/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/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:47:17,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:47:17,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:47:17,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 18:47:17,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 18:47:17,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 18:47:17,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 18:47:17,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 18:47:17,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 18:47:17,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 18:47:17,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 18:47:17,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 18:47:17,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:47:17,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:47:17,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:47:17,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:47:17,936 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:47:17,937 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:47:17,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:47:17,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:47:17,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:47:17,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:47:17,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:47:17,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:47:17,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:47:17,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:47:17,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:47:17,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:47:17,974 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 18:47:17,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:47:17,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:47:17,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:47:17,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:47:17,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:47:17,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:47:17,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:47:17,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:47:17,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:47:17,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:47:17,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:47:17,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:47:17,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:47:17,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:47:17,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:47:17,995 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:47:17,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:47:17,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:47:17,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:47:17,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:47:17,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:47:17,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:47:17,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:47:18,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:47:18,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:47:18,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:47:18,408 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:47:18,409 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:47:18,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2021-02-23 18:47:18,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b1b35a4/6f05f76e87a14d3aaec1317f5687fda7/FLAG163b4413a [2021-02-23 18:47:19,135 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:47:19,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2021-02-23 18:47:19,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b1b35a4/6f05f76e87a14d3aaec1317f5687fda7/FLAG163b4413a [2021-02-23 18:47:19,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b1b35a4/6f05f76e87a14d3aaec1317f5687fda7 [2021-02-23 18:47:19,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:47:19,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:47:19,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:19,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:47:19,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:47:19,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fee3037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19, skipping insertion in model container [2021-02-23 18:47:19,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:47:19,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:47:19,842 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c[588,601] [2021-02-23 18:47:19,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:19,875 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:47:19,891 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c[588,601] [2021-02-23 18:47:19,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:47:19,921 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:47:19,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19 WrapperNode [2021-02-23 18:47:19,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:47:19,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:47:19,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:47:19,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:47:19,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:19,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:20,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:20,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (1/1) ... [2021-02-23 18:47:20,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:47:20,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:47:20,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:47:20,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:47:20,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (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 18:47:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:47:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:47:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:47:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 18:47:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 18:47:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:47:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:47:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:47:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:47:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:47:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 18:47:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 18:47:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:47:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 18:47:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:47:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 18:47:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:47:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:47:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:47:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:47:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:47:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:47:20,706 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:47:20,706 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-23 18:47:20,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:20 BoogieIcfgContainer [2021-02-23 18:47:20,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:47:20,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:47:20,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:47:20,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:47:20,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:47:19" (1/3) ... [2021-02-23 18:47:20,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d332db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:20, skipping insertion in model container [2021-02-23 18:47:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:47:19" (2/3) ... [2021-02-23 18:47:20,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d332db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:47:20, skipping insertion in model container [2021-02-23 18:47:20,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:47:20" (3/3) ... [2021-02-23 18:47:20,718 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2021-02-23 18:47:20,727 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:47:20,732 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:47:20,753 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:47:20,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:47:20,780 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:47:20,780 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:47:20,781 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:47:20,781 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:47:20,781 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:47:20,781 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:47:20,781 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:47:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-23 18:47:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:47:20,811 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:20,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:20,812 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 137751759, now seen corresponding path program 1 times [2021-02-23 18:47:20,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:20,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251313571] [2021-02-23 18:47:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:20,918 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,108 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 18:47:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,220 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,232 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 18:47:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251313571] [2021-02-23 18:47:21,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:21,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:47:21,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150133280] [2021-02-23 18:47:21,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:47:21,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:21,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:47:21,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:47:21,262 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-23 18:47:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:21,527 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-02-23 18:47:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:47:21,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-23 18:47:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:21,542 INFO L225 Difference]: With dead ends: 119 [2021-02-23 18:47:21,543 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 18:47:21,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:47:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 18:47:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-23 18:47:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-23 18:47:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-23 18:47:21,599 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 36 [2021-02-23 18:47:21,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:21,600 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-23 18:47:21,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:47:21,600 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-23 18:47:21,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 18:47:21,602 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:21,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:47:21,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:47:21,603 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:21,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1632327928, now seen corresponding path program 1 times [2021-02-23 18:47:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:21,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199723915] [2021-02-23 18:47:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:21,608 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:47:21,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:47:21,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 18:47:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:21,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:21,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:21,774 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 18:47:21,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199723915] [2021-02-23 18:47:21,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:21,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:47:21,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624542737] [2021-02-23 18:47:21,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:47:21,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:47:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:47:21,778 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2021-02-23 18:47:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:22,014 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-02-23 18:47:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:47:22,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-23 18:47:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:22,017 INFO L225 Difference]: With dead ends: 104 [2021-02-23 18:47:22,017 INFO L226 Difference]: Without dead ends: 79 [2021-02-23 18:47:22,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:47:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-23 18:47:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-23 18:47:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-23 18:47:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-23 18:47:22,038 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2021-02-23 18:47:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:22,038 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-23 18:47:22,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:47:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-23 18:47:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 18:47:22,041 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:22,041 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, 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 18:47:22,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:47:22,041 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash -881259695, now seen corresponding path program 1 times [2021-02-23 18:47:22,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:22,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509846298] [2021-02-23 18:47:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:22,069 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:22,071 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:22,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:22,302 WARN L141 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size [2021-02-23 18:47:22,303 WARN L147 QuantifierPusher]: treesize reduction 2, result has 83.3 percent of original size 10 [2021-02-23 18:47:22,307 WARN L141 QuantifierPusher]: treesize reduction 8, result has 52.9 percent of original size [2021-02-23 18:47:22,308 WARN L147 QuantifierPusher]: treesize reduction 8, result has 52.9 percent of original size 9 [2021-02-23 18:47:22,318 WARN L141 QuantifierPusher]: treesize reduction 8, result has 65.2 percent of original size [2021-02-23 18:47:22,319 WARN L147 QuantifierPusher]: treesize reduction 8, result has 65.2 percent of original size 15 [2021-02-23 18:47:22,340 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-23 18:47:22,341 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-23 18:47:22,363 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-23 18:47:22,365 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-23 18:47:22,386 WARN L141 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size [2021-02-23 18:47:22,389 WARN L147 QuantifierPusher]: treesize reduction 8, result has 72.4 percent of original size 21 [2021-02-23 18:47:22,417 WARN L141 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size [2021-02-23 18:47:22,421 WARN L147 QuantifierPusher]: treesize reduction 7, result has 84.1 percent of original size 37 [2021-02-23 18:47:22,456 WARN L141 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size [2021-02-23 18:47:22,458 WARN L147 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size 25 [2021-02-23 18:47:22,474 WARN L141 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size [2021-02-23 18:47:22,476 WARN L147 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size 25 [2021-02-23 18:47:22,507 WARN L141 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size [2021-02-23 18:47:22,509 WARN L147 QuantifierPusher]: treesize reduction 7, result has 78.1 percent of original size 25 [2021-02-23 18:47:22,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 18:47:22,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 18:47:22,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 18:47:22,632 WARN L141 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size [2021-02-23 18:47:22,635 WARN L147 QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24 [2021-02-23 18:47:22,662 WARN L141 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size [2021-02-23 18:47:22,663 WARN L147 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size 25 [2021-02-23 18:47:22,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:47:22,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 18:47:22,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:47:22,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:47:22,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,784 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:22,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:47:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:22,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:22,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-23 18:47:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:47:22,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:47:22,865 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:47:22,881 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 18:47:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509846298] [2021-02-23 18:47:22,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:47:22,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-02-23 18:47:22,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867358794] [2021-02-23 18:47:22,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-23 18:47:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:47:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-23 18:47:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-02-23 18:47:22,886 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2021-02-23 18:47:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:47:24,339 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-02-23 18:47:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-23 18:47:24,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-23 18:47:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:47:24,344 INFO L225 Difference]: With dead ends: 112 [2021-02-23 18:47:24,344 INFO L226 Difference]: Without dead ends: 106 [2021-02-23 18:47:24,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=328, Invalid=1154, Unknown=0, NotChecked=0, Total=1482 [2021-02-23 18:47:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-23 18:47:24,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-02-23 18:47:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-23 18:47:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-23 18:47:24,374 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 53 [2021-02-23 18:47:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:47:24,374 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-23 18:47:24,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-23 18:47:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-23 18:47:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-23 18:47:24,376 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:47:24,377 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, 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 18:47:24,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:47:24,377 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:47:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:47:24,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1326966967, now seen corresponding path program 1 times [2021-02-23 18:47:24,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:47:24,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234522467] [2021-02-23 18:47:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:47:24,384 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 18:47:24,385 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:47:24,403 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-23 18:47:24,403 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:47:24,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:47:24,436 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-23 18:47:24,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:47:24 BoogieIcfgContainer [2021-02-23 18:47:24,436 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:47:24,438 INFO L168 Benchmark]: Toolchain (without parser) took 4888.32 ms. Allocated memory was 159.4 MB in the beginning and 207.6 MB in the end (delta: 48.2 MB). Free memory was 134.8 MB in the beginning and 125.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:47:24,439 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:47:24,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.92 ms. Allocated memory is still 159.4 MB. Free memory was 133.7 MB in the beginning and 123.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:47:24,440 INFO L168 Benchmark]: Boogie Preprocessor took 87.39 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:47:24,441 INFO L168 Benchmark]: RCFGBuilder took 690.64 ms. Allocated memory is still 159.4 MB. Free memory was 122.0 MB in the beginning and 102.6 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:47:24,442 INFO L168 Benchmark]: TraceAbstraction took 3726.58 ms. Allocated memory was 159.4 MB in the beginning and 207.6 MB in the end (delta: 48.2 MB). Free memory was 102.1 MB in the beginning and 125.8 MB in the end (delta: -23.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. [2021-02-23 18:47:24,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 354.92 ms. Allocated memory is still 159.4 MB. Free memory was 133.7 MB in the beginning and 123.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.39 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 690.64 ms. Allocated memory is still 159.4 MB. Free memory was 122.0 MB in the beginning and 102.6 MB in the end (delta: 19.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3726.58 ms. Allocated memory was 159.4 MB in the beginning and 207.6 MB in the end (delta: 48.2 MB). Free memory was 102.1 MB in the beginning and 125.8 MB in the end (delta: -23.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 [L32] COND TRUE i