/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:11,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:11,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:11,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:11,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:11,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:11,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:11,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:11,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:11,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:11,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:11,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:11,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:11,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:11,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:11,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:11,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:11,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:11,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:11,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:11,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:11,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:11,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:11,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:11,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:11,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:11,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:11,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:11,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:11,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:11,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:11,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:11,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:11,339 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:11,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:11,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:11,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:11,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:11,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:11,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:11,340 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:11,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:11,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:11,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:11,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:11,829 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:11,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2021-02-24 00:16:11,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77fe9037/4c06cd2986a14608ae400a36d0a097cd/FLAG907c2ed75 [2021-02-24 00:16:12,582 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:12,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2021-02-24 00:16:12,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77fe9037/4c06cd2986a14608ae400a36d0a097cd/FLAG907c2ed75 [2021-02-24 00:16:12,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d77fe9037/4c06cd2986a14608ae400a36d0a097cd [2021-02-24 00:16:12,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:12,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:12,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:12,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:12,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:12,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:12" (1/1) ... [2021-02-24 00:16:12,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b82832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:12, skipping insertion in model container [2021-02-24 00:16:12,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:12" (1/1) ... [2021-02-24 00:16:12,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:13,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:16:13,156 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/s2iff.c[588,601] [2021-02-24 00:16:13,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:13,186 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:16:13,204 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/s2iff.c[588,601] [2021-02-24 00:16:13,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:16:13,231 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:16:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13 WrapperNode [2021-02-24 00:16:13,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:13,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:16:13,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:16:13,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:16:13,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (1/1) ... [2021-02-24 00:16:13,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:16:13,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:16:13,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:16:13,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:16:13,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (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 [2021-02-24 00:16:13,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:16:13,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:16:13,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:16:13,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:16:13,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:16:13,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:16:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:16:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:16:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:16:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:16:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:16:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:16:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:16:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-24 00:16:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:16:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-24 00:16:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:16:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:16:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:16:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:16:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:16:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:16:13,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:16:13,873 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 00:16:13,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:13 BoogieIcfgContainer [2021-02-24 00:16:13,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:16:13,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:16:13,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:16:13,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:16:13,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:12" (1/3) ... [2021-02-24 00:16:13,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8533cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:13, skipping insertion in model container [2021-02-24 00:16:13,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:13" (2/3) ... [2021-02-24 00:16:13,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8533cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:16:13, skipping insertion in model container [2021-02-24 00:16:13,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:16:13" (3/3) ... [2021-02-24 00:16:13,886 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-02-24 00:16:13,894 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:16:13,900 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:16:13,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:16:13,955 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:16:13,955 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:16:13,955 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:16:13,955 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:16:13,956 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:16:13,956 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:16:13,956 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:16:13,956 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:16:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2021-02-24 00:16:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:14,006 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:14,007 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] [2021-02-24 00:16:14,007 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:14,023 INFO L82 PathProgramCache]: Analyzing trace with hash 137751759, now seen corresponding path program 1 times [2021-02-24 00:16:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:14,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20397183] [2021-02-24 00:16:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:14,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20397183] [2021-02-24 00:16:14,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:14,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:16:14,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163575178] [2021-02-24 00:16:14,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:16:14,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:14,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:16:14,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:16:14,586 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2021-02-24 00:16:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:14,759 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-02-24 00:16:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:16:14,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2021-02-24 00:16:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:14,770 INFO L225 Difference]: With dead ends: 119 [2021-02-24 00:16:14,770 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 00:16:14,774 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 [2021-02-24 00:16:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 00:16:14,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-24 00:16:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 00:16:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-02-24 00:16:14,826 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 36 [2021-02-24 00:16:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:14,827 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-02-24 00:16:14,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:16:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-02-24 00:16:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 00:16:14,829 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:14,829 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] [2021-02-24 00:16:14,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:16:14,829 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:14,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1632327928, now seen corresponding path program 1 times [2021-02-24 00:16:14,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:14,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131953220] [2021-02-24 00:16:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:14,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:16:14,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:14,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:14,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:14,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131953220] [2021-02-24 00:16:14,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:16:14,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 00:16:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675205765] [2021-02-24 00:16:14,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 00:16:14,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 00:16:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 00:16:14,976 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2021-02-24 00:16:15,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:15,219 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-02-24 00:16:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 00:16:15,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2021-02-24 00:16:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:15,221 INFO L225 Difference]: With dead ends: 104 [2021-02-24 00:16:15,222 INFO L226 Difference]: Without dead ends: 79 [2021-02-24 00:16:15,223 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 [2021-02-24 00:16:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-24 00:16:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-02-24 00:16:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-02-24 00:16:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-02-24 00:16:15,239 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 36 [2021-02-24 00:16:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:15,239 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-02-24 00:16:15,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 00:16:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-02-24 00:16:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 00:16:15,241 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:15,242 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] [2021-02-24 00:16:15,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:16:15,242 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash -881259695, now seen corresponding path program 1 times [2021-02-24 00:16:15,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:15,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813980753] [2021-02-24 00:16:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,379 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:16:15,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:15,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 00:16:15,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 00:16:15,420 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:16:15,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,440 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 00:16:15,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:15,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:15,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,502 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:15,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-24 00:16:15,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:16:15,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,591 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-24 00:16:15,629 WARN L141 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size [2021-02-24 00:16:15,631 WARN L147 QuantifierPusher]: treesize reduction 5, result has 83.3 percent of original size 25 [2021-02-24 00:16:15,660 WARN L141 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-02-24 00:16:15,665 WARN L147 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size 40 [2021-02-24 00:16:15,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 00:16:15,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 00:16:15,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:15,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:16:15,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:16:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 00:16:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:16:15,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:16:15,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:16:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:16:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813980753] [2021-02-24 00:16:15,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:16:15,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-02-24 00:16:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280498797] [2021-02-24 00:16:15,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-24 00:16:15,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:16:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-24 00:16:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-24 00:16:15,881 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2021-02-24 00:16:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:16:17,141 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-02-24 00:16:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-24 00:16:17,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-02-24 00:16:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:16:17,145 INFO L225 Difference]: With dead ends: 112 [2021-02-24 00:16:17,146 INFO L226 Difference]: Without dead ends: 106 [2021-02-24 00:16:17,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-02-24 00:16:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-24 00:16:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-02-24 00:16:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-02-24 00:16:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-02-24 00:16:17,167 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 53 [2021-02-24 00:16:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:16:17,168 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-02-24 00:16:17,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-02-24 00:16:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-02-24 00:16:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 00:16:17,172 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:16:17,172 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] [2021-02-24 00:16:17,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:16:17,173 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:16:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:16:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1326966967, now seen corresponding path program 1 times [2021-02-24 00:16:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:16:17,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923012220] [2021-02-24 00:16:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:16:17,212 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-02-24 00:16:17,212 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 00:16:17,213 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:16:17,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:16:17,241 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 00:16:17,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:16:17 BoogieIcfgContainer [2021-02-24 00:16:17,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:16:17,243 INFO L168 Benchmark]: Toolchain (without parser) took 4285.70 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 132.2 MB in the beginning and 82.6 MB in the end (delta: 49.6 MB). Peak memory consumption was 82.6 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:17,244 INFO L168 Benchmark]: CDTParser took 2.22 ms. Allocated memory is still 155.2 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:16:17,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.40 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:17,245 INFO L168 Benchmark]: Boogie Preprocessor took 78.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:17,246 INFO L168 Benchmark]: RCFGBuilder took 562.57 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 134.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:17,247 INFO L168 Benchmark]: TraceAbstraction took 3364.32 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 133.8 MB in the beginning and 82.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 83.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:16:17,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.22 ms. Allocated memory is still 155.2 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 261.40 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 562.57 ms. Allocated memory is still 155.2 MB. Free memory was 119.4 MB in the beginning and 134.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3364.32 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 133.8 MB in the beginning and 82.6 MB in the end (delta: 51.2 MB). Peak memory consumption was 83.7 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