/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:19:13,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:19:13,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:19:13,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:19:14,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:19:14,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:19:14,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:19:14,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:19:14,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:19:14,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:19:14,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:19:14,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:19:14,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:19:14,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:19:14,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:19:14,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:19:14,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:19:14,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:19:14,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:19:14,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:19:14,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:19:14,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:19:14,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:19:14,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:19:14,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:19:14,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:19:14,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:19:14,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:19:14,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:19:14,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:19:14,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:19:14,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:19:14,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:19:14,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:19:14,085 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:19:14,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:19:14,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:19:14,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:19:14,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:19:14,412 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:19:14,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-01 08:19:14,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcb7105c/3c878da94b534c98b59630ba0a7ec570/FLAG2ab29c27e [2021-05-01 08:19:14,866 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:19:14,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-01 08:19:14,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcb7105c/3c878da94b534c98b59630ba0a7ec570/FLAG2ab29c27e [2021-05-01 08:19:14,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dcb7105c/3c878da94b534c98b59630ba0a7ec570 [2021-05-01 08:19:14,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:19:14,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:19:14,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:14,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:19:14,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:19:14,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:14" (1/1) ... [2021-05-01 08:19:14,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a58f84e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:14, skipping insertion in model container [2021-05-01 08:19:14,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:14" (1/1) ... [2021-05-01 08:19:14,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:19:14,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:19:15,058 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/hard-u.c[545,558] [2021-05-01 08:19:15,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:15,086 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:19:15,117 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/hard-u.c[545,558] [2021-05-01 08:19:15,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:15,152 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:19:15,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15 WrapperNode [2021-05-01 08:19:15,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:15,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:19:15,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:19:15,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:19:15,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... [2021-05-01 08:19:15,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:19:15,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:19:15,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:19:15,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:19:15,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:19:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:19:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:19:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:19:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:19:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:19:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:19:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:19:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:19:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:19:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:19:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:19:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:19:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:19:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:19:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:19:15,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:19:15,506 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:19:15,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:15 BoogieIcfgContainer [2021-05-01 08:19:15,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:19:15,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:19:15,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:19:15,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:19:15,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:19:14" (1/3) ... [2021-05-01 08:19:15,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfd86b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:15, skipping insertion in model container [2021-05-01 08:19:15,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:15" (2/3) ... [2021-05-01 08:19:15,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfd86b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:15, skipping insertion in model container [2021-05-01 08:19:15,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:15" (3/3) ... [2021-05-01 08:19:15,532 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2021-05-01 08:19:15,536 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:19:15,539 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:19:15,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:19:15,598 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:19:15,598 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:19:15,598 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:19:15,599 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:19:15,599 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:19:15,599 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:19:15,599 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:19:15,599 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:19:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-01 08:19:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 08:19:15,622 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:15,622 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:15,622 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-01 08:19:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:15,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127521922] [2021-05-01 08:19:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:15,677 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:15,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:15,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:15,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:15,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:15,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:15,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:15,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:15,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:15,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:15,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:15,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:15,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127521922] [2021-05-01 08:19:15,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1127521922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:15,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:15,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:19:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967235531] [2021-05-01 08:19:15,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:19:15,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:19:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:15,883 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:16,077 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-01 08:19:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:19:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-01 08:19:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:16,085 INFO L225 Difference]: With dead ends: 61 [2021-05-01 08:19:16,085 INFO L226 Difference]: Without dead ends: 30 [2021-05-01 08:19:16,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-01 08:19:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-01 08:19:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 08:19:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-01 08:19:16,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-01 08:19:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:16,145 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-01 08:19:16,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-01 08:19:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 08:19:16,146 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:16,147 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:16,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:19:16,147 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-01 08:19:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244241938] [2021-05-01 08:19:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:16,154 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 08:19:16,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:16,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:16,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:16,329 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:16,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244241938] [2021-05-01 08:19:16,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244241938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:16,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:16,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 08:19:16,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328364853] [2021-05-01 08:19:16,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 08:19:16,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 08:19:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:19:16,332 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:16,654 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-01 08:19:16,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 08:19:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-01 08:19:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:16,656 INFO L225 Difference]: With dead ends: 43 [2021-05-01 08:19:16,656 INFO L226 Difference]: Without dead ends: 41 [2021-05-01 08:19:16,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 08:19:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-01 08:19:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-01 08:19:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 08:19:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-01 08:19:16,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-01 08:19:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:16,667 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-01 08:19:16,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-01 08:19:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-01 08:19:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-01 08:19:16,668 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:16,668 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:16,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:19:16,668 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-01 08:19:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081668813] [2021-05-01 08:19:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:16,672 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:19:16,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:16,737 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:19:16,743 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:19:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-01 08:19:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:16,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:16,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:16,784 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:16,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081668813] [2021-05-01 08:19:16,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081668813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:16,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:16,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 08:19:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554437279] [2021-05-01 08:19:16,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 08:19:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 08:19:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 08:19:16,787 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:19:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:17,069 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-01 08:19:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 08:19:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-01 08:19:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:17,072 INFO L225 Difference]: With dead ends: 47 [2021-05-01 08:19:17,072 INFO L226 Difference]: Without dead ends: 45 [2021-05-01 08:19:17,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 08:19:17,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-01 08:19:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-01 08:19:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 08:19:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-01 08:19:17,088 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-01 08:19:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:17,088 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-01 08:19:17,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:19:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-01 08:19:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-01 08:19:17,089 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:17,089 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:17,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:19:17,089 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:17,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-01 08:19:17,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:17,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139731775] [2021-05-01 08:19:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:17,092 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:17,100 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:19:17,101 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:19:17,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:19:17,112 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:19:17,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:19:17 BoogieIcfgContainer [2021-05-01 08:19:17,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:19:17,114 INFO L168 Benchmark]: Toolchain (without parser) took 2218.08 ms. Allocated memory was 209.7 MB in the beginning and 289.4 MB in the end (delta: 79.7 MB). Free memory was 174.2 MB in the beginning and 210.4 MB in the end (delta: -36.3 MB). Peak memory consumption was 43.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:17,114 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 209.7 MB. Free memory is still 190.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:19:17,114 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.07 ms. Allocated memory is still 209.7 MB. Free memory was 173.9 MB in the beginning and 192.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:17,115 INFO L168 Benchmark]: Boogie Preprocessor took 39.85 ms. Allocated memory is still 209.7 MB. Free memory was 192.3 MB in the beginning and 190.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:17,115 INFO L168 Benchmark]: RCFGBuilder took 313.30 ms. Allocated memory is still 209.7 MB. Free memory was 190.6 MB in the beginning and 174.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:17,115 INFO L168 Benchmark]: TraceAbstraction took 1603.21 ms. Allocated memory was 209.7 MB in the beginning and 289.4 MB in the end (delta: 79.7 MB). Free memory was 174.6 MB in the beginning and 210.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:17,119 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 209.7 MB. Free memory is still 190.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.07 ms. Allocated memory is still 209.7 MB. Free memory was 173.9 MB in the beginning and 192.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.85 ms. Allocated memory is still 209.7 MB. Free memory was 192.3 MB in the beginning and 190.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 313.30 ms. Allocated memory is still 209.7 MB. Free memory was 190.6 MB in the beginning and 174.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1603.21 ms. Allocated memory was 209.7 MB in the beginning and 289.4 MB in the end (delta: 79.7 MB). Free memory was 174.6 MB in the beginning and 210.4 MB in the end (delta: -35.9 MB). Peak memory consumption was 44.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] B = __VERIFIER_nondet_unsigned_int() [L27] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L27] RET assume_abort_if_not(B >= 1) [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1509.1ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 9.8ms, AutomataDifference: 832.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 88 SDtfs, 89 SDslu, 65 SDs, 0 SdLazy, 209 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 368.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 366.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 14 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...