/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:32:00,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:32:00,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:32:00,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:32:00,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:32:00,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:32:00,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:32:00,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:32:00,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:32:00,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:32:00,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:32:00,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:32:00,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:32:00,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:32:00,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:32:00,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:32:00,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:32:00,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:32:00,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:32:00,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:32:00,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:32:00,228 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:32:00,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:32:00,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:32:00,229 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:32:00,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:32:00,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:32:00,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:32:00,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:32:00,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:32:00,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:32:00,232 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:32:00,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:32:00,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:32:00,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:32:00,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:32:00,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:32:00,524 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:32:00,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2021-05-06 12:32:00,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1f67435/938455d37ed54f6494d7fed6576391d4/FLAGd83eebccb [2021-05-06 12:32:00,949 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:32:00,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2021-05-06 12:32:00,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1f67435/938455d37ed54f6494d7fed6576391d4/FLAGd83eebccb [2021-05-06 12:32:00,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1f67435/938455d37ed54f6494d7fed6576391d4 [2021-05-06 12:32:00,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:32:00,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:32:00,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:00,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:32:00,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:32:00,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:00" (1/1) ... [2021-05-06 12:32:00,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e297fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:00, skipping insertion in model container [2021-05-06 12:32:00,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:32:00" (1/1) ... [2021-05-06 12:32:00,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:32:00,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:32:01,097 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/hard2_unwindbound20.c[526,539] [2021-05-06 12:32:01,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:01,121 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:32:01,161 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/hard2_unwindbound20.c[526,539] [2021-05-06 12:32:01,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:32:01,192 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:32:01,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01 WrapperNode [2021-05-06 12:32:01,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:32:01,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:32:01,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:32:01,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:32:01,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (1/1) ... [2021-05-06 12:32:01,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:32:01,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:32:01,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:32:01,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:32:01,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (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 [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:32:01,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:32:01,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:32:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:32:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:32:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:32:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:32:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:32:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:32:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:32:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:32:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:32:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:32:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:32:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:32:01,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:32:01,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:32:01,517 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:32:01,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:01 BoogieIcfgContainer [2021-05-06 12:32:01,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:32:01,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:32:01,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:32:01,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:32:01,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:32:00" (1/3) ... [2021-05-06 12:32:01,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d63a04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:01, skipping insertion in model container [2021-05-06 12:32:01,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:32:01" (2/3) ... [2021-05-06 12:32:01,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d63a04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:32:01, skipping insertion in model container [2021-05-06 12:32:01,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:32:01" (3/3) ... [2021-05-06 12:32:01,522 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2021-05-06 12:32:01,525 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:32:01,527 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:32:01,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:32:01,548 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:32:01,548 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:32:01,548 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:32:01,548 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:32:01,548 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:32:01,548 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:32:01,548 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:32:01,549 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:32:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:32:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 12:32:01,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:01,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:01,560 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2021-05-06 12:32:01,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:01,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058895650] [2021-05-06 12:32:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:01,601 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:01,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:32:01,728 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:01,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058895650] [2021-05-06 12:32:01,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058895650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:01,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:01,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:32:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808873618] [2021-05-06 12:32:01,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:32:01,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:32:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:01,740 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:01,892 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-05-06 12:32:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:32:01,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 12:32:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:01,898 INFO L225 Difference]: With dead ends: 57 [2021-05-06 12:32:01,898 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 12:32:01,900 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:32:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 12:32:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 12:32:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:32:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-06 12:32:01,924 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-06 12:32:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:01,924 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-06 12:32:01,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-06 12:32:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 12:32:01,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:01,925 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:01,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:32:01,925 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2021-05-06 12:32:01,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:01,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119649465] [2021-05-06 12:32:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:01,928 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:32:02,018 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:02,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119649465] [2021-05-06 12:32:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119649465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:02,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:02,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:32:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188863244] [2021-05-06 12:32:02,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:32:02,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:32:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:32:02,020 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:02,276 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-05-06 12:32:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:32:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 12:32:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:02,278 INFO L225 Difference]: With dead ends: 41 [2021-05-06 12:32:02,279 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 12:32:02,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 12:32:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 12:32:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-06 12:32:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:32:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 12:32:02,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-06 12:32:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:02,303 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 12:32:02,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 12:32:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 12:32:02,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:02,305 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:02,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:32:02,306 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2021-05-06 12:32:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:02,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500195472] [2021-05-06 12:32:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:02,313 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:32:02,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:02,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500195472] [2021-05-06 12:32:02,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500195472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:02,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:02,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 12:32:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258133861] [2021-05-06 12:32:02,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 12:32:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 12:32:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 12:32:02,416 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:02,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:02,507 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-06 12:32:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 12:32:02,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 12:32:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:02,509 INFO L225 Difference]: With dead ends: 46 [2021-05-06 12:32:02,509 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 12:32:02,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:32:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 12:32:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 12:32:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:32:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 12:32:02,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-06 12:32:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:02,521 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 12:32:02,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:32:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 12:32:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:32:02,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:02,522 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:02,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:32:02,523 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:02,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:02,523 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2021-05-06 12:32:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:02,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020667697] [2021-05-06 12:32:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:02,532 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:32:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 12:32:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:32:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:32:02,635 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:32:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020667697] [2021-05-06 12:32:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020667697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:32:02,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:32:02,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:32:02,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897049861] [2021-05-06 12:32:02,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:32:02,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:32:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:32:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:32:02,637 INFO L87 Difference]: Start difference. First operand 32 states and 41 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), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 12:32:02,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:32:02,812 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 12:32:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:32:02,812 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), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 12:32:02,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:32:02,813 INFO L225 Difference]: With dead ends: 46 [2021-05-06 12:32:02,813 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 12:32:02,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 12:32:02,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 12:32:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-06 12:32:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:32:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-06 12:32:02,819 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-06 12:32:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:32:02,820 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-06 12:32:02,820 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), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 12:32:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-06 12:32:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:32:02,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:32:02,828 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:32:02,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 12:32:02,828 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:32:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:32:02,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2021-05-06 12:32:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:32:02,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374441404] [2021-05-06 12:32:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:32:02,830 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:32:02,845 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:32:02,845 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:32:02,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 12:32:02,855 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:32:02,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:32:02 BoogieIcfgContainer [2021-05-06 12:32:02,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:32:02,856 INFO L168 Benchmark]: Toolchain (without parser) took 1891.39 ms. Allocated memory was 164.6 MB in the beginning and 219.2 MB in the end (delta: 54.5 MB). Free memory was 129.1 MB in the beginning and 198.2 MB in the end (delta: -69.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:32:02,857 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 164.6 MB. Free memory is still 146.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:32:02,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.08 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 146.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:02,857 INFO L168 Benchmark]: Boogie Preprocessor took 38.84 ms. Allocated memory is still 164.6 MB. Free memory was 146.7 MB in the beginning and 144.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:02,858 INFO L168 Benchmark]: RCFGBuilder took 283.90 ms. Allocated memory is still 164.6 MB. Free memory was 144.9 MB in the beginning and 129.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:32:02,858 INFO L168 Benchmark]: TraceAbstraction took 1336.64 ms. Allocated memory was 164.6 MB in the beginning and 219.2 MB in the end (delta: 54.5 MB). Free memory was 128.9 MB in the beginning and 198.2 MB in the end (delta: -69.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:32:02,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 164.6 MB. Free memory is still 146.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 227.08 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 146.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.84 ms. Allocated memory is still 164.6 MB. Free memory was 146.7 MB in the beginning and 144.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.90 ms. Allocated memory is still 164.6 MB. Free memory was 144.9 MB in the beginning and 129.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1336.64 ms. Allocated memory was 164.6 MB in the beginning and 219.2 MB in the end (delta: 54.5 MB). Free memory was 128.9 MB in the beginning and 198.2 MB in the end (delta: -69.3 MB). There was no memory consumed. 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: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] EXPR counter++ [L34] COND TRUE counter++<20 [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: 1301.2ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 8.9ms, AutomataDifference: 699.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 138 SDtfs, 55 SDslu, 187 SDs, 0 SdLazy, 202 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 308.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 345.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 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...