/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:53:47,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:53:47,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:53:47,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:53:47,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:53:47,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:53:47,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:53:47,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:53:47,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:53:47,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:53:47,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:53:47,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:53:47,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:53:47,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:53:47,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:53:47,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:53:47,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:53:47,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:53:47,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:53:47,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:53:47,289 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 [2021-05-02 13:53:47,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:53:47,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:53:47,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:53:47,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:53:47,308 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:53:47,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:53:47,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:53:47,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:53:47,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:53:47,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:53:47,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:53:47,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:53:47,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:53:47,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:53:47,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:53:47,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:53:47,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:53:47,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:53:47,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:53:47,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:53:47,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:53:47,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:53:47,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:53:47,568 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:53:47,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2021-05-02 13:53:47,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/399afd43d/3333df65e99d46c2b602d9c83bda32fa/FLAGd505eedff [2021-05-02 13:53:47,965 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:53:47,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c [2021-05-02 13:53:47,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/399afd43d/3333df65e99d46c2b602d9c83bda32fa/FLAGd505eedff [2021-05-02 13:53:47,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/399afd43d/3333df65e99d46c2b602d9c83bda32fa [2021-05-02 13:53:47,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:53:47,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:53:47,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:47,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:53:47,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:53:47,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:47" (1/1) ... [2021-05-02 13:53:47,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361ff0fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:47, skipping insertion in model container [2021-05-02 13:53:47,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:47" (1/1) ... [2021-05-02 13:53:47,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:53:48,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:53:48,077 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2021-05-02 13:53:48,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:48,094 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:53:48,129 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound1.c[597,610] [2021-05-02 13:53:48,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:48,144 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:53:48,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48 WrapperNode [2021-05-02 13:53:48,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:48,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:53:48,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:53:48,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:53:48,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (1/1) ... [2021-05-02 13:53:48,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:53:48,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:53:48,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:53:48,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:53:48,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (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 [2021-05-02 13:53:48,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:53:48,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:53:48,206 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:53:48,206 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:53:48,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:53:48,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:53:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:53:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:53:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:53:48,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:53:48,342 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:53:48,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:48 BoogieIcfgContainer [2021-05-02 13:53:48,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:53:48,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:53:48,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:53:48,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:53:48,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:53:47" (1/3) ... [2021-05-02 13:53:48,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a82ae07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:48, skipping insertion in model container [2021-05-02 13:53:48,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:48" (2/3) ... [2021-05-02 13:53:48,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a82ae07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:48, skipping insertion in model container [2021-05-02 13:53:48,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:48" (3/3) ... [2021-05-02 13:53:48,348 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound1.c [2021-05-02 13:53:48,351 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:53:48,353 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:53:48,363 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:53:48,378 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:53:48,378 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:53:48,378 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:53:48,378 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:53:48,378 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:53:48,378 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:53:48,378 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:53:48,378 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:53:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:53:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:53:48,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:48,391 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:48,391 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-02 13:53:48,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:48,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348223783] [2021-05-02 13:53:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:48,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:53:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:48,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:53:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:48,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 13:53:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:53:48,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:48,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348223783] [2021-05-02 13:53:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348223783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:53:48,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:53:48,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:53:48,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719921688] [2021-05-02 13:53:48,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:53:48,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:48,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:53:48,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:48,579 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:53:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:48,626 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-02 13:53:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:53:48,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 13:53:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:48,635 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:53:48,635 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:53:48,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:53:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 13:53:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:53:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 13:53:48,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-02 13:53:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 13:53:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:53:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 13:53:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:53:48,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:48,661 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:48,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:53:48,661 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-02 13:53:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:48,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298294516] [2021-05-02 13:53:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:48,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:48,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6294297] [2021-05-02 13:53:48,676 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 [2021-05-02 13:53:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:53:48,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:48,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:48,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:53:48,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:48,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298294516] [2021-05-02 13:53:48,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:48,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6294297] [2021-05-02 13:53:48,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6294297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:48,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:48,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:53:48,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230361064] [2021-05-02 13:53:48,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:53:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:48,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:53:48,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:53:48,960 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:53:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:49,073 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-05-02 13:53:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:53:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 13:53:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:49,075 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:53:49,075 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:53:49,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:53:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:53:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 13:53:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:53:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 13:53:49,088 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-02 13:53:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:49,090 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 13:53:49,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:53:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 13:53:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:53:49,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:49,095 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:49,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:53:49,305 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2021-05-02 13:53:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:49,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429488025] [2021-05-02 13:53:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:49,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:49,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530734186] [2021-05-02 13:53:49,324 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 [2021-05-02 13:53:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:53:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:53:49,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:49,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429488025] [2021-05-02 13:53:49,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:49,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530734186] [2021-05-02 13:53:49,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530734186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:53:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466681742] [2021-05-02 13:53:49,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:53:49,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:49,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:53:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:53:49,658 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:49,774 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-02 13:53:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:53:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 13:53:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:49,775 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:53:49,775 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:53:49,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:53:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:53:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:53:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:53:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-02 13:53:49,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-05-02 13:53:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:49,780 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-02 13:53:49,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-02 13:53:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:53:49,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:49,781 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:49,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:49,997 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2021-05-02 13:53:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:49,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548782923] [2021-05-02 13:53:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:50,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:50,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374871597] [2021-05-02 13:53:50,008 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 [2021-05-02 13:53:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:50,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:53:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:50,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:53:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548782923] [2021-05-02 13:53:50,242 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374871597] [2021-05-02 13:53:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374871597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:53:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752595869] [2021-05-02 13:53:50,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:53:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:53:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:53:50,243 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:50,360 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-05-02 13:53:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:53:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 13:53:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:50,362 INFO L225 Difference]: With dead ends: 59 [2021-05-02 13:53:50,362 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:53:50,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:53:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:53:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-05-02 13:53:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:53:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 13:53:50,367 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 32 [2021-05-02 13:53:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:50,367 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 13:53:50,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 13:53:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:53:50,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:50,368 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:50,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:50,583 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2021-05-02 13:53:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:50,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030958594] [2021-05-02 13:53:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:50,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:50,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733230467] [2021-05-02 13:53:50,595 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 [2021-05-02 13:53:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:53:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:50,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:53:50,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:50,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030958594] [2021-05-02 13:53:50,897 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:50,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733230467] [2021-05-02 13:53:50,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733230467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:50,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:50,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 13:53:50,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296905441] [2021-05-02 13:53:50,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:53:50,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:53:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:53:50,899 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:51,154 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-05-02 13:53:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:53:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 13:53:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:51,156 INFO L225 Difference]: With dead ends: 52 [2021-05-02 13:53:51,156 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 13:53:51,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:53:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 13:53:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 13:53:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:53:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 13:53:51,165 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2021-05-02 13:53:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:51,165 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 13:53:51,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 13:53:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 13:53:51,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:51,166 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:51,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:51,373 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 2 times [2021-05-02 13:53:51,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:51,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153391460] [2021-05-02 13:53:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:51,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315598257] [2021-05-02 13:53:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:51,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:53:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:53:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:53:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:51,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:53:51,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153391460] [2021-05-02 13:53:51,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315598257] [2021-05-02 13:53:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315598257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:51,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 13:53:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172747034] [2021-05-02 13:53:51,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:53:51,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:53:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:53:51,904 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:52,286 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-05-02 13:53:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:53:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 13:53:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:52,288 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:53:52,288 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:53:52,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:53:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:53:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:53:52,289 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) [2021-05-02 13:53:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:53:52,289 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 13:53:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:52,289 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:53:52,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:53:52,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:53:52,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:52,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:53:52,671 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-05-02 13:53:52,908 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2021-05-02 13:53:53,044 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:53:53,048 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|)) [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:53:53,048 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:53:53,048 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:53:53,048 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 1)) [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= main_~Y~0 1)) (.cse3 (* (* main_~X~0 main_~y~0) 2)) (.cse2 (* (* main_~x~0 main_~Y~0) 2)) (.cse1 (<= 0 main_~Y~0)) (.cse4 (* main_~Y~0 4)) (.cse5 (<= main_~X~0 1))) (or (and .cse0 (= main_~Y~0 main_~yx~0) (= main_~y~0 1) .cse1 (<= 0 main_~X~0) (< main_~X~0 main_~x~0) (= (+ (* main_~Y~0 2) .cse2) (+ main_~v~0 main_~X~0 .cse3)) (= main_~y~0 main_~xy~0) (= main_~x~0 1)) (and .cse0 (<= 2 main_~x~0) (<= main_~x~0 (+ main_~X~0 1)) .cse1 (= (+ .cse4 .cse3) (+ (* main_~X~0 4) .cse2)) .cse5 (= (* main_~Y~0 6) (+ main_~v~0 (* main_~X~0 5)))) (and (= main_~yx~0 0) (= main_~y~0 0) .cse1 (= (+ main_~v~0 main_~X~0) .cse4) (< main_~v~0 (* 2 main_~Y~0)) .cse5 (= main_~xy~0 0)))) [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L198 CegarLoopUtils]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-05-02 13:53:53,049 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse2 (= main_~y~0 0)) (.cse3 (<= 0 main_~Y~0)) (.cse1 (+ main_~v~0 main_~X~0)) (.cse0 (<= main_~Y~0 1)) (.cse6 (* main_~Y~0 4)) (.cse4 (<= 0 main_~X~0)) (.cse5 (<= main_~X~0 1)) (.cse7 (* 2 main_~Y~0))) (or (and .cse0 (= .cse1 (* main_~Y~0 2)) .cse2 .cse3 .cse4 (= main_~x~0 0) .cse5) (and .cse0 (<= 2 main_~x~0) (<= main_~x~0 (+ main_~X~0 1)) .cse3 (= (+ .cse6 (* (* main_~X~0 main_~y~0) 2)) (+ (* main_~X~0 4) (* (* main_~x~0 main_~Y~0) 2))) .cse5 (= (* main_~Y~0 6) (+ main_~v~0 (* main_~X~0 5)))) (and .cse2 .cse3 (= .cse1 .cse6) (< main_~v~0 .cse7) .cse5) (and .cse0 (= main_~y~0 1) (= .cse6 (+ main_~v~0 (* main_~X~0 3))) .cse4 .cse5 (= main_~x~0 1) (<= .cse7 (+ main_~v~0 (* 2 main_~X~0)))))) [2021-05-02 13:53:53,050 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~X~0 main_~y~0)) (.cse0 (<= main_~Y~0 1)) (.cse2 (<= 0 main_~X~0)) (.cse8 (= main_~yx~0 0)) (.cse13 (= main_~y~0 0)) (.cse11 (<= 0 main_~Y~0)) (.cse12 (+ main_~v~0 main_~X~0)) (.cse1 (* main_~Y~0 4)) (.cse5 (* 2 main_~Y~0)) (.cse4 (<= main_~X~0 1)) (.cse14 (= main_~xy~0 0))) (or (and .cse0 (= main_~Y~0 main_~yx~0) (= main_~y~0 1) (= .cse1 (+ main_~v~0 (* main_~X~0 3))) .cse2 (= .cse3 main_~xy~0) .cse4 (= main_~x~0 1) (<= .cse5 (+ main_~v~0 (* 2 main_~X~0)))) (let ((.cse6 (+ main_~X~0 1)) (.cse10 (* main_~X~0 4))) (and .cse0 (<= 2 main_~x~0) (<= main_~x~0 .cse6) (let ((.cse7 (= main_~Y~0 0))) (or (and .cse7 .cse8) (let ((.cse9 (div main_~yx~0 main_~Y~0))) (and (<= 2 .cse9) (not .cse7) (= (+ .cse1 (* (* main_~X~0 (div main_~xy~0 main_~X~0)) 2)) (+ .cse10 (* (* main_~Y~0 .cse9) 2))) (<= .cse9 .cse6))))) .cse11 (= (+ .cse1 (* .cse3 2)) (+ .cse10 (* (* main_~x~0 main_~Y~0) 2))) .cse4 (= (* main_~Y~0 6) (+ main_~v~0 (* main_~X~0 5))))) (and .cse8 .cse0 (= .cse12 (* main_~Y~0 2)) .cse13 .cse11 .cse2 (= main_~x~0 0) .cse4 .cse14) (and .cse8 .cse13 .cse11 (= .cse12 .cse1) (< main_~v~0 .cse5) .cse4 .cse14))) [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:53:53,050 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:53:53,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:53:53 BoogieIcfgContainer [2021-05-02 13:53:53,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:53:53,060 INFO L168 Benchmark]: Toolchain (without parser) took 5079.75 ms. Allocated memory was 188.7 MB in the beginning and 298.8 MB in the end (delta: 110.1 MB). Free memory was 152.8 MB in the beginning and 258.2 MB in the end (delta: -105.4 MB). Peak memory consumption was 156.3 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:53,060 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 169.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:53:53,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.82 ms. Allocated memory is still 188.7 MB. Free memory was 152.6 MB in the beginning and 171.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:53,060 INFO L168 Benchmark]: Boogie Preprocessor took 16.81 ms. Allocated memory is still 188.7 MB. Free memory was 171.4 MB in the beginning and 169.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:53,061 INFO L168 Benchmark]: RCFGBuilder took 180.67 ms. Allocated memory is still 188.7 MB. Free memory was 169.8 MB in the beginning and 154.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:53,061 INFO L168 Benchmark]: TraceAbstraction took 4715.64 ms. Allocated memory was 188.7 MB in the beginning and 298.8 MB in the end (delta: 110.1 MB). Free memory was 154.1 MB in the beginning and 258.2 MB in the end (delta: -104.1 MB). Peak memory consumption was 157.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:53,061 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 188.7 MB. Free memory is still 169.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.82 ms. Allocated memory is still 188.7 MB. Free memory was 152.6 MB in the beginning and 171.4 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.81 ms. Allocated memory is still 188.7 MB. Free memory was 171.4 MB in the beginning and 169.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 180.67 ms. Allocated memory is still 188.7 MB. Free memory was 169.8 MB in the beginning and 154.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4715.64 ms. Allocated memory was 188.7 MB in the beginning and 298.8 MB in the end (delta: 110.1 MB). Free memory was 154.1 MB in the beginning and 258.2 MB in the end (delta: -104.1 MB). Peak memory consumption was 157.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4113.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 12.5ms, AutomataDifference: 1065.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 557.5ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 167 SDslu, 575 SDs, 0 SdLazy, 896 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 483.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 964.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 28 PreInvPairs, 41 NumberOfFragments, 488 HoareAnnotationTreeSize, 28 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 51.5ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 631 FormulaSimplificationTreeSizeReductionInter, 499.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 50.1ms SsaConstructionTime, 114.0ms SatisfiabilityAnalysisTime, 1459.7ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1347 SizeOfPredicates, 29 NumberOfNonLiveVariables, 707 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 34/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((((((((Y <= 1 && v + X == Y * 2) && y == 0) && 0 <= Y) && 0 <= X) && x == 0) && X <= 1) || ((((((Y <= 1 && 2 <= x) && x <= X + 1) && 0 <= Y) && Y * 4 + X * y * 2 == X * 4 + x * Y * 2) && X <= 1) && Y * 6 == v + X * 5)) || ((((y == 0 && 0 <= Y) && v + X == Y * 4) && v < 2 * Y) && X <= 1)) || ((((((Y <= 1 && y == 1) && Y * 4 == v + X * 3) && 0 <= X) && X <= 1) && x == 1) && 2 * Y <= v + 2 * X) RESULT: Ultimate proved your program to be correct! Received shutdown request...