/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/loops/for_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:52:24,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:52:24,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:52:24,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:52:24,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:52:24,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:52:24,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:52:24,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:52:24,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:52:24,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:52:24,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:52:24,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:52:24,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:52:24,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:52:24,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:52:24,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:52:24,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:52:24,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:52:24,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:52:24,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:52:24,310 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 [2021-02-23 13:52:24,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:52:24,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:52:24,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:52:24,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:52:24,338 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:52:24,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:52:24,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:52:24,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:52:24,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:52:24,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:52:24,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:52:24,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:52:24,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:52:24,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:52:24,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:52:24,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:52:24,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:52:24,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:52:24,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:52:24,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:52:24,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:52:24,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:52:24,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:52:24,343 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:52:24,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:52:24,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:52:24,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:52:24,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:52:24,736 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:52:24,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c [2021-02-23 13:52:24,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57ba8b9a/c8bc8319e26e4a8db7835c15b272e729/FLAG03e6b7c02 [2021-02-23 13:52:25,567 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:52:25,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c [2021-02-23 13:52:25,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57ba8b9a/c8bc8319e26e4a8db7835c15b272e729/FLAG03e6b7c02 [2021-02-23 13:52:25,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57ba8b9a/c8bc8319e26e4a8db7835c15b272e729 [2021-02-23 13:52:25,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:52:25,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:52:25,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:25,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:52:25,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:52:25,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2b2d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25, skipping insertion in model container [2021-02-23 13:52:25,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:52:25,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:52:25,897 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c[418,431] [2021-02-23 13:52:25,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:25,930 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:52:25,945 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c[418,431] [2021-02-23 13:52:25,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:25,966 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:52:25,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25 WrapperNode [2021-02-23 13:52:25,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:25,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:52:25,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:52:25,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:52:25,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:26,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:26,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:26,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:52:26,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:52:26,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:52:26,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:52:26,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (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 13:52:26,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:52:26,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:52:26,118 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:52:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 13:52:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 13:52:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:52:26,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:52:26,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:52:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:52:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:52:26,122 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 13:52:26,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 13:52:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:52:26,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:52:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:52:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:52:26,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:52:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:52:26,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:52:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:52:26,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:52:26,484 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:52:26,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:26 BoogieIcfgContainer [2021-02-23 13:52:26,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:52:26,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:52:26,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:52:26,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:52:26,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:52:25" (1/3) ... [2021-02-23 13:52:26,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181dadae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:26, skipping insertion in model container [2021-02-23 13:52:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (2/3) ... [2021-02-23 13:52:26,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181dadae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:26, skipping insertion in model container [2021-02-23 13:52:26,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:26" (3/3) ... [2021-02-23 13:52:26,513 INFO L111 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_1.c [2021-02-23 13:52:26,527 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:52:26,532 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:52:26,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:52:26,607 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:52:26,607 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:52:26,607 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:52:26,608 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:52:26,608 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:52:26,608 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:52:26,608 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:52:26,608 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:52:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-02-23 13:52:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 13:52:26,664 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:26,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:26,668 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -782341743, now seen corresponding path program 1 times [2021-02-23 13:52:26,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:26,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537846869] [2021-02-23 13:52:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:26,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,125 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 13:52:27,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537846869] [2021-02-23 13:52:27,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:27,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:52:27,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392260792] [2021-02-23 13:52:27,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:52:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:52:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:52:27,152 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2021-02-23 13:52:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:27,209 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-02-23 13:52:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:52:27,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-02-23 13:52:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:27,219 INFO L225 Difference]: With dead ends: 34 [2021-02-23 13:52:27,219 INFO L226 Difference]: Without dead ends: 16 [2021-02-23 13:52:27,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:52:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-02-23 13:52:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-02-23 13:52:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-02-23 13:52:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-02-23 13:52:27,263 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2021-02-23 13:52:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:27,264 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-02-23 13:52:27,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:52:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-02-23 13:52:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 13:52:27,265 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:27,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:27,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:52:27,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:27,267 INFO L82 PathProgramCache]: Analyzing trace with hash -780554283, now seen corresponding path program 1 times [2021-02-23 13:52:27,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:27,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244732900] [2021-02-23 13:52:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:52:27,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,362 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,406 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,407 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,408 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 13:52:27,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244732900] [2021-02-23 13:52:27,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:27,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:52:27,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050478127] [2021-02-23 13:52:27,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:52:27,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:27,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:52:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:52:27,413 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2021-02-23 13:52:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:27,548 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-02-23 13:52:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:52:27,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-02-23 13:52:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:27,549 INFO L225 Difference]: With dead ends: 16 [2021-02-23 13:52:27,549 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:52:27,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:52:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:52:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:52:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:52:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:52:27,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-02-23 13:52:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:27,552 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:52:27,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:52:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:52:27,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:52:27,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:52:27,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:52:27,665 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:52:27,665 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:52:27,665 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:52:27,665 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:52:27,666 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:52:27,666 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:52:27,666 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:52:27,666 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:52:27,666 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:52:27,667 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:52:27,667 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-02-23 13:52:27,667 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-23 13:52:27,667 INFO L189 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-02-23 13:52:27,667 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-02-23 13:52:27,668 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 18 28) the Hoare annotation is: true [2021-02-23 13:52:27,668 INFO L185 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (= main_~x~0 0) [2021-02-23 13:52:27,668 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 18 28) no Hoare annotation was computed. [2021-02-23 13:52:27,668 INFO L189 CegarLoopUtils]: For program point L25-1(lines 23 26) no Hoare annotation was computed. [2021-02-23 13:52:27,668 INFO L189 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-02-23 13:52:27,669 INFO L185 CegarLoopUtils]: At program point L23-2(lines 23 26) the Hoare annotation is: (= main_~x~0 0) [2021-02-23 13:52:27,669 INFO L185 CegarLoopUtils]: At program point L23-3(lines 23 26) the Hoare annotation is: false [2021-02-23 13:52:27,669 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 18 28) no Hoare annotation was computed. [2021-02-23 13:52:27,669 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 14) the Hoare annotation is: true [2021-02-23 13:52:27,670 INFO L189 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-02-23 13:52:27,670 INFO L189 CegarLoopUtils]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-02-23 13:52:27,670 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 14) no Hoare annotation was computed. [2021-02-23 13:52:27,670 INFO L189 CegarLoopUtils]: For program point L10-2(lines 9 14) no Hoare annotation was computed. [2021-02-23 13:52:27,671 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-02-23 13:52:27,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:52:27 BoogieIcfgContainer [2021-02-23 13:52:27,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:52:27,691 INFO L168 Benchmark]: Toolchain (without parser) took 2078.15 ms. Allocated memory is still 166.7 MB. Free memory was 142.3 MB in the beginning and 80.0 MB in the end (delta: 62.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:27,692 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 166.7 MB. Free memory was 137.6 MB in the beginning and 137.5 MB in the end (delta: 98.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:52:27,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.05 ms. Allocated memory is still 166.7 MB. Free memory was 141.2 MB in the beginning and 131.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:27,694 INFO L168 Benchmark]: Boogie Preprocessor took 36.96 ms. Allocated memory is still 166.7 MB. Free memory was 131.8 MB in the beginning and 130.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:27,695 INFO L168 Benchmark]: RCFGBuilder took 480.83 ms. Allocated memory is still 166.7 MB. Free memory was 130.3 MB in the beginning and 116.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:27,696 INFO L168 Benchmark]: TraceAbstraction took 1197.05 ms. Allocated memory is still 166.7 MB. Free memory was 115.9 MB in the beginning and 80.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:27,700 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 166.7 MB. Free memory was 137.6 MB in the beginning and 137.5 MB in the end (delta: 98.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.05 ms. Allocated memory is still 166.7 MB. Free memory was 141.2 MB in the beginning and 131.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.96 ms. Allocated memory is still 166.7 MB. Free memory was 131.8 MB in the beginning and 130.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 480.83 ms. Allocated memory is still 166.7 MB. Free memory was 130.3 MB in the beginning and 116.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1197.05 ms. Allocated memory is still 166.7 MB. Free memory was 115.9 MB in the beginning and 80.0 MB in the end (delta: 35.9 MB). Peak memory consumption was 36.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 24 SDslu, 19 SDs, 0 SdLazy, 25 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 42 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1034 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...