:31,591 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:31,613 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:21:31,614 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:21:31,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:21:31,629 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:21:31,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:21:31 BoogieIcfgContainer [2021-05-01 08:21:31,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:21:31,631 INFO L168 Benchmark]: Toolchain (without parser) took 49777.52 ms. Allocated memory was 169.9 MB in the beginning and 221.2 MB in the end (delta: 51.4 MB). Free memory was 135.8 MB in the beginning and 133.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 54.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:31,631 INFO L168 Benchmark]: CDTParser took 7.97 ms. Allocated memory is still 169.9 MB. Free memory is still 152.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:31,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 499.03 ms. Allocated memory is still 169.9 MB. Free memory was 135.6 MB in the beginning and 152.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:31,632 INFO L168 Benchmark]: Boogie Preprocessor took 41.71 ms. Allocated memory is still 169.9 MB. Free memory was 152.5 MB in the beginning and 150.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:31,632 INFO L168 Benchmark]: RCFGBuilder took 759.52 ms. Allocated memory is still 169.9 MB. Free memory was 150.7 MB in the beginning and 133.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:31,633 INFO L168 Benchmark]: TraceAbstraction took 48453.72 ms. Allocated memory was 169.9 MB in the beginning and 221.2 MB in the end (delta: 51.4 MB). Free memory was 133.2 MB in the beginning and 133.0 MB in the end (delta: 195.4 kB). Peak memory consumption was 52.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:31,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 7.97 ms. Allocated memory is still 169.9 MB. Free memory is still 152.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 499.03 ms. Allocated memory is still 169.9 MB. Free memory was 135.6 MB in the beginning and 152.5 MB in the end (delta: -16.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.71 ms. Allocated memory is still 169.9 MB. Free memory was 152.5 MB in the beginning and 150.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 759.52 ms. Allocated memory is still 169.9 MB. Free memory was 150.7 MB in the beginning and 133.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 48453.72 ms. Allocated memory was 169.9 MB in the beginning and 221.2 MB in the end (delta: 51.4 MB). Free memory was 133.2 MB in the beginning and 133.0 MB in the end (delta: 195.4 kB). Peak memory consumption was 52.8 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<=10) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=10) [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: 48308.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 39.0ms, AutomataDifference: 46459.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 89 SDslu, 148 SDs, 0 SdLazy, 314 SolverSat, 100 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 41492.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1730.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=3, 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: 122.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 9 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...