/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/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:36:35,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:36:35,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:36:35,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:36:35,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:36:35,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:36:35,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:36:35,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:36:35,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:36:35,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:36:35,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:36:35,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:36:35,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:36:35,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:36:35,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:36:35,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:36:35,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:36:35,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:36:35,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:36:35,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:36:35,137 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 02:36:35,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:36:35,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:36:35,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:36:35,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:36:35,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:36:35,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:36:35,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:36:35,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:36:35,166 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:36:35,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:36:35,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:36:35,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:36:35,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:36:35,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:36:35,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:36:35,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:36:35,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:36:35,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:36:35,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:36:35,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:36:35,447 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:36:35,448 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:36:35,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-06 02:36:35,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab09a3627/ba67cc594c36418791bb80ec45ce8299/FLAG1693af1b0 [2021-05-06 02:36:35,822 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:36:35,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-06 02:36:35,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab09a3627/ba67cc594c36418791bb80ec45ce8299/FLAG1693af1b0 [2021-05-06 02:36:36,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab09a3627/ba67cc594c36418791bb80ec45ce8299 [2021-05-06 02:36:36,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:36:36,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:36:36,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:36:36,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:36:36,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:36:36,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709b790c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36, skipping insertion in model container [2021-05-06 02:36:36,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:36:36,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:36:36,500 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/egcd3-ll_valuebound1.c[490,503] [2021-05-06 02:36:36,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:36:36,545 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:36:36,570 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/egcd3-ll_valuebound1.c[490,503] [2021-05-06 02:36:36,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:36:36,656 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:36:36,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36 WrapperNode [2021-05-06 02:36:36,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:36:36,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:36:36,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:36:36,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:36:36,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... [2021-05-06 02:36:36,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:36:36,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:36:36,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:36:36,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:36:36,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:36:36,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:36:36,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:36:36,846 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:36:36,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:36:36,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:36:36,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:36:36,847 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:36:36,848 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:36:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:36:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:36:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:36:36,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:36:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:36:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:36:36,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:36:36,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:36:36,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:36:36,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:36:36,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:36:36,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:36:37,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:36:37,284 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:36:37,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:36:37 BoogieIcfgContainer [2021-05-06 02:36:37,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:36:37,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:36:37,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:36:37,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:36:37,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:36:36" (1/3) ... [2021-05-06 02:36:37,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3b47bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:36:37, skipping insertion in model container [2021-05-06 02:36:37,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:36" (2/3) ... [2021-05-06 02:36:37,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e3b47bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:36:37, skipping insertion in model container [2021-05-06 02:36:37,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:36:37" (3/3) ... [2021-05-06 02:36:37,297 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.c [2021-05-06 02:36:37,301 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:36:37,304 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:36:37,315 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:36:37,339 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:36:37,339 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:36:37,339 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:36:37,339 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:36:37,339 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:36:37,339 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:36:37,339 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:36:37,340 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:36:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:36:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:36:37,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:37,355 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:37,356 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:37,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 02:36:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:37,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098395153] [2021-05-06 02:36:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:36:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:36:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:36:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:36:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:36:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:36:37,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098395153] [2021-05-06 02:36:37,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098395153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:37,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:37,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:36:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919956913] [2021-05-06 02:36:37,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:36:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:36:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:36:37,622 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:37,725 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 02:36:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:36:37,727 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:36:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:37,736 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:36:37,736 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:36:37,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:36:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:36:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:36:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:36:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 02:36:37,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 02:36:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:37,769 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 02:36:37,769 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 02:36:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:36:37,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:37,771 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:37,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:36:37,771 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 02:36:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:37,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916243914] [2021-05-06 02:36:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:37,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:37,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260007681] [2021-05-06 02:36:37,785 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 02:36:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:36:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:36:38,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:38,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916243914] [2021-05-06 02:36:38,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:38,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260007681] [2021-05-06 02:36:38,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260007681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:38,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:38,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:36:38,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687652782] [2021-05-06 02:36:38,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:36:38,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:36:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:38,054 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:38,128 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 02:36:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:36:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 02:36:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:38,131 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:36:38,132 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:36:38,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:36:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 02:36:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:36:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 02:36:38,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 02:36:38,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:38,140 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 02:36:38,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 02:36:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:36:38,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:38,141 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:38,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:36:38,359 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-06 02:36:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:38,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097952284] [2021-05-06 02:36:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:38,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:38,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644797878] [2021-05-06 02:36:38,370 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 02:36:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:38,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:38,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:38,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:38,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097952284] [2021-05-06 02:36:38,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:38,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644797878] [2021-05-06 02:36:38,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644797878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:38,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:38,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737301023] [2021-05-06 02:36:38,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:38,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:38,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:38,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:38,706 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:38,946 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:36:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:38,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 02:36:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:38,951 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:36:38,951 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 02:36:38,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 02:36:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-05-06 02:36:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:36:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 02:36:38,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 02:36:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:38,976 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 02:36:38,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 02:36:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:36:38,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:38,978 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:39,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:39,197 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-06 02:36:39,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:39,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217520556] [2021-05-06 02:36:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:39,207 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:39,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193152415] [2021-05-06 02:36:39,208 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 02:36:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:36:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:36:39,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217520556] [2021-05-06 02:36:39,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193152415] [2021-05-06 02:36:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193152415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:39,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806007364] [2021-05-06 02:36:39,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:39,363 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:39,536 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-06 02:36:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:36:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:36:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:39,537 INFO L225 Difference]: With dead ends: 103 [2021-05-06 02:36:39,538 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 02:36:39,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 02:36:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 02:36:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:36:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 02:36:39,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 02:36:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:39,550 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 02:36:39,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 02:36:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:36:39,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:39,551 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:39,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:39,769 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-06 02:36:39,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:39,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116154277] [2021-05-06 02:36:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:39,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:39,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759636604] [2021-05-06 02:36:39,792 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 02:36:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:39,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:40,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116154277] [2021-05-06 02:36:40,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:40,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759636604] [2021-05-06 02:36:40,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759636604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:40,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:40,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:40,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177560497] [2021-05-06 02:36:40,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:40,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:40,066 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:36:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:40,267 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-05-06 02:36:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:36:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:40,270 INFO L225 Difference]: With dead ends: 86 [2021-05-06 02:36:40,270 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:36:40,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:36:40,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 02:36:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:36:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 02:36:40,292 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 02:36:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:40,292 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 02:36:40,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:36:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 02:36:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:36:40,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:40,298 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:40,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:40,504 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:40,504 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-06 02:36:40,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195853555] [2021-05-06 02:36:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:40,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:40,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442526232] [2021-05-06 02:36:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:36:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:36:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:40,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:40,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195853555] [2021-05-06 02:36:40,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442526232] [2021-05-06 02:36:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442526232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:40,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276412252] [2021-05-06 02:36:40,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:40,676 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 02:36:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:40,780 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2021-05-06 02:36:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:36:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 42 [2021-05-06 02:36:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:40,782 INFO L225 Difference]: With dead ends: 102 [2021-05-06 02:36:40,782 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:36:40,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:36:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-05-06 02:36:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:36:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-05-06 02:36:40,795 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2021-05-06 02:36:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:40,795 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-05-06 02:36:40,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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 02:36:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-05-06 02:36:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:36:40,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:40,797 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:41,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:36:41,014 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-06 02:36:41,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:41,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719972473] [2021-05-06 02:36:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:41,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762537751] [2021-05-06 02:36:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:36:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:41,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:36:41,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:41,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719972473] [2021-05-06 02:36:41,170 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:41,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762537751] [2021-05-06 02:36:41,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762537751] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:41,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:41,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:36:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773338205] [2021-05-06 02:36:41,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:36:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:36:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:41,171 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:41,277 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-05-06 02:36:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:36:41,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 02:36:41,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:41,278 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:36:41,278 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:36:41,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:36:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-06 02:36:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:36:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-05-06 02:36:41,285 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 47 [2021-05-06 02:36:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:41,286 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-05-06 02:36:41,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-05-06 02:36:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:36:41,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:41,286 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:41,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:41,501 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-06 02:36:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927209766] [2021-05-06 02:36:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:41,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:41,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211626030] [2021-05-06 02:36:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:41,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:36:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927209766] [2021-05-06 02:36:41,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211626030] [2021-05-06 02:36:41,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211626030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:41,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:41,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:41,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669244160] [2021-05-06 02:36:41,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:41,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:41,718 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:36:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:41,852 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2021-05-06 02:36:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:36:41,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:36:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:41,854 INFO L225 Difference]: With dead ends: 117 [2021-05-06 02:36:41,854 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 02:36:41,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 02:36:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-05-06 02:36:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 02:36:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-05-06 02:36:41,864 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 52 [2021-05-06 02:36:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:41,864 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-05-06 02:36:41,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:36:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-05-06 02:36:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:36:41,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:41,865 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 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] [2021-05-06 02:36:42,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:42,081 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-06 02:36:42,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:42,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924794160] [2021-05-06 02:36:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:42,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:42,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343958523] [2021-05-06 02:36:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:36:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 02:36:42,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:42,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924794160] [2021-05-06 02:36:42,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343958523] [2021-05-06 02:36:42,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343958523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:42,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:42,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:36:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211630430] [2021-05-06 02:36:42,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:36:42,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:36:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:42,485 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:36:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:42,872 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2021-05-06 02:36:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:36:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 02:36:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:42,873 INFO L225 Difference]: With dead ends: 101 [2021-05-06 02:36:42,873 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 02:36:42,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 02:36:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2021-05-06 02:36:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:36:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2021-05-06 02:36:42,882 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 64 [2021-05-06 02:36:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:42,882 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2021-05-06 02:36:42,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:36:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2021-05-06 02:36:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:36:42,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:42,883 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2021-05-06 02:36:43,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:36:43,097 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1914971202, now seen corresponding path program 2 times [2021-05-06 02:36:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:43,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864239859] [2021-05-06 02:36:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:43,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:43,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124784453] [2021-05-06 02:36:43,114 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:43,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:36:43,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:43,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:36:43,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864239859] [2021-05-06 02:36:43,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124784453] [2021-05-06 02:36:43,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124784453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:43,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:43,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:36:43,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350742597] [2021-05-06 02:36:43,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:36:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:36:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:36:43,312 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:43,486 INFO L93 Difference]: Finished difference Result 189 states and 253 transitions. [2021-05-06 02:36:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:36:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 02:36:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:43,488 INFO L225 Difference]: With dead ends: 189 [2021-05-06 02:36:43,488 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 02:36:43,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 02:36:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 99. [2021-05-06 02:36:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.126984126984127) internal successors, (71), 64 states have internal predecessors, (71), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:36:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 02:36:43,504 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 69 [2021-05-06 02:36:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:43,505 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 02:36:43,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 02:36:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 02:36:43,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:43,506 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:43,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:43,724 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1205081507, now seen corresponding path program 1 times [2021-05-06 02:36:43,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:43,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98005276] [2021-05-06 02:36:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:43,731 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:43,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389114875] [2021-05-06 02:36:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:36:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-06 02:36:43,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98005276] [2021-05-06 02:36:43,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389114875] [2021-05-06 02:36:43,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389114875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:43,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:43,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:43,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224384487] [2021-05-06 02:36:43,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:43,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:43,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:43,948 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:36:44,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:44,080 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-06 02:36:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:36:44,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2021-05-06 02:36:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:44,081 INFO L225 Difference]: With dead ends: 99 [2021-05-06 02:36:44,082 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:36:44,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:36:44,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:36:44,083 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 02:36:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:36:44,084 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2021-05-06 02:36:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:44,084 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:36:44,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:36:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:36:44,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:36:44,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:44,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:36:44,618 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2021-05-06 02:36:45,155 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2021-05-06 02:36:45,372 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:36:45,373 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 02:36:45,373 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:36:45,373 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:36:45,373 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 1))) (or (and (= main_~r~0 0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (<= 1 main_~b~0) (<= 1 main_~y~0) .cse0 (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) (and (< (* 2 main_~c~0) 1) (= main_~p~0 0) (= main_~r~0 1) (<= 0 main_~c~0) (= (+ main_~p~0 main_~q~0) 1) (< main_~b~0 main_~a~0) (<= main_~a~0 main_~x~0) (<= 0 main_~b~0) .cse0 (= main_~a~0 main_~y~0) (= (+ main_~s~0 1) 0)))) [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (= main_~p~0 0) (= main_~r~0 1) (= (+ main_~p~0 main_~q~0) 1) (<= main_~a~0 main_~x~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~a~0 main_~y~0) (= (+ main_~s~0 1) 0)) [2021-05-06 02:36:45,374 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (and (= main_~q~0 0) (= main_~k~0 0) (<= main_~y~0 main_~a~0) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (<= main_~v~0 main_~c~0) (<= main_~c~0 main_~x~0) (= main_~r~0 0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:36:45,374 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,374 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:36:45,374 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (and (= main_~q~0 0) (= main_~k~0 0) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (<= main_~v~0 main_~c~0) (= main_~r~0 0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,374 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:36:45,374 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-06 02:36:45,375 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,375 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (= main_~q~0 0) (= main_~k~0 0) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (<= main_~v~0 main_~c~0) (= main_~r~0 0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,375 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (and (= main_~q~0 0) (= main_~k~0 0) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (<= main_~v~0 main_~c~0) (= main_~r~0 0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,375 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:36:45,375 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse1 (= main_~q~0 0)) (.cse0 (= main_~r~0 0)) (.cse2 (let ((.cse6 (<= main_~y~0 main_~b~0)) (.cse7 (= main_~a~0 main_~x~0)) (.cse8 (<= 1 main_~y~0))) (or (and .cse6 .cse7 .cse8 (<= main_~c~0 main_~a~0)) (and .cse6 .cse7 (<= main_~y~0 main_~a~0) .cse8)))) (.cse3 (<= main_~x~0 1)) (.cse4 (= main_~p~0 1)) (.cse5 (= main_~s~0 1))) (or (and .cse0 .cse1 (= main_~k~0 0) (= main_~b~0 main_~y~0) (= main_~c~0 main_~a~0) .cse2 .cse3 (<= 1 main_~a~0) .cse4 .cse5 (<= main_~y~0 1)) (and .cse1 (<= 1 main_~x~0) (<= main_~b~0 1) (<= 0 main_~c~0) .cse0 (< main_~c~0 main_~b~0) (= main_~k~0 1) (= main_~b~0 main_~v~0) (= main_~d~0 1) .cse2 .cse3 .cse4 .cse5))) [2021-05-06 02:36:45,375 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-06 02:36:45,375 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-06 02:36:45,375 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:36:45,375 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:36:45,375 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:36:45,375 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (and (= main_~q~0 0) (= main_~k~0 0) (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (<= main_~v~0 main_~c~0) (= main_~r~0 0) (= main_~b~0 main_~v~0) (<= 1 main_~y~0) (= main_~c~0 main_~a~0) (= main_~d~0 1) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-06 02:36:45,376 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:36:45,376 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:36:45,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:36:45 BoogieIcfgContainer [2021-05-06 02:36:45,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:36:45,388 INFO L168 Benchmark]: Toolchain (without parser) took 9107.15 ms. Allocated memory was 220.2 MB in the beginning and 326.1 MB in the end (delta: 105.9 MB). Free memory was 183.3 MB in the beginning and 283.5 MB in the end (delta: -100.2 MB). Peak memory consumption was 139.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 220.2 MB. Free memory is still 200.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.44 ms. Allocated memory is still 220.2 MB. Free memory was 183.0 MB in the beginning and 202.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L168 Benchmark]: Boogie Preprocessor took 52.28 ms. Allocated memory is still 220.2 MB. Free memory was 202.2 MB in the beginning and 200.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L168 Benchmark]: RCFGBuilder took 574.73 ms. Allocated memory is still 220.2 MB. Free memory was 200.7 MB in the beginning and 183.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L168 Benchmark]: TraceAbstraction took 8101.71 ms. Allocated memory was 220.2 MB in the beginning and 326.1 MB in the end (delta: 105.9 MB). Free memory was 182.8 MB in the beginning and 283.5 MB in the end (delta: -100.7 MB). Peak memory consumption was 139.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:45,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 220.2 MB. Free memory is still 200.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 374.44 ms. Allocated memory is still 220.2 MB. Free memory was 183.0 MB in the beginning and 202.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.28 ms. Allocated memory is still 220.2 MB. Free memory was 202.2 MB in the beginning and 200.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 574.73 ms. Allocated memory is still 220.2 MB. Free memory was 200.7 MB in the beginning and 183.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8101.71 ms. Allocated memory was 220.2 MB in the beginning and 326.1 MB in the end (delta: 105.9 MB). Free memory was 182.8 MB in the beginning and 283.5 MB in the end (delta: -100.7 MB). Peak memory consumption was 139.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6956.1ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 18.0ms, AutomataDifference: 1888.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1078.8ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 456 SDtfs, 523 SDslu, 1989 SDs, 0 SdLazy, 1544 SolverSat, 308 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 880.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1172.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=10, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 133.6ms AutomataMinimizationTime, 11 MinimizatonAttempts, 114 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 87 PreInvPairs, 100 NumberOfFragments, 512 HoareAnnotationTreeSize, 87 FomulaSimplifications, 10497 FormulaSimplificationTreeSizeReduction, 189.4ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 957 FormulaSimplificationTreeSizeReductionInter, 879.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 117.4ms SsaConstructionTime, 259.5ms SatisfiabilityAnalysisTime, 1903.3ms InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 2019 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1809 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 378/440 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: 35]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && q == 0) && 1 <= x) && a == x) && b <= 1) && 1 <= b) && 1 <= y) && x <= 1) && p == 1) && s == 1) && y <= 1) || ((((((((((2 * c < 1 && p == 0) && r == 1) && 0 <= c) && p + q == 1) && b < a) && a <= x) && 0 <= b) && x <= 1) && a == y) && s + 1 == 0) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && q == 0) && k == 0) && b == y) && c == a) && ((((y <= b && a == x) && 1 <= y) && c <= a) || (((y <= b && a == x) && y <= a) && 1 <= y))) && x <= 1) && 1 <= a) && p == 1) && s == 1) && y <= 1) || ((((((((((((q == 0 && 1 <= x) && b <= 1) && 0 <= c) && r == 0) && c < b) && k == 1) && b == v) && d == 1) && ((((y <= b && a == x) && 1 <= y) && c <= a) || (((y <= b && a == x) && y <= a) && 1 <= y))) && x <= 1) && p == 1) && s == 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((q == 0 && k == 0) && a <= x) && 1 <= b) && v <= c) && r == 0) && b == v) && 1 <= y) && c == a) && d == 1) && x <= 1) && p == 1) && s == 1) && y <= 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...