/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/mannadiv_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:12:34,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:12:34,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:12:34,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:12:34,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:12:34,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:12:34,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:12:34,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:12:34,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:12:34,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:12:34,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:12:34,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:12:34,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:12:34,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:12:34,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:12:34,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:12:34,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:12:34,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:12:34,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:12:34,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:12:34,672 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 04:12:34,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:12:34,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:12:34,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:12:34,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:12:34,710 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:12:34,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:12:34,710 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:12:34,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:12:34,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:12:34,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:12:34,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:12:34,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:12:34,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:12:34,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:12:34,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:12:34,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:12:34,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:12:34,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:12:34,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:12:34,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:12:34,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:12:34,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:12:34,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:12:34,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:12:35,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:12:35,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:12:35,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:12:35,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:12:35,073 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:12:35,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-06 04:12:35,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cb7a02b9/9eee314112204259aaa07b990e80a3fc/FLAGf79ddd6a2 [2021-05-06 04:12:35,533 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:12:35,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-06 04:12:35,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cb7a02b9/9eee314112204259aaa07b990e80a3fc/FLAGf79ddd6a2 [2021-05-06 04:12:35,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cb7a02b9/9eee314112204259aaa07b990e80a3fc [2021-05-06 04:12:35,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:12:35,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:12:35,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:12:35,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:12:35,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:12:35,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:12:35" (1/1) ... [2021-05-06 04:12:35,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9e1aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:35, skipping insertion in model container [2021-05-06 04:12:35,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:12:35" (1/1) ... [2021-05-06 04:12:35,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:12:35,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:12:36,075 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/mannadiv_unwindbound5.c[573,586] [2021-05-06 04:12:36,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:12:36,095 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:12:36,132 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/mannadiv_unwindbound5.c[573,586] [2021-05-06 04:12:36,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:12:36,148 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:12:36,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36 WrapperNode [2021-05-06 04:12:36,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:12:36,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:12:36,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:12:36,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:12:36,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... [2021-05-06 04:12:36,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:12:36,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:12:36,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:12:36,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:12:36,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:12:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:12:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:12:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:12:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:12:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:12:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:12:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:12:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:12:36,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:12:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:12:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:12:36,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:12:36,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:12:36,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:12:36,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:12:36,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:12:36,531 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:12:36,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:12:36 BoogieIcfgContainer [2021-05-06 04:12:36,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:12:36,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:12:36,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:12:36,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:12:36,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:12:35" (1/3) ... [2021-05-06 04:12:36,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c5abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:12:36, skipping insertion in model container [2021-05-06 04:12:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:12:36" (2/3) ... [2021-05-06 04:12:36,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c5abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:12:36, skipping insertion in model container [2021-05-06 04:12:36,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:12:36" (3/3) ... [2021-05-06 04:12:36,538 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2021-05-06 04:12:36,542 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:12:36,545 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:12:36,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:12:36,575 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:12:36,575 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:12:36,575 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:12:36,575 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:12:36,575 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:12:36,575 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:12:36,575 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:12:36,575 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:12:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 04:12:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 04:12:36,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:36,602 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:36,602 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:36,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-06 04:12:36,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:36,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995393932] [2021-05-06 04:12:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:36,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:12:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:36,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:12:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 04:12:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:36,879 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 04:12:36,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:36,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995393932] [2021-05-06 04:12:36,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995393932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:36,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:36,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:12:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105658855] [2021-05-06 04:12:36,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:12:36,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:36,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:12:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:12:36,899 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 04:12:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:36,996 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-06 04:12:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:12:36,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 22 [2021-05-06 04:12:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:37,004 INFO L225 Difference]: With dead ends: 54 [2021-05-06 04:12:37,004 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:12:37,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:12:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:12:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:12:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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 04:12:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 04:12:37,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 04:12:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:37,050 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 04:12:37,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 04:12:37,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 04:12:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:12:37,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:37,052 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 04:12:37,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:12:37,053 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:37,054 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-06 04:12:37,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:37,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577025122] [2021-05-06 04:12:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:37,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:37,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898167179] [2021-05-06 04:12:37,093 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 04:12:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:12:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:37,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,346 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 04:12:37,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577025122] [2021-05-06 04:12:37,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:37,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898167179] [2021-05-06 04:12:37,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898167179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:37,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:37,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:12:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699707074] [2021-05-06 04:12:37,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:12:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:12:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:12:37,349 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:12:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:37,360 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:12:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:12:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 04:12:37,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:37,361 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:12:37,361 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:12:37,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:12:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:12:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:12:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 04:12:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 04:12:37,368 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 04:12:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:37,369 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 04:12:37,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:12:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 04:12:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 04:12:37,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:37,370 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 04:12:37,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:12:37,593 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-06 04:12:37,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:37,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150433445] [2021-05-06 04:12:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:37,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:37,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241233119] [2021-05-06 04:12:37,617 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 04:12:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:37,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 04:12:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:37,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:12:37,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150433445] [2021-05-06 04:12:37,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241233119] [2021-05-06 04:12:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241233119] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:12:37,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:12:37,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 04:12:37,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314218412] [2021-05-06 04:12:37,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:37,778 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:12:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:37,878 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 04:12:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 04:12:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:37,880 INFO L225 Difference]: With dead ends: 37 [2021-05-06 04:12:37,880 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:12:37,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:12:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:12:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 04:12:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:12:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 04:12:37,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 04:12:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:37,901 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 04:12:37,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:12:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 04:12:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:12:37,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:37,902 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:38,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:38,121 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:38,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-06 04:12:38,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:38,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515849631] [2021-05-06 04:12:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:38,133 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:38,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037268524] [2021-05-06 04:12:38,133 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 04:12:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:12:38,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:38,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:38,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:38,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515849631] [2021-05-06 04:12:38,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:38,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037268524] [2021-05-06 04:12:38,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037268524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:38,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:38,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:12:38,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323130439] [2021-05-06 04:12:38,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:38,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:38,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:38,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:38,295 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:12:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:38,367 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 04:12:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 04:12:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:38,370 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:12:38,370 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:12:38,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:12:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:12:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 04:12:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 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 04:12:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 04:12:38,377 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 04:12:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:38,377 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 04:12:38,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:12:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 04:12:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 04:12:38,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:38,378 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:38,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:38,602 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-06 04:12:38,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:38,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002352054] [2021-05-06 04:12:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:38,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:38,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417866160] [2021-05-06 04:12:38,615 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 04:12:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:12:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:12:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:38,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:38,751 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 04:12:38,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002352054] [2021-05-06 04:12:38,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417866160] [2021-05-06 04:12:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417866160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:38,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:38,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:12:38,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192297596] [2021-05-06 04:12:38,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:12:38,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:12:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:12:38,753 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:12:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:38,794 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-06 04:12:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:12:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 04:12:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:38,797 INFO L225 Difference]: With dead ends: 43 [2021-05-06 04:12:38,798 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:12:38,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:12:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:12:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:12:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 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 04:12:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:12:38,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 04:12:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:38,816 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:12:38,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:12:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:12:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 04:12:38,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:38,820 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:39,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:39,033 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-06 04:12:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:39,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734826987] [2021-05-06 04:12:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:39,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:39,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082147785] [2021-05-06 04:12:39,044 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 04:12:39,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:12:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:12:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:39,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:39,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734826987] [2021-05-06 04:12:39,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082147785] [2021-05-06 04:12:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082147785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:39,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:39,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:12:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940820509] [2021-05-06 04:12:39,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:12:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:12:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:12:39,285 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:12:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:39,377 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:12:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:12:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 04:12:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:39,380 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:12:39,380 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:12:39,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:12:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:12:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 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 04:12:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 04:12:39,397 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 04:12:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:39,397 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 04:12:39,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:12:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 04:12:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:12:39,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:39,398 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:39,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:12:39,601 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-06 04:12:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:39,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401989299] [2021-05-06 04:12:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:39,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:39,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503558427] [2021-05-06 04:12:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:39,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:12:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:12:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:39,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:39,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401989299] [2021-05-06 04:12:39,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503558427] [2021-05-06 04:12:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503558427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:39,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:39,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:12:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852782126] [2021-05-06 04:12:39,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:12:39,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:39,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:12:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:12:39,879 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:12:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:39,945 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 04:12:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:12:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 04:12:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:39,947 INFO L225 Difference]: With dead ends: 61 [2021-05-06 04:12:39,947 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 04:12:39,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:12:39,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 04:12:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 04:12:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:12:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 04:12:39,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 04:12:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:39,954 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 04:12:39,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:12:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 04:12:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 04:12:39,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:39,955 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:40,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:40,175 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-06 04:12:40,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:40,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184714877] [2021-05-06 04:12:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:40,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:40,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384236561] [2021-05-06 04:12:40,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:40,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:12:40,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:12:40,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:12:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:12:40,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:12:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:12:40,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:12:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184714877] [2021-05-06 04:12:40,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:12:40,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384236561] [2021-05-06 04:12:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384236561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:12:40,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:12:40,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:12:40,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540047430] [2021-05-06 04:12:40,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:12:40,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:12:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:12:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:12:40,444 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:12:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:12:40,541 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-06 04:12:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:12:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 04:12:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:12:40,546 INFO L225 Difference]: With dead ends: 70 [2021-05-06 04:12:40,546 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 04:12:40,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:12:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 04:12:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 04:12:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:12:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 04:12:40,562 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 04:12:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:12:40,562 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 04:12:40,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:12:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 04:12:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 04:12:40,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:12:40,564 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:12:40,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:40,785 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:12:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:12:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-06 04:12:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:12:40,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631243728] [2021-05-06 04:12:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:12:40,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:12:40,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58864141] [2021-05-06 04:12:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:12:40,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:12:40,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 04:12:40,901 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:12:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:12:40,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:12:40,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:12:40,988 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:12:41,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 04:12:41,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:12:41 BoogieIcfgContainer [2021-05-06 04:12:41,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:12:41,250 INFO L168 Benchmark]: Toolchain (without parser) took 5318.36 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 164.6 MB in the beginning and 208.1 MB in the end (delta: -43.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:12:41,250 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 200.3 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:12:41,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.30 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 183.6 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:41,250 INFO L168 Benchmark]: Boogie Preprocessor took 24.14 ms. Allocated memory is still 200.3 MB. Free memory was 183.6 MB in the beginning and 182.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:41,250 INFO L168 Benchmark]: RCFGBuilder took 358.56 ms. Allocated memory is still 200.3 MB. Free memory was 182.0 MB in the beginning and 166.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:12:41,250 INFO L168 Benchmark]: TraceAbstraction took 4715.94 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 166.8 MB in the beginning and 208.1 MB in the end (delta: -41.3 MB). Peak memory consumption was 661.4 kB. Max. memory is 8.0 GB. [2021-05-06 04:12:41,251 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 200.3 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.30 ms. Allocated memory is still 200.3 MB. Free memory was 164.4 MB in the beginning and 183.6 MB in the end (delta: -19.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 24.14 ms. Allocated memory is still 200.3 MB. Free memory was 183.6 MB in the beginning and 182.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.56 ms. Allocated memory is still 200.3 MB. Free memory was 182.0 MB in the beginning and 166.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4715.94 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 166.8 MB in the beginning and 208.1 MB in the end (delta: -41.3 MB). Peak memory consumption was 661.4 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=6, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=6, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] COND FALSE !(counter++<5) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4628.9ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 26.6ms, AutomataDifference: 627.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 212 SDtfs, 125 SDslu, 483 SDs, 0 SdLazy, 218 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 269.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 301.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.8ms SsaConstructionTime, 300.5ms SatisfiabilityAnalysisTime, 1091.0ms InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 733 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1130 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 53/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...