/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:48:08,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:48:08,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:48:08,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:48:08,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:48:08,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:48:08,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:48:08,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:48:08,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:48:08,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:48:08,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:48:08,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:48:08,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:48:08,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:48:08,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:48:08,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:48:08,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:48:08,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:48:08,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:48:08,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:48:08,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:48:08,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:48:08,986 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:48:08,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:48:08,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:48:09,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:48:09,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:48:09,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:48:09,012 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:48:09,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:48:09,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:48:09,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:48:09,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:48:09,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:48:09,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:48:09,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:48:09,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:48:09,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:48:09,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:48:09,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:48:09,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:48:09,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:48:09,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:48:09,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:48:09,042 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:48:09,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:48:09,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:48:09,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:48:09,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:48:09,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:48:09,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:48:09,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:48:09,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:48:09,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:48:09,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:48:09,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:48:09,535 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:48:09,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2021-02-23 18:48:09,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb611443/dc075c3c36294181895296c91acba63e/FLAG2c4d3ccc7 [2021-02-23 18:48:10,316 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:48:10,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2021-02-23 18:48:10,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb611443/dc075c3c36294181895296c91acba63e/FLAG2c4d3ccc7 [2021-02-23 18:48:10,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fb611443/dc075c3c36294181895296c91acba63e [2021-02-23 18:48:10,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:48:10,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:48:10,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:10,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:48:10,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:48:10,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b0ce6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10, skipping insertion in model container [2021-02-23 18:48:10,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:48:10,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:48:10,885 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2021-02-23 18:48:10,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:10,906 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:48:10,918 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i[808,821] [2021-02-23 18:48:10,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:48:10,937 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:48:10,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10 WrapperNode [2021-02-23 18:48:10,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:48:10,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:48:10,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:48:10,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:48:10,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (1/1) ... [2021-02-23 18:48:10,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:48:10,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:48:10,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:48:10,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:48:10,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (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 [2021-02-23 18:48:11,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:48:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:48:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:48:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:48:11,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:48:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:48:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:48:11,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 18:48:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 18:48:11,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:48:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:48:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:48:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-23 18:48:11,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:48:11,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:48:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:48:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:48:11,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:48:11,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:48:11,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:48:11,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:48:11,409 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:48:11,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:11 BoogieIcfgContainer [2021-02-23 18:48:11,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:48:11,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:48:11,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:48:11,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:48:11,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:48:10" (1/3) ... [2021-02-23 18:48:11,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b46b559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:11, skipping insertion in model container [2021-02-23 18:48:11,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:48:10" (2/3) ... [2021-02-23 18:48:11,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b46b559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:48:11, skipping insertion in model container [2021-02-23 18:48:11,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:48:11" (3/3) ... [2021-02-23 18:48:11,467 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2021-02-23 18:48:11,480 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:48:11,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:48:11,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:48:11,553 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:48:11,553 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:48:11,553 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:48:11,553 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:48:11,554 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:48:11,554 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:48:11,554 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:48:11,557 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:48:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-02-23 18:48:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:48:11,617 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:11,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:11,622 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2011116622, now seen corresponding path program 1 times [2021-02-23 18:48:11,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:11,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036546423] [2021-02-23 18:48:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:11,770 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:11,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:11,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:11,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:11,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:12,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036546423] [2021-02-23 18:48:12,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:12,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:48:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717287316] [2021-02-23 18:48:12,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:48:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:12,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:48:12,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:12,084 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2021-02-23 18:48:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:12,168 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-02-23 18:48:12,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:48:12,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-23 18:48:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:12,179 INFO L225 Difference]: With dead ends: 45 [2021-02-23 18:48:12,179 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 18:48:12,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:48:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 18:48:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-23 18:48:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-23 18:48:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-02-23 18:48:12,229 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-02-23 18:48:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:12,229 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-02-23 18:48:12,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:48:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-02-23 18:48:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 18:48:12,231 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:12,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:12,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:48:12,232 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1998187328, now seen corresponding path program 1 times [2021-02-23 18:48:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:12,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035461118] [2021-02-23 18:48:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:12,237 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:48:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:12,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 18:48:12,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:12,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:12,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:12,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:12,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:12,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035461118] [2021-02-23 18:48:12,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:12,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 18:48:12,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141362326] [2021-02-23 18:48:12,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 18:48:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 18:48:12,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:48:12,399 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 6 states. [2021-02-23 18:48:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:12,597 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-02-23 18:48:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:48:12,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-23 18:48:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:12,600 INFO L225 Difference]: With dead ends: 38 [2021-02-23 18:48:12,600 INFO L226 Difference]: Without dead ends: 33 [2021-02-23 18:48:12,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:48:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-23 18:48:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-02-23 18:48:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 18:48:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-02-23 18:48:12,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2021-02-23 18:48:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:12,615 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-02-23 18:48:12,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 18:48:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-02-23 18:48:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 18:48:12,616 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:12,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:12,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:48:12,617 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1751069704, now seen corresponding path program 1 times [2021-02-23 18:48:12,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:12,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129622505] [2021-02-23 18:48:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:14,765 WARN L141 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size [2021-02-23 18:48:14,810 WARN L147 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size 100 [2021-02-23 18:48:14,811 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-23 18:48:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:14,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:14,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:14,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:14,911 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:48:14,914 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 18:48:14,915 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 18:48:14,926 WARN L141 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size [2021-02-23 18:48:14,927 WARN L147 QuantifierPusher]: treesize reduction 48, result has 34.2 percent of original size 25 [2021-02-23 18:48:14,944 WARN L141 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size [2021-02-23 18:48:14,945 WARN L147 QuantifierPusher]: treesize reduction 41, result has 29.3 percent of original size 17 [2021-02-23 18:48:14,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:14,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:14,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:14,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:48:14,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:14,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:14,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:48:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:48:15,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:48:15,049 WARN L141 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size [2021-02-23 18:48:15,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:15,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:48:15,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:15,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:48:15,086 WARN L147 QuantifierPusher]: treesize reduction 3, result has 98.1 percent of original size 157 [2021-02-23 18:48:15,190 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-23 18:48:15,281 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:15,289 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:48:15,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:48:15,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:48:15,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 90 [2021-02-23 18:48:15,402 WARN L141 QuantifierPusher]: treesize reduction 3, result has 94.5 percent of original size [2021-02-23 18:48:15,406 WARN L147 QuantifierPusher]: treesize reduction 3, result has 94.5 percent of original size 52 [2021-02-23 18:48:15,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 18:48:15,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-23 18:48:15,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-02-23 18:48:15,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 18:48:15,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:48:15,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:48:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129622505] [2021-02-23 18:48:15,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:48:15,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 18:48:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740464126] [2021-02-23 18:48:15,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 18:48:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:48:15,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 18:48:15,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-23 18:48:15,799 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2021-02-23 18:48:16,594 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-02-23 18:48:16,747 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-02-23 18:48:16,941 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-02-23 18:48:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:48:17,081 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-02-23 18:48:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-23 18:48:17,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-02-23 18:48:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:48:17,083 INFO L225 Difference]: With dead ends: 57 [2021-02-23 18:48:17,084 INFO L226 Difference]: Without dead ends: 38 [2021-02-23 18:48:17,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-02-23 18:48:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-23 18:48:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-02-23 18:48:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-23 18:48:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-02-23 18:48:17,097 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2021-02-23 18:48:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:48:17,098 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-02-23 18:48:17,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 18:48:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-02-23 18:48:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 18:48:17,099 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:48:17,099 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:48:17,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:48:17,100 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:48:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:48:17,101 INFO L82 PathProgramCache]: Analyzing trace with hash -702778622, now seen corresponding path program 1 times [2021-02-23 18:48:17,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:48:17,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342440253] [2021-02-23 18:48:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:48:19,185 WARN L141 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size [2021-02-23 18:48:19,202 WARN L147 QuantifierPusher]: treesize reduction 67, result has 59.9 percent of original size 100 [2021-02-23 18:48:21,274 WARN L141 QuantifierPusher]: treesize reduction 48, result has 61.3 percent of original size [2021-02-23 18:48:21,278 WARN L147 QuantifierPusher]: treesize reduction 48, result has 61.3 percent of original size 76 [2021-02-23 18:48:21,279 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:48:23,353 WARN L141 QuantifierPusher]: treesize reduction 64, result has 60.2 percent of original size [2021-02-23 18:48:23,359 WARN L147 QuantifierPusher]: treesize reduction 64, result has 60.2 percent of original size 97 [2021-02-23 18:48:23,360 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:48:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:23,397 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:48:23,423 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:48:23,447 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:48:23,447 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:48:23,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:48:23,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:48:23 BoogieIcfgContainer [2021-02-23 18:48:23,462 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:48:23,464 INFO L168 Benchmark]: Toolchain (without parser) took 12787.22 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.6 MB in the beginning and 68.3 MB in the end (delta: 59.3 MB). Peak memory consumption was 90.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:23,465 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:48:23,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.94 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:23,466 INFO L168 Benchmark]: Boogie Preprocessor took 35.86 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:23,467 INFO L168 Benchmark]: RCFGBuilder took 445.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:23,468 INFO L168 Benchmark]: TraceAbstraction took 12031.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.9 MB in the beginning and 68.3 MB in the end (delta: 65.6 MB). Peak memory consumption was 96.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:48:23,471 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.94 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.86 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 445.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12031.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.9 MB in the beginning and 68.3 MB in the end (delta: 65.6 MB). Peak memory consumption was 96.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i<10 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=n [L25] COND FALSE !(i<10) [L24] i++ [L24] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 102 SDslu, 104 SDs, 0 SdLazy, 200 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...