/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:27:28,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:27:28,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:27:28,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:27:28,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:27:28,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:27:28,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:27:28,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:27:28,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:27:28,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:27:28,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:27:28,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:27:28,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:27:28,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:27:28,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:27:28,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:27:28,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:27:28,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:27:28,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:27:28,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:27:28,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 01:27:28,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:27:28,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:27:28,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:27:28,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:27:28,334 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:27:28,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:27:28,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:27:28,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:27:28,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:27:28,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:27:28,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:27:28,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:27:28,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:27:28,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:27:28,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:27:28,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:27:28,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:27:28,651 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:27:28,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-06 01:27:28,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11285195/822eb40ec2354c658d74f63f3d911868/FLAG43ecf3547 [2021-05-06 01:27:29,077 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:27:29,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-06 01:27:29,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11285195/822eb40ec2354c658d74f63f3d911868/FLAG43ecf3547 [2021-05-06 01:27:29,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a11285195/822eb40ec2354c658d74f63f3d911868 [2021-05-06 01:27:29,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:27:29,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:27:29,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:27:29,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:27:29,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:27:29,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ded8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29, skipping insertion in model container [2021-05-06 01:27:29,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:27:29,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:27:29,219 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c[597,610] [2021-05-06 01:27:29,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:27:29,238 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:27:29,245 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c[597,610] [2021-05-06 01:27:29,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:27:29,258 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:27:29,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29 WrapperNode [2021-05-06 01:27:29,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:27:29,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:27:29,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:27:29,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:27:29,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... [2021-05-06 01:27:29,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:27:29,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:27:29,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:27:29,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:27:29,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:27:29,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:27:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:27:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:27:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:27:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:27:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:27:29,375 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:27:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:27:29,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:27:29,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:27:29,636 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:27:29,637 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 01:27:29,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:27:29 BoogieIcfgContainer [2021-05-06 01:27:29,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:27:29,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:27:29,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:27:29,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:27:29,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:27:29" (1/3) ... [2021-05-06 01:27:29,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d544316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:27:29, skipping insertion in model container [2021-05-06 01:27:29,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:27:29" (2/3) ... [2021-05-06 01:27:29,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d544316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:27:29, skipping insertion in model container [2021-05-06 01:27:29,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:27:29" (3/3) ... [2021-05-06 01:27:29,643 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.c [2021-05-06 01:27:29,646 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:27:29,649 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:27:29,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:27:29,672 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:27:29,672 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:27:29,672 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:27:29,672 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:27:29,672 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:27:29,672 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:27:29,672 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:27:29,672 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:27:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:27:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:27:29,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:29,684 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:29,685 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-06 01:27:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:29,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078879369] [2021-05-06 01:27:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:29,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:27:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:29,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:27:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:29,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 01:27:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:27:29,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:29,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078879369] [2021-05-06 01:27:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078879369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:27:29,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:27:29,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:27:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636976810] [2021-05-06 01:27:29,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:27:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:29,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:27:29,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:27:29,858 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:27:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:27:29,932 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-06 01:27:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:27:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 01:27:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:27:29,939 INFO L225 Difference]: With dead ends: 57 [2021-05-06 01:27:29,939 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 01:27:29,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:27:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 01:27:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 01:27:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:27:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 01:27:29,967 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-06 01:27:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:27:29,968 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 01:27:29,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:27:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 01:27:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:27:29,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:29,969 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:29,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:27:29,969 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-06 01:27:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:29,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376026042] [2021-05-06 01:27:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:30,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:27:30,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095678735] [2021-05-06 01:27:30,011 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 [2021-05-06 01:27:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:30,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:27:30,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:27:30,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:27:30,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376026042] [2021-05-06 01:27:30,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:27:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095678735] [2021-05-06 01:27:30,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095678735] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:27:30,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:27:30,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:27:30,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028005937] [2021-05-06 01:27:30,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:27:30,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:27:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:27:30,230 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:27:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:27:30,289 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-05-06 01:27:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:27:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 01:27:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:27:30,290 INFO L225 Difference]: With dead ends: 39 [2021-05-06 01:27:30,290 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:27:30,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:27:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:27:30,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 01:27:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 01:27:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 01:27:30,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-06 01:27:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:27:30,298 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 01:27:30,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:27:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 01:27:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:27:30,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:30,299 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:30,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:27:30,511 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2021-05-06 01:27:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:30,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651053041] [2021-05-06 01:27:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:30,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:27:30,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587916250] [2021-05-06 01:27:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 01:27:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 01:27:30,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:27:30,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 01:27:30,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:30,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651053041] [2021-05-06 01:27:30,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:27:30,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587916250] [2021-05-06 01:27:30,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587916250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:27:30,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:27:30,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 01:27:30,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910956776] [2021-05-06 01:27:30,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 01:27:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 01:27:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:27:30,822 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:27:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:27:30,960 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-06 01:27:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:27:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 01:27:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:27:30,962 INFO L225 Difference]: With dead ends: 48 [2021-05-06 01:27:30,962 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 01:27:30,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-06 01:27:30,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 01:27:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 01:27:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:27:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 01:27:30,982 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-06 01:27:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:27:30,982 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 01:27:30,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:27:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 01:27:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:27:30,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:30,984 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:31,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:27:31,193 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2021-05-06 01:27:31,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:31,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237494730] [2021-05-06 01:27:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:31,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:27:31,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96017286] [2021-05-06 01:27:31,202 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 [2021-05-06 01:27:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 01:27:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:27:31,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:27:31,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237494730] [2021-05-06 01:27:31,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:27:31,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96017286] [2021-05-06 01:27:31,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96017286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:27:31,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:27:31,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 01:27:31,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326181704] [2021-05-06 01:27:31,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:27:31,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:27:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:27:31,394 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:27:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:27:31,496 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-06 01:27:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:27:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 01:27:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:27:31,498 INFO L225 Difference]: With dead ends: 56 [2021-05-06 01:27:31,498 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 01:27:31,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:27:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 01:27:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-06 01:27:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 01:27:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-06 01:27:31,504 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-06 01:27:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:27:31,504 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-06 01:27:31,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:27:31,504 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-06 01:27:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 01:27:31,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:31,505 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:31,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:27:31,726 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2021-05-06 01:27:31,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:31,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288806084] [2021-05-06 01:27:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:31,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:27:31,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063073250] [2021-05-06 01:27:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:27:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:27:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 01:27:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:27:31,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:31,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 01:27:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288806084] [2021-05-06 01:27:32,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:27:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063073250] [2021-05-06 01:27:32,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063073250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:27:32,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:27:32,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 01:27:32,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504385557] [2021-05-06 01:27:32,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 01:27:32,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 01:27:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 01:27:32,050 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:27:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:27:32,226 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 01:27:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 01:27:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-06 01:27:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:27:32,228 INFO L225 Difference]: With dead ends: 61 [2021-05-06 01:27:32,228 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 01:27:32,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 01:27:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 01:27:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-06 01:27:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:27:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 01:27:32,235 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-06 01:27:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:27:32,235 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 01:27:32,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:27:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 01:27:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 01:27:32,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:27:32,236 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:27:32,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:27:32,441 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:27:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:27:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 2 times [2021-05-06 01:27:32,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:27:32,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047406105] [2021-05-06 01:27:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:27:32,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:27:32,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663350360] [2021-05-06 01:27:32,449 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:27:32,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:27:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:27:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 01:27:32,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:27:32,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:27:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 01:27:32,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:27:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047406105] [2021-05-06 01:27:32,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:27:32,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663350360] [2021-05-06 01:27:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663350360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:27:32,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:27:32,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 01:27:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712028725] [2021-05-06 01:27:32,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 01:27:32,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:27:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 01:27:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:27:32,851 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:28:18,519 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-06 01:28:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:26,275 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-06 01:28:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 01:28:26,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-06 01:28:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:26,277 INFO L225 Difference]: With dead ends: 55 [2021-05-06 01:28:26,277 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 01:28:26,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 01:28:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 01:28:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 01:28:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 01:28:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 01:28:26,278 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-06 01:28:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 01:28:26,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:28:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 01:28:26,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 01:28:26,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 01:28:26,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 01:28:26,645 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 01:28:26,645 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:28:26,645 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-06 01:28:26,646 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (or (and (<= 0 main_~Y~0) (<= main_~Y~0 50)) (and (= main_~yx~0 0) (= (+ main_~v~0 main_~X~0) (* main_~Y~0 2)) (= main_~y~0 0) (= main_~x~0 0) (= main_~xy~0 0))) [2021-05-06 01:28:26,647 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-06 01:28:26,648 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 47) the Hoare annotation is: (and (<= 0 main_~Y~0) (<= main_~Y~0 50)) [2021-05-06 01:28:26,649 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 main_~Y~0) (<= main_~Y~0 50)) [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:28:26,649 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-06 01:28:26,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:28:26 BoogieIcfgContainer [2021-05-06 01:28:26,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:28:26,659 INFO L168 Benchmark]: Toolchain (without parser) took 57561.62 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 166.6 MB in the beginning and 109.9 MB in the end (delta: 56.7 MB). Peak memory consumption was 98.3 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 156.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L168 Benchmark]: Boogie Preprocessor took 37.94 ms. Allocated memory is still 202.4 MB. Free memory was 156.4 MB in the beginning and 184.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L168 Benchmark]: RCFGBuilder took 340.53 ms. Allocated memory is still 202.4 MB. Free memory was 184.4 MB in the beginning and 168.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L168 Benchmark]: TraceAbstraction took 57020.41 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 168.1 MB in the beginning and 109.9 MB in the end (delta: 58.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:26,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 157.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 156.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.94 ms. Allocated memory is still 202.4 MB. Free memory was 156.4 MB in the beginning and 184.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.53 ms. Allocated memory is still 202.4 MB. Free memory was 184.4 MB in the beginning and 168.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 57020.41 ms. Allocated memory was 202.4 MB in the beginning and 243.3 MB in the end (delta: 40.9 MB). Free memory was 168.1 MB in the beginning and 109.9 MB in the end (delta: 58.2 MB). Peak memory consumption was 100.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 56808.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 8.7ms, AutomataDifference: 54005.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 165.3ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 148 SDtfs, 102 SDslu, 666 SDs, 0 SdLazy, 759 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53164.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1128.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 40 NumberOfFragments, 80 HoareAnnotationTreeSize, 24 FomulaSimplifications, 1070 FormulaSimplificationTreeSizeReduction, 50.6ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 497 FormulaSimplificationTreeSizeReductionInter, 108.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 45.7ms SsaConstructionTime, 134.3ms SatisfiabilityAnalysisTime, 1220.8ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 936 SizeOfPredicates, 23 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 42/60 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 <= Y && Y <= 50 RESULT: Ultimate proved your program to be correct! Received shutdown request...