/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/hard2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:29:59,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:29:59,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:29:59,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:29:59,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:29:59,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:29:59,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:29:59,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:29:59,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:29:59,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:29:59,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:29:59,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:29:59,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:29:59,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:29:59,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:29:59,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:29:59,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:29:59,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:29:59,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:29:59,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:29:59,197 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 03:29:59,227 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:29:59,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:29:59,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:29:59,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:29:59,230 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:29:59,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:29:59,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:29:59,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:29:59,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:29:59,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:29:59,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:29:59,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:29:59,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:29:59,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:29:59,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:29:59,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:29:59,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:29:59,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:29:59,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:29:59,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:29:59,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:29:59,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:29:59,557 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:29:59,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c [2021-05-06 03:29:59,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1abd122/a4a5fbbea47049019065ac67af02b41b/FLAG7b0125f12 [2021-05-06 03:29:59,953 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:29:59,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c [2021-05-06 03:29:59,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1abd122/a4a5fbbea47049019065ac67af02b41b/FLAG7b0125f12 [2021-05-06 03:30:00,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1abd122/a4a5fbbea47049019065ac67af02b41b [2021-05-06 03:30:00,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:30:00,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:30:00,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:30:00,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:30:00,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:30:00,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea100c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00, skipping insertion in model container [2021-05-06 03:30:00,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:30:00,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:30:00,515 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/hard2_unwindbound1.c[526,539] [2021-05-06 03:30:00,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:30:00,538 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:30:00,547 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/hard2_unwindbound1.c[526,539] [2021-05-06 03:30:00,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:30:00,560 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:30:00,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00 WrapperNode [2021-05-06 03:30:00,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:30:00,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:30:00,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:30:00,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:30:00,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (1/1) ... [2021-05-06 03:30:00,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:30:00,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:30:00,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:30:00,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:30:00,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (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 03:30:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:30:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:30:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:30:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:30:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:30:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:30:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:30:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:30:00,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:30:00,921 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:30:00,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:30:00 BoogieIcfgContainer [2021-05-06 03:30:00,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:30:00,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:30:00,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:30:00,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:30:00,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:30:00" (1/3) ... [2021-05-06 03:30:00,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de2e062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:30:00, skipping insertion in model container [2021-05-06 03:30:00,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:30:00" (2/3) ... [2021-05-06 03:30:00,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de2e062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:30:00, skipping insertion in model container [2021-05-06 03:30:00,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:30:00" (3/3) ... [2021-05-06 03:30:00,928 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound1.c [2021-05-06 03:30:00,932 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:30:00,934 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:30:00,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:30:00,977 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:30:00,977 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:30:00,977 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:30:00,977 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:30:00,977 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:30:00,978 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:30:00,978 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:30:00,978 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:30:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 03:30:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:30:00,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:00,993 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:00,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2021-05-06 03:30:01,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:01,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991338426] [2021-05-06 03:30:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:01,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991338426] [2021-05-06 03:30:01,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991338426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:01,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:01,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:30:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960902479] [2021-05-06 03:30:01,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:30:01,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:30:01,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:30:01,217 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:01,306 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-05-06 03:30:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:30:01,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:30:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:01,312 INFO L225 Difference]: With dead ends: 57 [2021-05-06 03:30:01,312 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 03:30:01,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:30:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 03:30:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 03:30:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-06 03:30:01,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-06 03:30:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:01,342 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-06 03:30:01,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-06 03:30:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:30:01,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:01,343 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:01,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:30:01,343 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2021-05-06 03:30:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:01,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353119755] [2021-05-06 03:30:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:01,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:01,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353119755] [2021-05-06 03:30:01,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353119755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:01,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:01,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:30:01,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19247890] [2021-05-06 03:30:01,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:30:01,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:30:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:01,431 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:01,636 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-05-06 03:30:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:30:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:30:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:01,637 INFO L225 Difference]: With dead ends: 41 [2021-05-06 03:30:01,638 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 03:30:01,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:30:01,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 03:30:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-06 03:30:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 03:30:01,646 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-06 03:30:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:01,646 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 03:30:01,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 03:30:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 03:30:01,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:01,647 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:01,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:30:01,647 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2021-05-06 03:30:01,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:01,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686847539] [2021-05-06 03:30:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:01,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:01,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686847539] [2021-05-06 03:30:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686847539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:01,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:01,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:30:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417229909] [2021-05-06 03:30:01,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:01,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:01,748 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:01,855 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-06 03:30:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:30:01,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 03:30:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:01,857 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:30:01,857 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 03:30:01,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 03:30:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 03:30:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 03:30:01,869 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-06 03:30:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:01,869 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 03:30:01,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:30:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 03:30:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:30:01,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:01,870 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:01,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:30:01,870 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2021-05-06 03:30:01,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:01,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645961783] [2021-05-06 03:30:01,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:30:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 03:30:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:30:01,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:01,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645961783] [2021-05-06 03:30:01,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645961783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:01,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:01,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:30:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308570628] [2021-05-06 03:30:01,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:30:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:30:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:01,976 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:30:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:02,151 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:30:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:30:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 03:30:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:02,152 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:30:02,153 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:30:02,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:30:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:30:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-06 03:30:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 03:30:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-06 03:30:02,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-06 03:30:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:02,158 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-06 03:30:02,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:30:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-06 03:30:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:30:02,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:02,158 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:02,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:30:02,159 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2021-05-06 03:30:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:02,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537131151] [2021-05-06 03:30:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:02,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:02,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460729585] [2021-05-06 03:30:02,166 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 03:30:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:30:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:02,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:30:02,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:02,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537131151] [2021-05-06 03:30:02,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:02,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460729585] [2021-05-06 03:30:02,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460729585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:02,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:02,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:30:02,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628470172] [2021-05-06 03:30:02,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:02,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:02,339 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:30:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:02,375 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-05-06 03:30:02,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:30:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 03:30:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:02,376 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:30:02,376 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:30:02,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:30:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 03:30:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:30:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 03:30:02,382 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2021-05-06 03:30:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:02,382 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 03:30:02,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:30:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 03:30:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 03:30:02,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:02,383 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:02,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:02,604 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2021-05-06 03:30:02,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:02,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614402459] [2021-05-06 03:30:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:02,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:02,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576399779] [2021-05-06 03:30:02,610 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 03:30:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:30:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:30:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:30:02,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:30:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:30:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:30:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614402459] [2021-05-06 03:30:02,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:30:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576399779] [2021-05-06 03:30:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576399779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:30:02,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:30:02,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:30:02,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625206358] [2021-05-06 03:30:02,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:30:02,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:30:02,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:30:02,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:30:02,768 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:02,817 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:30:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:30:02,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 03:30:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:02,819 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:30:02,819 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:30:02,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:30:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:30:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 03:30:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:30:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-05-06 03:30:02,827 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 30 [2021-05-06 03:30:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:02,828 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-05-06 03:30:02,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:30:02,828 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-05-06 03:30:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 03:30:02,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:02,841 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:30:03,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:03,055 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2021-05-06 03:30:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:03,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865868648] [2021-05-06 03:30:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:03,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:03,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155677984] [2021-05-06 03:30:03,062 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 03:30:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:30:03,109 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:30:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 03:30:03,123 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 03:30:03,150 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 03:30:03,150 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 03:30:03,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:03,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:30:03 BoogieIcfgContainer [2021-05-06 03:30:03,394 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:30:03,394 INFO L168 Benchmark]: Toolchain (without parser) took 3015.70 ms. Allocated memory was 209.7 MB in the beginning and 251.7 MB in the end (delta: 41.9 MB). Free memory was 174.0 MB in the beginning and 195.8 MB in the end (delta: -21.8 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:03,395 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 209.7 MB. Free memory is still 190.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:30:03,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.98 ms. Allocated memory is still 209.7 MB. Free memory was 173.8 MB in the beginning and 164.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:03,395 INFO L168 Benchmark]: Boogie Preprocessor took 67.50 ms. Allocated memory is still 209.7 MB. Free memory was 164.0 MB in the beginning and 192.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:03,395 INFO L168 Benchmark]: RCFGBuilder took 292.66 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 175.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:03,395 INFO L168 Benchmark]: TraceAbstraction took 2470.43 ms. Allocated memory was 209.7 MB in the beginning and 251.7 MB in the end (delta: 41.9 MB). Free memory was 175.3 MB in the beginning and 195.8 MB in the end (delta: -20.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 8.0 GB. [2021-05-06 03:30:03,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 209.7 MB. Free memory is still 190.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 178.98 ms. Allocated memory is still 209.7 MB. Free memory was 173.8 MB in the beginning and 164.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.50 ms. Allocated memory is still 209.7 MB. Free memory was 164.0 MB in the beginning and 192.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.66 ms. Allocated memory is still 209.7 MB. Free memory was 192.6 MB in the beginning and 175.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2470.43 ms. Allocated memory was 209.7 MB in the beginning and 251.7 MB in the end (delta: 41.9 MB). Free memory was 175.3 MB in the beginning and 195.8 MB in the end (delta: -20.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: 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)=11, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=1, B=1, counter=0, d=1, p=1, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=1, counter=1, d=1, p=1, q=0, r=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=1, B=1, counter=1, d=2, p=2, q=0, r=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L34] COND FALSE !(counter++<1) [L44] EXPR counter++ VAL [\old(counter)=0, A=1, B=1, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L44] COND FALSE !(counter++<1) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L58] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=1, counter=3, d=2, p=2, q=0, r=1] [L59] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2409.8ms, OverallIterations: 7, TraceHistogramMax: 5, EmptinessCheckTime: 21.8ms, AutomataDifference: 694.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 205 SDtfs, 76 SDslu, 354 SDs, 0 SdLazy, 277 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 295.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 313.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.0ms SsaConstructionTime, 122.8ms SatisfiabilityAnalysisTime, 486.0ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 378 SizeOfPredicates, 2 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 28/28 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...