/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-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:53,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:53,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:53,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:53,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:53,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:53,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:53,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:53,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:53,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:53,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:53,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:53,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:53,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:53,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:53,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:53,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:53,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:53,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:53,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:53,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:53,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:53,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:53,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:53,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:43:53,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:43:53,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:43:53,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:43:53,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:43:53,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:43:53,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:43:53,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:43:53,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:43:53,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:43:53,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:43:53,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:43:53,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:43:53,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:43:53,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:53,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:53,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:53,567 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 18:43:53,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:53,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:53,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:53,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:53,597 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:53,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:53,598 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:53,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:53,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:53,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:53,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:53,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:53,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:53,599 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:53,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:53,600 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:53,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:53,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:53,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:53,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:53,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:53,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:53,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:53,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:53,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:53,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:53,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:53,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:53,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:53,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:54,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:54,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:54,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:54,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:54,092 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:54,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-10-23 18:43:54,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99545ce84/30924f3bdb3c47e89718b84eb13f8cca/FLAG0e331fed9 [2020-10-23 18:43:54,799 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:54,800 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2020-10-23 18:43:54,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99545ce84/30924f3bdb3c47e89718b84eb13f8cca/FLAG0e331fed9 [2020-10-23 18:43:55,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99545ce84/30924f3bdb3c47e89718b84eb13f8cca [2020-10-23 18:43:55,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:55,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:55,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:55,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:55,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:55,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13a6d944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55, skipping insertion in model container [2020-10-23 18:43:55,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:55,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:55,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:55,407 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:55,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:55,470 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:55,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55 WrapperNode [2020-10-23 18:43:55,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:55,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:55,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:55,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:55,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:55,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:55,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:55,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:55,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (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 18:43:55,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:55,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:55,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:55,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:43:55,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:55,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:55,616 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:55,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:55,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:43:55,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:55,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:55,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:55,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:56,167 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:56,168 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 18:43:56,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:56 BoogieIcfgContainer [2020-10-23 18:43:56,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:56,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:56,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:56,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:56,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:55" (1/3) ... [2020-10-23 18:43:56,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e1d364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:56, skipping insertion in model container [2020-10-23 18:43:56,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (2/3) ... [2020-10-23 18:43:56,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e1d364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:56, skipping insertion in model container [2020-10-23 18:43:56,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:56" (3/3) ... [2020-10-23 18:43:56,180 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2020-10-23 18:43:56,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:56,204 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:56,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:56,267 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:56,267 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:56,267 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:56,268 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:56,268 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:56,268 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:56,268 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:56,268 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:56,300 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-23 18:43:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:56,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:56,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:56,309 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1366579838, now seen corresponding path program 1 times [2020-10-23 18:43:56,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:56,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947064098] [2020-10-23 18:43:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:56,763 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 18:43:56,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947064098] [2020-10-23 18:43:56,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:56,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:56,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957777923] [2020-10-23 18:43:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:56,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:56,791 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2020-10-23 18:43:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:57,730 INFO L93 Difference]: Finished difference Result 95 states and 165 transitions. [2020-10-23 18:43:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:57,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:43:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:57,742 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:43:57,743 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:43:57,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:43:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-23 18:43:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:43:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-10-23 18:43:57,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 16 [2020-10-23 18:43:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:57,826 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-10-23 18:43:57,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-10-23 18:43:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:57,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:57,828 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 991427645, now seen corresponding path program 1 times [2020-10-23 18:43:57,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219040433] [2020-10-23 18:43:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,966 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 18:43:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219040433] [2020-10-23 18:43:57,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:57,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887457087] [2020-10-23 18:43:57,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:57,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:57,970 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 6 states. [2020-10-23 18:43:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:58,543 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-23 18:43:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:58,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:43:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:58,548 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:43:58,548 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 18:43:58,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 18:43:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-23 18:43:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:43:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2020-10-23 18:43:58,566 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 16 [2020-10-23 18:43:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:58,566 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2020-10-23 18:43:58,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:58,567 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2020-10-23 18:43:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:43:58,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:58,568 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:58,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:58,568 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1753581165, now seen corresponding path program 1 times [2020-10-23 18:43:58,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:58,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392913117] [2020-10-23 18:43:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:43:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392913117] [2020-10-23 18:43:58,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:58,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213233465] [2020-10-23 18:43:58,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:58,748 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand 6 states. [2020-10-23 18:43:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:59,352 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-23 18:43:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:59,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-23 18:43:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:59,355 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:43:59,355 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 18:43:59,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 18:43:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 18:43:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:43:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-10-23 18:43:59,372 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 21 [2020-10-23 18:43:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:59,372 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-10-23 18:43:59,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-10-23 18:43:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-23 18:43:59,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:59,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:59,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:59,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:59,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1424654691, now seen corresponding path program 1 times [2020-10-23 18:43:59,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519126614] [2020-10-23 18:43:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:43:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:43:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:43:59,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519126614] [2020-10-23 18:43:59,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:59,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:43:59,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894214401] [2020-10-23 18:43:59,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:59,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:59,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:59,504 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 7 states. [2020-10-23 18:44:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:00,257 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-10-23 18:44:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:00,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-23 18:44:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:00,260 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:44:00,261 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:44:00,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:44:00,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-23 18:44:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 18:44:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-23 18:44:00,278 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 26 [2020-10-23 18:44:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:00,278 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-23 18:44:00,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-23 18:44:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:44:00,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:00,280 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:00,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:44:00,281 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2015933906, now seen corresponding path program 1 times [2020-10-23 18:44:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:00,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553042575] [2020-10-23 18:44:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:44:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:44:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:44:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:44:00,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553042575] [2020-10-23 18:44:00,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:00,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904338182] [2020-10-23 18:44:00,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:00,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:00,435 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 6 states. [2020-10-23 18:44:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:01,036 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-23 18:44:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:01,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-23 18:44:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:01,040 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:44:01,041 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 18:44:01,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 18:44:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-23 18:44:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:44:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-23 18:44:01,075 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 31 [2020-10-23 18:44:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:01,075 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-23 18:44:01,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-23 18:44:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-23 18:44:01,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:01,078 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:01,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:44:01,078 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:01,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1351997886, now seen corresponding path program 1 times [2020-10-23 18:44:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:01,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485170637] [2020-10-23 18:44:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:44:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:44:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:44:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:44:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 18:44:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:44:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:44:01,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485170637] [2020-10-23 18:44:01,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:01,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:01,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690749184] [2020-10-23 18:44:01,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:01,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:01,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:01,274 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 7 states. [2020-10-23 18:44:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:02,068 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-10-23 18:44:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:02,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-23 18:44:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:02,072 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:44:02,072 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 18:44:02,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 18:44:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-10-23 18:44:02,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 18:44:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-23 18:44:02,089 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 49 [2020-10-23 18:44:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:02,089 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-23 18:44:02,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-23 18:44:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 18:44:02,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:02,092 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:02,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:44:02,092 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1469062878, now seen corresponding path program 1 times [2020-10-23 18:44:02,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:02,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073724743] [2020-10-23 18:44:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:44:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:44:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:44:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:44:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 18:44:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:44:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 18:44:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:44:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-23 18:44:02,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073724743] [2020-10-23 18:44:02,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:02,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:44:02,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203882680] [2020-10-23 18:44:02,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:44:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:44:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:44:02,339 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 8 states. [2020-10-23 18:44:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:03,168 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-10-23 18:44:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:03,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-23 18:44:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:03,172 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:44:03,172 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 18:44:03,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:44:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 18:44:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-23 18:44:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:44:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-23 18:44:03,206 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 59 [2020-10-23 18:44:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:03,208 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-23 18:44:03,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:44:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-23 18:44:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-23 18:44:03,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:03,212 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:03,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:44:03,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -463998120, now seen corresponding path program 1 times [2020-10-23 18:44:03,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:03,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52425293] [2020-10-23 18:44:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:44:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:44:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:44:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:44:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 18:44:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:44:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 18:44:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-23 18:44:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 18:44:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 18:44:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-23 18:44:03,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52425293] [2020-10-23 18:44:03,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:03,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:44:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435268160] [2020-10-23 18:44:03,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:44:03,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:44:03,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:03,433 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 9 states. [2020-10-23 18:44:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:04,250 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-10-23 18:44:04,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:44:04,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-23 18:44:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:04,253 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:44:04,253 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:04,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:44:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:04,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-10-23 18:44:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:04,257 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:04,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:44:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:04,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:04,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:44:04,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:04,668 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2020-10-23 18:44:05,362 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-10-23 18:44:05,873 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:05,873 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:05,873 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:05,874 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:05,874 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:05,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:05,874 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 18:44:05,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:05,874 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:05,875 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:05,875 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:05,875 INFO L270 CegarLoopResult]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,876 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-23 18:44:05,876 INFO L274 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-10-23 18:44:05,876 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2020-10-23 18:44:05,876 INFO L270 CegarLoopResult]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,876 INFO L270 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,876 INFO L270 CegarLoopResult]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,876 INFO L270 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,877 INFO L270 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,877 INFO L270 CegarLoopResult]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,877 INFO L274 CegarLoopResult]: For program point L36(lines 36 63) no Hoare annotation was computed. [2020-10-23 18:44:05,877 INFO L270 CegarLoopResult]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,877 INFO L274 CegarLoopResult]: For program point L53(line 53) no Hoare annotation was computed. [2020-10-23 18:44:05,877 INFO L274 CegarLoopResult]: For program point L49(line 49) no Hoare annotation was computed. [2020-10-23 18:44:05,878 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,878 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,878 INFO L270 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,878 INFO L270 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,878 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,879 INFO L270 CegarLoopResult]: At program point L46-1(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,879 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2020-10-23 18:44:05,879 INFO L270 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,879 INFO L274 CegarLoopResult]: For program point L38(line 38) no Hoare annotation was computed. [2020-10-23 18:44:05,879 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,879 INFO L274 CegarLoopResult]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2020-10-23 18:44:05,879 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2020-10-23 18:44:05,880 INFO L270 CegarLoopResult]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,880 INFO L270 CegarLoopResult]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2020-10-23 18:44:05,880 INFO L274 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-10-23 18:44:05,880 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-23 18:44:05,880 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:05,880 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:05,880 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:05,881 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:44:05,881 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:05,881 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:05,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:05 BoogieIcfgContainer [2020-10-23 18:44:05,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:05,900 INFO L168 Benchmark]: Toolchain (without parser) took 10758.88 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.1 MB in the beginning and 149.0 MB in the end (delta: -21.9 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:05,900 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:05,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:05,902 INFO L168 Benchmark]: Boogie Preprocessor took 43.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:05,903 INFO L168 Benchmark]: RCFGBuilder took 653.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 130.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:05,904 INFO L168 Benchmark]: TraceAbstraction took 9725.94 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 130.1 MB in the beginning and 149.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:05,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 151.0 MB. Free memory is still 125.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 324.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 653.25 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 130.6 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9725.94 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 130.1 MB in the beginning and 149.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 122.2 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: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i < len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 300 SDtfs, 254 SDslu, 514 SDs, 0 SdLazy, 1185 SolverSat, 492 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 25 LocationsWithAnnotation, 96 PreInvPairs, 117 NumberOfFragments, 388 HoareAnnotationTreeSize, 96 FomulaSimplifications, 3224 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 25 FomulaSimplificationsInter, 697 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 288 NumberOfCodeBlocks, 288 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 32882 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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...