/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/loops-crafted-1/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 07:42:49,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 07:42:49,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 07:42:49,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 07:42:49,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 07:42:49,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 07:42:49,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 07:42:49,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 07:42:49,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 07:42:49,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 07:42:49,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 07:42:49,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 07:42:49,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 07:42:49,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 07:42:49,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 07:42:49,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 07:42:49,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 07:42:49,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 07:42:49,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 07:42:49,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 07:42:49,923 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 07:42:49,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 07:42:49,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 07:42:49,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 07:42:49,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 07:42:49,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 07:42:49,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 07:42:49,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 07:42:49,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 07:42:49,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 07:42:49,941 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 07:42:49,942 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 07:42:49,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 07:42:49,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 07:42:49,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 07:42:49,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:42:49,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 07:42:49,943 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 07:42:49,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 07:42:50,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 07:42:50,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 07:42:50,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 07:42:50,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 07:42:50,260 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 07:42:50,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2021-05-01 07:42:50,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28420523b/75cc4ac47411475893185141fdfaf080/FLAGed92a7213 [2021-05-01 07:42:50,647 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 07:42:50,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2021-05-01 07:42:50,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28420523b/75cc4ac47411475893185141fdfaf080/FLAGed92a7213 [2021-05-01 07:42:50,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28420523b/75cc4ac47411475893185141fdfaf080 [2021-05-01 07:42:50,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 07:42:50,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 07:42:50,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 07:42:50,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 07:42:50,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 07:42:50,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24dd4364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50, skipping insertion in model container [2021-05-01 07:42:50,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 07:42:50,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 07:42:50,791 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c[454,467] [2021-05-01 07:42:50,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:42:50,807 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 07:42:50,815 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c[454,467] [2021-05-01 07:42:50,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:42:50,835 INFO L208 MainTranslator]: Completed translation [2021-05-01 07:42:50,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50 WrapperNode [2021-05-01 07:42:50,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 07:42:50,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 07:42:50,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 07:42:50,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 07:42:50,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (1/1) ... [2021-05-01 07:42:50,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 07:42:50,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 07:42:50,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 07:42:50,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 07:42:50,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (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 07:42:50,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 07:42:50,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 07:42:50,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 07:42:50,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 07:42:50,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 07:42:50,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 07:42:50,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 07:42:50,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 07:42:50,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 07:42:50,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 07:42:50,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 07:42:50,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 07:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 07:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 07:42:50,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 07:42:51,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 07:42:51,193 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 07:42:51,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:42:51 BoogieIcfgContainer [2021-05-01 07:42:51,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 07:42:51,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 07:42:51,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 07:42:51,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 07:42:51,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 07:42:50" (1/3) ... [2021-05-01 07:42:51,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc68a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:42:51, skipping insertion in model container [2021-05-01 07:42:51,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:42:50" (2/3) ... [2021-05-01 07:42:51,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc68a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:42:51, skipping insertion in model container [2021-05-01 07:42:51,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:42:51" (3/3) ... [2021-05-01 07:42:51,199 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.c [2021-05-01 07:42:51,208 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 07:42:51,210 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 07:42:51,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 07:42:51,286 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 07:42:51,287 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 07:42:51,287 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 07:42:51,287 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 07:42:51,287 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 07:42:51,287 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 07:42:51,287 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 07:42:51,287 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 07:42:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-01 07:42:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 07:42:51,306 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:42:51,307 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:42:51,308 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:42:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:42:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1146993295, now seen corresponding path program 1 times [2021-05-01 07:42:51,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:42:51,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595295763] [2021-05-01 07:42:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:42:51,377 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:42:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:51,519 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,520 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,521 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,521 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:51,529 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:42:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:51,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,576 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,578 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 07:42:51,579 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:42:51,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595295763] [2021-05-01 07:42:51,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595295763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:42:51,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:42:51,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 07:42:51,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126668924] [2021-05-01 07:42:51,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 07:42:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:42:51,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 07:42:51,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 07:42:51,596 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 07:42:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:42:51,678 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2021-05-01 07:42:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 07:42:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-05-01 07:42:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:42:51,683 INFO L225 Difference]: With dead ends: 39 [2021-05-01 07:42:51,683 INFO L226 Difference]: Without dead ends: 18 [2021-05-01 07:42:51,685 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 07:42:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-01 07:42:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-01 07:42:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-05-01 07:42:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-01 07:42:51,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-05-01 07:42:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:42:51,710 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-01 07:42:51,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 07:42:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-01 07:42:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-01 07:42:51,711 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:42:51,711 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:42:51,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 07:42:51,711 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:42:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:42:51,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1162558691, now seen corresponding path program 1 times [2021-05-01 07:42:51,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:42:51,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447687385] [2021-05-01 07:42:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:42:51,749 INFO L142 QuantifierPusher]: treesize reduction 29, result has 37.0 percent of original size [2021-05-01 07:42:51,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:42:51,768 INFO L181 rdanLoopAcceleration]: Guard: Formula: (= (mod v_main_~j~0_8 2) 0) InVars {main_~j~0=v_main_~j~0_8} OutVars{main_~j~0=v_main_~j~0_8} AuxVars[] AssignedVars[] [2021-05-01 07:42:51,778 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,782 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,784 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,786 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,789 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,790 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:42:51,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 07:42:51,802 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:42:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:51,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:51,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:51,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:42:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:51,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:51,938 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 07:42:51,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:51,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,965 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:42:51,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:51,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-01 07:42:51,983 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:42:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447687385] [2021-05-01 07:42:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [447687385] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:42:51,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:42:51,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 07:42:51,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98505461] [2021-05-01 07:42:51,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 07:42:51,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:42:51,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 07:42:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-01 07:42:51,985 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 07:42:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:42:52,088 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-01 07:42:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 07:42:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-01 07:42:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:42:52,090 INFO L225 Difference]: With dead ends: 24 [2021-05-01 07:42:52,090 INFO L226 Difference]: Without dead ends: 19 [2021-05-01 07:42:52,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:42:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-01 07:42:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-01 07:42:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-05-01 07:42:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-01 07:42:52,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2021-05-01 07:42:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:42:52,097 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-01 07:42:52,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 07:42:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-01 07:42:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-01 07:42:52,098 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:42:52,098 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:42:52,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 07:42:52,098 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:42:52,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:42:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1035344830, now seen corresponding path program 1 times [2021-05-01 07:42:52,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:42:52,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325580799] [2021-05-01 07:42:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:42:52,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:52,108 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_8 v_main_~n~0_8) InVars {main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_8} OutVars{main_~i~0=v_main_~i~0_8, main_~n~0=v_main_~n~0_8} AuxVars[] AssignedVars[] [2021-05-01 07:42:52,115 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.7 percent of original size [2021-05-01 07:42:52,120 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,122 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,126 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,128 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,130 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,143 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:42:52,146 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,147 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:42:52,150 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:42:52,156 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,159 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,162 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,165 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,168 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,170 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.7 percent of original size 61 [2021-05-01 07:42:52,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 07:42:52,190 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:42:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:52,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,248 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 07:42:52,258 INFO L142 QuantifierPusher]: treesize reduction 117, result has 30.8 percent of original size [2021-05-01 07:42:52,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-05-01 07:42:52,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:42:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:52,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,301 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 07:42:52,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-05-01 07:42:52,376 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,384 INFO L147 QuantifierPusher]: treesize reduction 2, result has 96.7 percent of original size 58 [2021-05-01 07:42:52,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-05-01 07:42:52,419 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:42:52,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325580799] [2021-05-01 07:42:52,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [325580799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:42:52,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:42:52,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:42:52,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449905642] [2021-05-01 07:42:52,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:42:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:42:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:42:52,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:42:52,427 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 07:42:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:42:52,718 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-01 07:42:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:42:52,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2021-05-01 07:42:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:42:52,720 INFO L225 Difference]: With dead ends: 30 [2021-05-01 07:42:52,720 INFO L226 Difference]: Without dead ends: 18 [2021-05-01 07:42:52,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-01 07:42:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-01 07:42:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-01 07:42:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-05-01 07:42:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-01 07:42:52,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-01 07:42:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:42:52,734 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-01 07:42:52,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 07:42:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-01 07:42:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-01 07:42:52,737 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:42:52,737 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:42:52,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 07:42:52,737 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:42:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:42:52,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1251247646, now seen corresponding path program 2 times [2021-05-01 07:42:52,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:42:52,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120073675] [2021-05-01 07:42:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:42:52,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:52,751 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i~0_12 v_main_~n~0_9) InVars {main_~i~0=v_main_~i~0_12, main_~n~0=v_main_~n~0_9} OutVars{main_~i~0=v_main_~i~0_12, main_~n~0=v_main_~n~0_9} AuxVars[] AssignedVars[] [2021-05-01 07:42:52,762 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.7 percent of original size [2021-05-01 07:42:52,767 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,776 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,780 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:42:52,781 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:42:52,784 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:42:52,789 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,793 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,796 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,799 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,803 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,807 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,810 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,812 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,815 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,816 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.7 percent of original size 61 [2021-05-01 07:42:52,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,835 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-05-01 07:42:52,835 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:42:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:52,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:42:52,890 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,891 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-01 07:42:52,903 INFO L142 QuantifierPusher]: treesize reduction 175, result has 20.5 percent of original size [2021-05-01 07:42:52,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-05-01 07:42:52,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:42:52,922 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:42:52,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:42:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:42:52,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:52,958 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 07:42:52,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:52,963 INFO L147 QuantifierPusher]: treesize reduction 7, result has 88.1 percent of original size 52 [2021-05-01 07:42:53,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:53,021 INFO L147 QuantifierPusher]: treesize reduction 2, result has 96.7 percent of original size 58 [2021-05-01 07:42:53,050 INFO L142 QuantifierPusher]: treesize reduction 5, result has 82.1 percent of original size [2021-05-01 07:42:53,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 07:42:53,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:53,071 INFO L147 QuantifierPusher]: treesize reduction 3, result has 80.0 percent of original size 12 [2021-05-01 07:42:53,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:42:53,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:42:53,092 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:42:53,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120073675] [2021-05-01 07:42:53,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1120073675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:42:53,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:42:53,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 07:42:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127423808] [2021-05-01 07:42:53,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 07:42:53,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:42:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 07:42:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-01 07:42:53,094 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 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 07:42:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:42:53,608 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-05-01 07:42:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-01 07:42:53,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 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 17 [2021-05-01 07:42:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:42:53,608 INFO L225 Difference]: With dead ends: 24 [2021-05-01 07:42:53,609 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 07:42:53,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-05-01 07:42:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 07:42:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 07:42:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-01 07:42:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 07:42:53,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-01 07:42:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:42:53,610 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 07:42:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 9 states have internal predecessors, (13), 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 07:42:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 07:42:53,610 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 07:42:53,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 07:42:53,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 07:42:53,977 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-01 07:42:53,977 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-01 07:42:53,977 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-01 07:42:53,977 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 7 9) no Hoare annotation was computed. [2021-05-01 07:42:53,978 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-01 07:42:53,978 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-01 07:42:53,978 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 17 34) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 17 34) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: true [2021-05-01 07:42:53,978 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 34) the Hoare annotation is: true [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 31) the Hoare annotation is: (or (and (= main_~k~0 (* (div main_~k~0 2) 2)) (or (and (<= 1 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (= main_~i~0 0))) (= (* (div main_~j~0 2) 2) main_~j~0)) [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 31) the Hoare annotation is: (and (= main_~k~0 (* (div main_~k~0 2) 2)) (or (and (<= 1 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (= main_~i~0 0))) [2021-05-01 07:42:53,979 INFO L201 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: true [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L22-2(lines 22 26) the Hoare annotation is: (or (and (<= 1 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (= main_~i~0 0)) [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L22-3(lines 22 26) the Hoare annotation is: (or (and (<= 1 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (= main_~i~0 0) (= (* (div main_~j~0 2) 2) main_~j~0)) [2021-05-01 07:42:53,979 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 15) the Hoare annotation is: true [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point L11(lines 11 13) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 07:42:53,979 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 10 15) the Hoare annotation is: true [2021-05-01 07:42:53,979 INFO L201 CegarLoopUtils]: At program point L11-2(lines 10 15) the Hoare annotation is: true [2021-05-01 07:42:53,979 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:42:53,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 07:42:53 BoogieIcfgContainer [2021-05-01 07:42:53,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 07:42:53,995 INFO L168 Benchmark]: Toolchain (without parser) took 3326.87 ms. Allocated memory was 183.5 MB in the beginning and 245.4 MB in the end (delta: 61.9 MB). Free memory was 149.5 MB in the beginning and 194.9 MB in the end (delta: -45.4 MB). Peak memory consumption was 119.5 MB. Max. memory is 8.0 GB. [2021-05-01 07:42:53,995 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 07:42:53,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.39 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 139.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-01 07:42:53,996 INFO L168 Benchmark]: Boogie Preprocessor took 62.14 ms. Allocated memory is still 183.5 MB. Free memory was 139.8 MB in the beginning and 167.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-01 07:42:53,996 INFO L168 Benchmark]: RCFGBuilder took 294.16 ms. Allocated memory is still 183.5 MB. Free memory was 167.3 MB in the beginning and 153.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 07:42:53,996 INFO L168 Benchmark]: TraceAbstraction took 2798.10 ms. Allocated memory was 183.5 MB in the beginning and 245.4 MB in the end (delta: 61.9 MB). Free memory was 152.6 MB in the beginning and 194.9 MB in the end (delta: -42.3 MB). Peak memory consumption was 122.3 MB. Max. memory is 8.0 GB. [2021-05-01 07:42:53,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 166.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 166.39 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 139.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.14 ms. Allocated memory is still 183.5 MB. Free memory was 139.8 MB in the beginning and 167.3 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 294.16 ms. Allocated memory is still 183.5 MB. Free memory was 167.3 MB in the beginning and 153.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2798.10 ms. Allocated memory was 183.5 MB in the beginning and 245.4 MB in the end (delta: 61.9 MB). Free memory was 152.6 MB in the beginning and 194.9 MB in the end (delta: -42.3 MB). Peak memory consumption was 122.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2327.0ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 13.7ms, AutomataDifference: 1021.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 365.2ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 68 SDslu, 75 SDs, 0 SdLazy, 170 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 184.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 968.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 22 LocationsWithAnnotation, 46 PreInvPairs, 75 NumberOfFragments, 153 HoareAnnotationTreeSize, 46 FomulaSimplifications, 168 FormulaSimplificationTreeSizeReduction, 84.4ms HoareSimplificationTime, 22 FomulaSimplificationsInter, 1178 FormulaSimplificationTreeSizeReductionInter, 268.2ms HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (1 <= i && i <= 2 * (i / 2)) || i == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (k == k / 2 * 2 && ((1 <= i && i <= 2 * (i / 2)) || i == 0)) || j / 2 * 2 == j - ProcedureContractResult [Line: 17]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...