/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:23:30,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:23:30,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:23:30,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:23:30,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:23:30,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:23:30,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:23:30,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:23:30,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:23:30,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:23:30,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:23:30,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:23:30,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:23:30,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:23:30,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:23:30,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:23:30,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:23:30,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:23:30,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:23:30,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:23:30,866 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 08:23:30,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:23:30,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:23:30,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:23:30,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:23:30,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:23:30,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:23:30,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:23:30,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:23:30,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:23:30,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:23:30,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:23:30,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:23:30,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:23:30,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:23:30,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:23:30,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:23:30,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:23:30,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:23:30,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:23:30,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:23:30,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:23:30,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:23:30,896 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:23:30,896 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:23:31,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:23:31,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:23:31,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:23:31,253 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:23:31,254 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:23:31,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound50.c [2021-05-01 08:23:31,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772aeddc6/e78cd92c843246769c2b2b8a633abbf8/FLAG74df3b01b [2021-05-01 08:23:31,703 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:23:31,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-u_unwindbound50.c [2021-05-01 08:23:31,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772aeddc6/e78cd92c843246769c2b2b8a633abbf8/FLAG74df3b01b [2021-05-01 08:23:32,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772aeddc6/e78cd92c843246769c2b2b8a633abbf8 [2021-05-01 08:23:32,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:23:32,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:23:32,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:32,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:23:32,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:23:32,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2633381c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32, skipping insertion in model container [2021-05-01 08:23:32,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:23:32,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:23:32,257 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/geo1-u_unwindbound50.c[563,576] [2021-05-01 08:23:32,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:32,281 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:23:32,293 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/geo1-u_unwindbound50.c[563,576] [2021-05-01 08:23:32,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:23:32,320 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:23:32,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32 WrapperNode [2021-05-01 08:23:32,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:23:32,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:23:32,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:23:32,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:23:32,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (1/1) ... [2021-05-01 08:23:32,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:23:32,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:23:32,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:23:32,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:23:32,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (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 08:23:32,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:23:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:23:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:23:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:23:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:23:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:23:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:23:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:23:32,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:23:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:23:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:23:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:23:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:23:32,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:23:32,735 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:23:32,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:32 BoogieIcfgContainer [2021-05-01 08:23:32,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:23:32,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:23:32,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:23:32,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:23:32,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:23:32" (1/3) ... [2021-05-01 08:23:32,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664f4dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:32, skipping insertion in model container [2021-05-01 08:23:32,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:23:32" (2/3) ... [2021-05-01 08:23:32,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664f4dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:23:32, skipping insertion in model container [2021-05-01 08:23:32,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:23:32" (3/3) ... [2021-05-01 08:23:32,751 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u_unwindbound50.c [2021-05-01 08:23:32,756 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:23:32,769 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:23:32,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:23:32,807 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:23:32,807 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:23:32,807 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:23:32,807 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:23:32,807 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:23:32,807 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:23:32,808 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:23:32,808 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:23:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 08:23:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:32,828 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:32,829 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:32,829 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1864317590, now seen corresponding path program 1 times [2021-05-01 08:23:32,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:32,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553584111] [2021-05-01 08:23:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:32,894 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:33,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:33,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:33,036 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:33,038 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:33,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:23:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:23:33,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:23:33,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:23:33,157 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 08:23:33,159 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:23:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553584111] [2021-05-01 08:23:33,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [553584111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:23:33,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:23:33,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:23:33,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662847799] [2021-05-01 08:23:33,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:23:33,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:23:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:23:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:33,182 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2021-05-01 08:23:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:23:33,300 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-05-01 08:23:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:23:33,302 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 [2021-05-01 08:23:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:23:33,309 INFO L225 Difference]: With dead ends: 41 [2021-05-01 08:23:33,309 INFO L226 Difference]: Without dead ends: 19 [2021-05-01 08:23:33,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:23:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-01 08:23:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-01 08:23:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 08:23:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-01 08:23:33,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-05-01 08:23:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:23:33,363 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-01 08:23:33,364 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) [2021-05-01 08:23:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-01 08:23:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:23:33,365 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:23:33,365 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:23:33,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:23:33,366 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:23:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:23:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2049175951, now seen corresponding path program 1 times [2021-05-01 08:23:33,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:23:33,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138919400] [2021-05-01 08:23:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:23:33,376 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:23:33,402 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:23:33,402 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:23:33,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:23:33,421 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:23:33,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:23:33 BoogieIcfgContainer [2021-05-01 08:23:33,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:23:33,424 INFO L168 Benchmark]: Toolchain (without parser) took 1310.86 ms. Allocated memory is still 227.5 MB. Free memory was 192.9 MB in the beginning and 164.7 MB in the end (delta: 28.2 MB). Peak memory consumption was 27.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:33,424 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 227.5 MB. Free memory is still 209.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:23:33,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.65 ms. Allocated memory is still 227.5 MB. Free memory was 192.7 MB in the beginning and 183.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:33,426 INFO L168 Benchmark]: Boogie Preprocessor took 37.64 ms. Allocated memory is still 227.5 MB. Free memory was 183.0 MB in the beginning and 181.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:33,428 INFO L168 Benchmark]: RCFGBuilder took 374.64 ms. Allocated memory is still 227.5 MB. Free memory was 181.5 MB in the beginning and 197.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:33,429 INFO L168 Benchmark]: TraceAbstraction took 684.12 ms. Allocated memory is still 227.5 MB. Free memory was 196.7 MB in the beginning and 164.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:23:33,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 227.5 MB. Free memory is still 209.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 206.65 ms. Allocated memory is still 227.5 MB. Free memory was 192.7 MB in the beginning and 183.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.64 ms. Allocated memory is still 227.5 MB. Free memory was 183.0 MB in the beginning and 181.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.64 ms. Allocated memory is still 227.5 MB. Free memory was 181.5 MB in the beginning and 197.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 684.12 ms. Allocated memory is still 227.5 MB. Free memory was 196.7 MB in the beginning and 164.7 MB in the end (delta: 32.0 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: 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] unsigned int z, k; [L25] long long x, y, c; [L26] z = __VERIFIER_nondet_unsigned_int() [L27] k = __VERIFIER_nondet_unsigned_int() [L29] x = 1 [L30] y = z [L31] c = 1 [L33] EXPR counter++ [L33] COND TRUE counter++<50 [L34] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 602.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.2ms, AutomataDifference: 144.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 13 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...