/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/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:44:19,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:44:19,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:44:19,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:44:19,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:44:19,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:44:19,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:44:19,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:44:19,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:44:19,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:44:19,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:44:19,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:44:19,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:44:19,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:44:19,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:44:19,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:44:19,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:44:19,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:44:19,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:44:19,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:44:19,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:44:19,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:44:19,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:44:19,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:44:19,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:44:19,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:44:19,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:44:19,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:44:19,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:44:19,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:44:19,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:44:19,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:44:19,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:44:19,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:44:19,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:44:19,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:44:19,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:44:19,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:44:19,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:44:19,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:44:19,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:44:19,237 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 [2020-10-23 18:44:19,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:44:19,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:44:19,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:44:19,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:44:19,308 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:44:19,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:44:19,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:44:19,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:44:19,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:44:19,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:44:19,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:44:19,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:44:19,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:44:19,312 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:44:19,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:44:19,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:44:19,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:44:19,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:44:19,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:44:19,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:44:19,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:44:19,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:44:19,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:44:19,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:44:19,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:44:19,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:44:19,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:44:19,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:44:19,316 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:44:19,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:44:19,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:44:19,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:44:19,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:44:19,833 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:44:19,834 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:44:19,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-23 18:44:19,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce56a89a/8d16746f43fa4087b7f01b943420b7b3/FLAG815e11d22 [2020-10-23 18:44:20,614 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:44:20,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-10-23 18:44:20,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce56a89a/8d16746f43fa4087b7f01b943420b7b3/FLAG815e11d22 [2020-10-23 18:44:20,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce56a89a/8d16746f43fa4087b7f01b943420b7b3 [2020-10-23 18:44:20,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:44:20,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:44:20,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:20,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:44:20,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:44:20,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:20" (1/1) ... [2020-10-23 18:44:20,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381d2c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:20, skipping insertion in model container [2020-10-23 18:44:20,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:20" (1/1) ... [2020-10-23 18:44:20,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:44:21,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:44:21,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:21,216 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:44:21,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:21,253 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:44:21,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21 WrapperNode [2020-10-23 18:44:21,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:21,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:44:21,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:44:21,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:44:21,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (1/1) ... [2020-10-23 18:44:21,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:44:21,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:44:21,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:44:21,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:44:21,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (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 [2020-10-23 18:44:21,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:44:21,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:44:21,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:44:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:44:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:44:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:44:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:44:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:44:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:44:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:44:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:44:21,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:44:21,640 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:44:21,640 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:44:21,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:21 BoogieIcfgContainer [2020-10-23 18:44:21,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:44:21,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:44:21,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:44:21,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:44:21,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:44:20" (1/3) ... [2020-10-23 18:44:21,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2499fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:21, skipping insertion in model container [2020-10-23 18:44:21,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:21" (2/3) ... [2020-10-23 18:44:21,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2499fa29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:21, skipping insertion in model container [2020-10-23 18:44:21,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:21" (3/3) ... [2020-10-23 18:44:21,691 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-10-23 18:44:21,707 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:44:21,713 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:44:21,731 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:44:21,765 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:44:21,765 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:44:21,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:44:21,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:44:21,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:44:21,766 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:44:21,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:44:21,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:44:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-23 18:44:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:44:21,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:21,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:21,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash -214259544, now seen corresponding path program 1 times [2020-10-23 18:44:21,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:21,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633229876] [2020-10-23 18:44:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:22,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633229876] [2020-10-23 18:44:22,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:22,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:44:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560239956] [2020-10-23 18:44:22,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:44:22,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:22,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:44:22,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:44:22,190 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-23 18:44:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:22,317 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-10-23 18:44:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:44:22,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-23 18:44:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:22,336 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:44:22,336 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:44:22,342 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 [2020-10-23 18:44:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:44:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:44:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:44:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-23 18:44:22,394 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-23 18:44:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:22,395 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-23 18:44:22,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:44:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-23 18:44:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-23 18:44:22,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:22,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:22,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:44:22,398 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1386865443, now seen corresponding path program 1 times [2020-10-23 18:44:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:22,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830668] [2020-10-23 18:44:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:22,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:22,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830668] [2020-10-23 18:44:22,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:22,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:44:22,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786118223] [2020-10-23 18:44:22,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:44:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:44:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:44:22,710 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2020-10-23 18:44:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:22,998 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-23 18:44:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:22,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-23 18:44:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:23,002 INFO L225 Difference]: With dead ends: 26 [2020-10-23 18:44:23,002 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:44:23,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:44:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-23 18:44:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:44:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-23 18:44:23,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-10-23 18:44:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:23,013 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-23 18:44:23,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:44:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-23 18:44:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 18:44:23,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:23,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:23,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:44:23,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:23,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1047281087, now seen corresponding path program 1 times [2020-10-23 18:44:23,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:23,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615285429] [2020-10-23 18:44:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615285429] [2020-10-23 18:44:23,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237594593] [2020-10-23 18:44:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:44:23,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:23,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:23,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:23,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-10-23 18:44:23,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117347426] [2020-10-23 18:44:23,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:44:23,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:23,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:44:23,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:44:23,578 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 15 states. [2020-10-23 18:44:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:24,198 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-23 18:44:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:44:24,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-10-23 18:44:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:24,200 INFO L225 Difference]: With dead ends: 33 [2020-10-23 18:44:24,200 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:44:24,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:44:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:44:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-10-23 18:44:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:44:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-23 18:44:24,208 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-23 18:44:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:24,208 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-23 18:44:24,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:44:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-23 18:44:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:44:24,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:24,209 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:24,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:44:24,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 862286429, now seen corresponding path program 2 times [2020-10-23 18:44:24,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:24,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006292728] [2020-10-23 18:44:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:24,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006292728] [2020-10-23 18:44:24,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431635369] [2020-10-23 18:44:24,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:24,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:44:24,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:44:24,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:44:24,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:24,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:25,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:25,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-10-23 18:44:25,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653307705] [2020-10-23 18:44:25,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:44:25,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:44:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:44:25,053 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 20 states. [2020-10-23 18:44:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:26,493 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-23 18:44:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:44:26,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2020-10-23 18:44:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:26,495 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:44:26,495 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:44:26,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:44:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:44:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-23 18:44:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:44:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-23 18:44:26,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-10-23 18:44:26,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:26,505 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-23 18:44:26,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:44:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-23 18:44:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:44:26,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:26,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:26,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:26,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2090481793, now seen corresponding path program 1 times [2020-10-23 18:44:26,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:26,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250284585] [2020-10-23 18:44:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250284585] [2020-10-23 18:44:27,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907935973] [2020-10-23 18:44:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:44:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:27,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:27,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:27,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-10-23 18:44:27,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803248799] [2020-10-23 18:44:27,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:44:27,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:27,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:44:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:44:27,457 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 23 states. [2020-10-23 18:44:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:29,085 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-23 18:44:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 18:44:29,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2020-10-23 18:44:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:29,086 INFO L225 Difference]: With dead ends: 35 [2020-10-23 18:44:29,087 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:29,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 18:44:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:29,089 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-23 18:44:29,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:29,090 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:29,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:44:29,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:29,090 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:29,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:29,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:29,597 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:29,597 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:29,597 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:29,597 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:29,598 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:29,598 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:29,598 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-23 18:44:29,598 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:29,598 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:29,598 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:29,599 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:29,599 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 40) the Hoare annotation is: true [2020-10-23 18:44:29,599 INFO L274 CegarLoopResult]: For program point L29(lines 29 35) no Hoare annotation was computed. [2020-10-23 18:44:29,600 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-23 18:44:29,600 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2020-10-23 18:44:29,600 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-10-23 18:44:29,600 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse1 (* 3 main_~n~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-10-23 18:44:29,600 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 40) no Hoare annotation was computed. [2020-10-23 18:44:29,600 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 40) no Hoare annotation was computed. [2020-10-23 18:44:29,600 INFO L274 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-10-23 18:44:29,601 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:29,601 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:29,601 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:29,601 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:44:29,602 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:29,602 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:29,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:29 BoogieIcfgContainer [2020-10-23 18:44:29,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:29,629 INFO L168 Benchmark]: Toolchain (without parser) took 8660.57 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 127.0 MB in the beginning and 160.9 MB in the end (delta: -34.0 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:29,630 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:29,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.32 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:29,640 INFO L168 Benchmark]: Boogie Preprocessor took 38.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:29,641 INFO L168 Benchmark]: RCFGBuilder took 373.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 134.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:29,642 INFO L168 Benchmark]: TraceAbstraction took 7945.73 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 134.6 MB in the beginning and 160.9 MB in the end (delta: -26.4 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:29,654 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 151.0 MB. Free memory was 124.0 MB in the beginning and 123.9 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.32 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 373.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 134.8 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7945.73 ms. Allocated memory was 151.0 MB in the beginning and 224.4 MB in the end (delta: 73.4 MB). Free memory was 134.6 MB in the beginning and 160.9 MB in the end (delta: -26.4 MB). Peak memory consumption was 47.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 112 SDslu, 191 SDs, 0 SdLazy, 626 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 27 PreInvPairs, 39 NumberOfFragments, 70 HoareAnnotationTreeSize, 27 FomulaSimplifications, 385 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 604 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 19133 SizeOfPredicates, 9 NumberOfNonLiveVariables, 316 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 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...