/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s52iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:25:34,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:25:34,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:25:34,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:25:34,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:25:34,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:25:34,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:25:34,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:25:34,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:25:34,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:25:34,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:25:34,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:25:34,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:25:34,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:25:34,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:25:34,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:25:34,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:25:34,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:25:34,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:25:34,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:25:34,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:25:34,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:25:34,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:25:34,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:25:34,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:25:34,623 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:25:34,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:25:34,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:25:34,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:25:34,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:25:34,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:25:34,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:25:34,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:25:34,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:25:34,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:25:34,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:25:34,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:25:34,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:25:34,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:25:34,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:25:34,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:25:34,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:25:34,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:25:34,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:25:34,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:25:34,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:25:34,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:25:34,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:25:34,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:25:34,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:25:35,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:25:35,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:25:35,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:25:35,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:25:35,070 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:25:35,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s52iff.c [2021-02-21 16:25:35,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb5db22/e76d9dc3ccb14f859608be71912e4d89/FLAGa1fc09f1b [2021-02-21 16:25:35,752 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:25:35,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s52iff.c [2021-02-21 16:25:35,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb5db22/e76d9dc3ccb14f859608be71912e4d89/FLAGa1fc09f1b [2021-02-21 16:25:36,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abb5db22/e76d9dc3ccb14f859608be71912e4d89 [2021-02-21 16:25:36,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:25:36,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:25:36,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:25:36,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:25:36,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:25:36,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d4bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36, skipping insertion in model container [2021-02-21 16:25:36,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:25:36,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:25:36,304 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/s52iff.c[589,602] [2021-02-21 16:25:36,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:25:36,337 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:25:36,352 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/s52iff.c[589,602] [2021-02-21 16:25:36,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:25:36,382 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:25:36,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36 WrapperNode [2021-02-21 16:25:36,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:25:36,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:25:36,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:25:36,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:25:36,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (1/1) ... [2021-02-21 16:25:36,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:25:36,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:25:36,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:25:36,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:25:36,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (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 [2021-02-21 16:25:36,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:25:36,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:25:36,553 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:25:36,554 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:25:36,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 16:25:36,554 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:25:36,554 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:25:36,555 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:25:36,555 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:25:36,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:25:36,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 16:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:25:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:25:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:25:36,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:25:37,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:25:37,147 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 16:25:37,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:25:37 BoogieIcfgContainer [2021-02-21 16:25:37,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:25:37,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:25:37,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:25:37,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:25:37,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:25:36" (1/3) ... [2021-02-21 16:25:37,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341c081a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:25:37, skipping insertion in model container [2021-02-21 16:25:37,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:36" (2/3) ... [2021-02-21 16:25:37,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@341c081a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:25:37, skipping insertion in model container [2021-02-21 16:25:37,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:25:37" (3/3) ... [2021-02-21 16:25:37,158 INFO L111 eAbstractionObserver]: Analyzing ICFG s52iff.c [2021-02-21 16:25:37,166 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:25:37,170 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:25:37,193 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:25:37,223 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:25:37,223 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:25:37,223 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:25:37,223 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:25:37,224 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:25:37,224 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:25:37,224 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:25:37,224 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:25:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-21 16:25:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:25:37,250 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:37,251 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] [2021-02-21 16:25:37,251 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:37,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1742232210, now seen corresponding path program 1 times [2021-02-21 16:25:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331800761] [2021-02-21 16:25:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:37,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:37,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:37,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:37,556 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:37,684 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-21 16:25:37,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:37,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:37,730 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 16:25:37,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:37,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:37,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:37,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:37,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:37,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331800761] [2021-02-21 16:25:37,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:37,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:25:37,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101864482] [2021-02-21 16:25:37,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:25:37,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:25:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:25:37,796 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2021-02-21 16:25:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:38,032 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-02-21 16:25:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:25:38,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-21 16:25:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:38,043 INFO L225 Difference]: With dead ends: 62 [2021-02-21 16:25:38,043 INFO L226 Difference]: Without dead ends: 29 [2021-02-21 16:25:38,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:25:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-21 16:25:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-21 16:25:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-21 16:25:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-02-21 16:25:38,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2021-02-21 16:25:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:38,114 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-02-21 16:25:38,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:25:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-02-21 16:25:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:25:38,117 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:38,117 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] [2021-02-21 16:25:38,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:25:38,118 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 416194299, now seen corresponding path program 1 times [2021-02-21 16:25:38,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:38,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398607386] [2021-02-21 16:25:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:38,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:38,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:25:38,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:25:38,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:38,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:38,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:38,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-02-21 16:25:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:38,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:38,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:38,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398607386] [2021-02-21 16:25:38,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:38,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:25:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852293460] [2021-02-21 16:25:38,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:25:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:38,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:25:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:25:38,365 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2021-02-21 16:25:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:38,525 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-02-21 16:25:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:25:38,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2021-02-21 16:25:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:38,527 INFO L225 Difference]: With dead ends: 51 [2021-02-21 16:25:38,528 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 16:25:38,529 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 [2021-02-21 16:25:38,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 16:25:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-02-21 16:25:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-21 16:25:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-02-21 16:25:38,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-02-21 16:25:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:38,540 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-02-21 16:25:38,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:25:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-02-21 16:25:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 16:25:38,541 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:38,541 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] [2021-02-21 16:25:38,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:25:38,542 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -708797194, now seen corresponding path program 1 times [2021-02-21 16:25:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:38,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713100260] [2021-02-21 16:25:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:25:38,618 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:25:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:25:38,649 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:25:38,683 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:25:38,683 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:25:38,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:25:38,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:25:38 BoogieIcfgContainer [2021-02-21 16:25:38,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:25:38,735 INFO L168 Benchmark]: Toolchain (without parser) took 2630.36 ms. Allocated memory is still 156.2 MB. Free memory was 132.4 MB in the beginning and 59.6 MB in the end (delta: 72.9 MB). Peak memory consumption was 73.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:38,735 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:25:38,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 120.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:38,737 INFO L168 Benchmark]: Boogie Preprocessor took 47.27 ms. Allocated memory is still 156.2 MB. Free memory was 120.6 MB in the beginning and 119.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:38,738 INFO L168 Benchmark]: RCFGBuilder took 716.28 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 134.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:38,739 INFO L168 Benchmark]: TraceAbstraction took 1579.76 ms. Allocated memory is still 156.2 MB. Free memory was 134.0 MB in the beginning and 59.6 MB in the end (delta: 74.4 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:38,746 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 156.2 MB. Free memory is still 128.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.3 MB in the beginning and 120.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.27 ms. Allocated memory is still 156.2 MB. Free memory was 120.6 MB in the beginning and 119.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 716.28 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 134.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1579.76 ms. Allocated memory is still 156.2 MB. Free memory was 134.0 MB in the beginning and 59.6 MB in the end (delta: 74.4 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=51, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={3:0}] [L32] COND TRUE i