/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/lcm2_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:08:59,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:08:59,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:08:59,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:08:59,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:08:59,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:08:59,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:08:59,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:08:59,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:08:59,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:08:59,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:08:59,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:08:59,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:08:59,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:08:59,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:08:59,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:08:59,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:08:59,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:08:59,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:08:59,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:08:59,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 16:08:59,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:08:59,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:08:59,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:08:59,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:08:59,267 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:08:59,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:08:59,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:08:59,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:08:59,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:08:59,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:08:59,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:08:59,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:08:59,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:08:59,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:08:59,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:08:59,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:08:59,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:08:59,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:08:59,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:08:59,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:08:59,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:08:59,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:08:59,536 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:08:59,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound100.c [2021-05-02 16:08:59,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369b3dea6/1db27f58028e43ad9e4c033f3c31717e/FLAGcc5d08a0b [2021-05-02 16:08:59,976 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:08:59,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_valuebound100.c [2021-05-02 16:08:59,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369b3dea6/1db27f58028e43ad9e4c033f3c31717e/FLAGcc5d08a0b [2021-05-02 16:08:59,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/369b3dea6/1db27f58028e43ad9e4c033f3c31717e [2021-05-02 16:08:59,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:08:59,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:08:59,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:09:00,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:09:00,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:09:00,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:08:59" (1/1) ... [2021-05-02 16:09:00,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34700b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00, skipping insertion in model container [2021-05-02 16:09:00,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:08:59" (1/1) ... [2021-05-02 16:09:00,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:09:00,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:09:00,136 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/lcm2_valuebound100.c[545,558] [2021-05-02 16:09:00,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:09:00,158 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:09:00,180 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/lcm2_valuebound100.c[545,558] [2021-05-02 16:09:00,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:09:00,202 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:09:00,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00 WrapperNode [2021-05-02 16:09:00,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:09:00,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:09:00,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:09:00,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:09:00,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (1/1) ... [2021-05-02 16:09:00,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:09:00,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:09:00,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:09:00,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:09:00,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (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 [2021-05-02 16:09:00,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:09:00,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:09:00,289 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:09:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:09:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:09:00,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:09:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:09:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:09:00,290 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:09:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:09:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 16:09:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:09:00,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:09:00,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:09:00,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:09:00,453 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:09:00,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:09:00 BoogieIcfgContainer [2021-05-02 16:09:00,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:09:00,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:09:00,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:09:00,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:09:00,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:08:59" (1/3) ... [2021-05-02 16:09:00,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13814892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:09:00, skipping insertion in model container [2021-05-02 16:09:00,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:09:00" (2/3) ... [2021-05-02 16:09:00,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13814892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:09:00, skipping insertion in model container [2021-05-02 16:09:00,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:09:00" (3/3) ... [2021-05-02 16:09:00,458 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_valuebound100.c [2021-05-02 16:09:00,462 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:09:00,464 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:09:00,488 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:09:00,513 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:09:00,514 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:09:00,514 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:09:00,514 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:09:00,514 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:09:00,514 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:09:00,514 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:09:00,514 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:09:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:09:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 16:09:00,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:09:00,539 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:09:00,540 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:09:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:09:00,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1830914611, now seen corresponding path program 1 times [2021-05-02 16:09:00,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:09:00,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464891577] [2021-05-02 16:09:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:09:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:09:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:09:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 16:09:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 16:09:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 16:09:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-02 16:09:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 16:09:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 16:09:00,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:09:00,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464891577] [2021-05-02 16:09:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464891577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:09:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:09:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:09:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806638138] [2021-05-02 16:09:00,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:09:00,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:09:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:09:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:09:00,734 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 16:09:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:09:00,866 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 16:09:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:09:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 16:09:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:09:00,872 INFO L225 Difference]: With dead ends: 61 [2021-05-02 16:09:00,872 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:09:00,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:09:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:09:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:09:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:09:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-02 16:09:00,911 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 43 [2021-05-02 16:09:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:09:00,911 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-02 16:09:00,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 16:09:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-02 16:09:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 16:09:00,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:09:00,913 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:09:00,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:09:00,914 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:09:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:09:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 206107499, now seen corresponding path program 1 times [2021-05-02 16:09:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:09:00,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454753050] [2021-05-02 16:09:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:09:00,952 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:09:00,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927747020] [2021-05-02 16:09:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:09:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:09:01,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:09:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:09:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:09:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 16:09:01,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:09:01,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454753050] [2021-05-02 16:09:01,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:09:01,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927747020] [2021-05-02 16:09:01,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927747020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:09:01,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:09:01,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:09:01,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760781126] [2021-05-02 16:09:01,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:09:01,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:09:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:09:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:09:01,390 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 16:09:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:09:01,541 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 16:09:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:09:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 16:09:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:09:01,543 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:09:01,543 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 16:09:01,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:09:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 16:09:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-05-02 16:09:01,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:09:01,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-02 16:09:01,549 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 43 [2021-05-02 16:09:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:09:01,550 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-02 16:09:01,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 16:09:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-02 16:09:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 16:09:01,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:09:01,551 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:09:01,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:09:01,755 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:09:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:09:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1555618915, now seen corresponding path program 1 times [2021-05-02 16:09:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:09:01,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008265408] [2021-05-02 16:09:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:09:01,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:09:01,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269136842] [2021-05-02 16:09:01,770 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