/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:25:15,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:25:15,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:25:15,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:25:16,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:25:16,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:25:16,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:25:16,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:25:16,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:25:16,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:25:16,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:25:16,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:25:16,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:25:16,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:25:16,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:25:16,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:25:16,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:25:16,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:25:16,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:25:16,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:25:16,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 01:25:16,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:25:16,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:25:16,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:25:16,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:25:16,108 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:25:16,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:25:16,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:25:16,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:25:16,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:25:16,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:25:16,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:25:16,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:25:16,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:25:16,110 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:25:16,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:25:16,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:25:16,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:25:16,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:25:16,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:25:16,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:25:16,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:25:16,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:25:16,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:25:16,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:25:16,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:25:16,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:25:16,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:25:16,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:25:16,447 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:25:16,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-05-06 01:25:16,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84f4c2a0/a40ed141e919446d8b7dc9570536bacb/FLAG372cc3158 [2021-05-06 01:25:17,001 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:25:17,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound10.c [2021-05-06 01:25:17,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84f4c2a0/a40ed141e919446d8b7dc9570536bacb/FLAG372cc3158 [2021-05-06 01:25:17,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c84f4c2a0/a40ed141e919446d8b7dc9570536bacb [2021-05-06 01:25:17,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:25:17,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:25:17,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:25:17,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:25:17,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:25:17,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205ba826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17, skipping insertion in model container [2021-05-06 01:25:17,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:25:17,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:25:17,596 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_valuebound10.c[597,610] [2021-05-06 01:25:17,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:25:17,615 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:25:17,624 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_valuebound10.c[597,610] [2021-05-06 01:25:17,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:25:17,673 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:25:17,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17 WrapperNode [2021-05-06 01:25:17,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:25:17,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:25:17,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:25:17,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:25:17,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... [2021-05-06 01:25:17,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:25:17,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:25:17,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:25:17,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:25:17,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:25:17,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:25:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:25:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:25:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:25:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:25:17,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:25:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:25:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:25:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:25:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:25:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:25:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:25:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:25:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:25:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:25:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:25:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:25:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:25:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:25:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:25:18,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:25:18,054 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 01:25:18,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:25:18 BoogieIcfgContainer [2021-05-06 01:25:18,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:25:18,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:25:18,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:25:18,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:25:18,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:25:17" (1/3) ... [2021-05-06 01:25:18,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4200326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:25:18, skipping insertion in model container [2021-05-06 01:25:18,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:25:17" (2/3) ... [2021-05-06 01:25:18,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4200326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:25:18, skipping insertion in model container [2021-05-06 01:25:18,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:25:18" (3/3) ... [2021-05-06 01:25:18,064 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound10.c [2021-05-06 01:25:18,068 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:25:18,071 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:25:18,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:25:18,106 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:25:18,106 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:25:18,106 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:25:18,106 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:25:18,106 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:25:18,106 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:25:18,106 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:25:18,106 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:25:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:25:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:25:18,125 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:18,125 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:18,126 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-06 01:25:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:18,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827461191] [2021-05-06 01:25:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:25:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:18,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:25:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:18,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 01:25:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:25:18,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:25:18,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827461191] [2021-05-06 01:25:18,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827461191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:25:18,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:25:18,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:25:18,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142650069] [2021-05-06 01:25:18,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:25:18,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:25:18,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:25:18,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:25:18,361 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:25:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:25:18,460 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-06 01:25:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:25:18,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 01:25:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:25:18,468 INFO L225 Difference]: With dead ends: 57 [2021-05-06 01:25:18,468 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 01:25:18,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:25:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 01:25:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 01:25:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:25:18,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 01:25:18,514 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-06 01:25:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:25:18,515 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 01:25:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:25:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 01:25:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:25:18,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:18,517 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:18,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:25:18,519 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:18,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-06 01:25:18,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:18,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80369324] [2021-05-06 01:25:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:18,557 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:25:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126139161] [2021-05-06 01:25:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:18,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:25:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:25:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:25:18,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:25:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80369324] [2021-05-06 01:25:18,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:25:18,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126139161] [2021-05-06 01:25:18,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126139161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:25:18,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:25:18,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:25:18,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552860972] [2021-05-06 01:25:18,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:25:18,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:25:18,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:25:18,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:25:18,810 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:25:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:25:18,932 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-05-06 01:25:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:25:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 01:25:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:25:18,934 INFO L225 Difference]: With dead ends: 39 [2021-05-06 01:25:18,934 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:25:18,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:25:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:25:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 01:25:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 01:25:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 01:25:18,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-06 01:25:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:25:18,943 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 01:25:18,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:25:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 01:25:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:25:18,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:18,945 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:19,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:25:19,170 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2021-05-06 01:25:19,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:19,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026574851] [2021-05-06 01:25:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:19,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:25:19,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316407344] [2021-05-06 01:25:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 01:25:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:25:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:19,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:19,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:19,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 01:25:19,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:25:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026574851] [2021-05-06 01:25:19,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:25:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316407344] [2021-05-06 01:25:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316407344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:25:19,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:25:19,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 01:25:19,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510988965] [2021-05-06 01:25:19,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 01:25:19,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:25:19,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 01:25:19,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:25:19,443 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:25:19,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:25:19,623 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-06 01:25:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:25:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 01:25:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:25:19,625 INFO L225 Difference]: With dead ends: 48 [2021-05-06 01:25:19,625 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 01:25:19,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-06 01:25:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 01:25:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 01:25:19,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:25:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 01:25:19,643 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-06 01:25:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:25:19,644 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 01:25:19,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:25:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 01:25:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:25:19,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:19,646 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:19,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:19,853 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2021-05-06 01:25:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:19,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281860442] [2021-05-06 01:25:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:19,864 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:25:19,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400157325] [2021-05-06 01:25:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 01:25:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:25:20,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:25:20,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:25:20,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281860442] [2021-05-06 01:25:20,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:25:20,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400157325] [2021-05-06 01:25:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400157325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:25:20,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:25:20,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 01:25:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450314106] [2021-05-06 01:25:20,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:25:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:25:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:25:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:25:20,110 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:25:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:25:20,252 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-06 01:25:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:25:20,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 01:25:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:25:20,257 INFO L225 Difference]: With dead ends: 56 [2021-05-06 01:25:20,257 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 01:25:20,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:25:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 01:25:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-06 01:25:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 01:25:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-06 01:25:20,278 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-06 01:25:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:25:20,279 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-06 01:25:20,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 01:25:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-06 01:25:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 01:25:20,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:20,281 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:20,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:20,499 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:20,500 INFO L82 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2021-05-06 01:25:20,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:20,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887291301] [2021-05-06 01:25:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:20,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:25:20,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23014857] [2021-05-06 01:25:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:25:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 01:25:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:25:20,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:25:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 01:25:20,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:25:20,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887291301] [2021-05-06 01:25:20,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:25:20,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23014857] [2021-05-06 01:25:20,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23014857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:25:20,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:25:20,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 01:25:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276864383] [2021-05-06 01:25:20,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 01:25:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:25:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 01:25:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 01:25:20,854 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:25:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:25:21,110 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 01:25:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 01:25:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-06 01:25:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:25:21,112 INFO L225 Difference]: With dead ends: 61 [2021-05-06 01:25:21,112 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 01:25:21,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 01:25:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 01:25:21,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-06 01:25:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 01:25:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 01:25:21,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-06 01:25:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:25:21,118 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 01:25:21,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:25:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 01:25:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 01:25:21,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:25:21,119 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:25:21,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:21,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:25:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:25:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 2 times [2021-05-06 01:25:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:25:21,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775930984] [2021-05-06 01:25:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:25:21,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:25:21,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58664147] [2021-05-06 01:25:21,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:25:21,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:25:21,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:25:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 01:25:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:29:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:29:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 01:29:42,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:29:42,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775930984] [2021-05-06 01:29:42,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:29:42,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58664147] [2021-05-06 01:29:42,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58664147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:29:42,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:29:42,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 01:29:42,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498606787] [2021-05-06 01:29:42,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 01:29:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:29:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 01:29:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:29:42,275 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:30:21,722 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-06 01:30:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:30:32,072 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-06 01:30:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 01:30:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-06 01:30:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:30:32,073 INFO L225 Difference]: With dead ends: 55 [2021-05-06 01:30:32,073 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 01:30:32,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 261325.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 01:30:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 01:30:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 01:30:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 01:30:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 01:30:32,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-06 01:30:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:30:32,074 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 01:30:32,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 01:30:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 01:30:32,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 01:30:32,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 01:30:32,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:30:32,530 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 01:30:32,531 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (or (and (= main_~yx~0 0) (= (+ main_~v~0 main_~X~0) (* main_~Y~0 2)) (= main_~y~0 0) (= main_~x~0 0) (= main_~xy~0 0)) (and (<= main_~Y~0 10) (<= 0 main_~Y~0))) [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-05-06 01:30:32,531 INFO L198 CegarLoopUtils]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 47) the Hoare annotation is: (and (<= main_~Y~0 10) (<= 0 main_~Y~0)) [2021-05-06 01:30:32,532 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~Y~0 10) (<= 0 main_~Y~0)) [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-06 01:30:32,532 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-06 01:30:32,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:30:32 BoogieIcfgContainer [2021-05-06 01:30:32,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:30:32,544 INFO L168 Benchmark]: Toolchain (without parser) took 315061.88 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 150.9 MB in the beginning and 188.8 MB in the end (delta: -37.9 MB). Peak memory consumption was 111.3 MB. Max. memory is 8.0 GB. [2021-05-06 01:30:32,544 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:30:32,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.10 ms. Allocated memory is still 186.6 MB. Free memory was 150.7 MB in the beginning and 171.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:30:32,544 INFO L168 Benchmark]: Boogie Preprocessor took 42.82 ms. Allocated memory is still 186.6 MB. Free memory was 171.0 MB in the beginning and 169.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 01:30:32,544 INFO L168 Benchmark]: RCFGBuilder took 336.72 ms. Allocated memory is still 186.6 MB. Free memory was 169.4 MB in the beginning and 153.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 01:30:32,544 INFO L168 Benchmark]: TraceAbstraction took 314487.37 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 153.2 MB in the beginning and 188.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 114.3 MB. Max. memory is 8.0 GB. [2021-05-06 01:30:32,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.10 ms. Allocated memory is still 186.6 MB. Free memory was 150.7 MB in the beginning and 171.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.82 ms. Allocated memory is still 186.6 MB. Free memory was 171.0 MB in the beginning and 169.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.72 ms. Allocated memory is still 186.6 MB. Free memory was 169.4 MB in the beginning and 153.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 314487.37 ms. Allocated memory was 186.6 MB in the beginning and 224.4 MB in the end (delta: 37.7 MB). Free memory was 153.2 MB in the beginning and 188.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 114.3 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: 314171.9ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 15.1ms, AutomataDifference: 50638.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 253.7ms, InitialAbstractionConstructionTime: 9.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 148 SDtfs, 102 SDslu, 666 SDs, 0 SdLazy, 759 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49455.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 261887.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 40 NumberOfFragments, 80 HoareAnnotationTreeSize, 24 FomulaSimplifications, 1067 FormulaSimplificationTreeSizeReduction, 79.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 500 FormulaSimplificationTreeSizeReductionInter, 163.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 57.9ms SsaConstructionTime, 167.0ms SatisfiabilityAnalysisTime, 261766.3ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 936 SizeOfPredicates, 23 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 42/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: Y <= 10 && 0 <= Y RESULT: Ultimate proved your program to be correct! Received shutdown request...