/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/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:50:24,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:50:24,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:50:24,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:50:24,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:50:24,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:50:24,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:50:24,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:50:24,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:50:24,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:50:24,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:50:24,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:50:24,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:50:24,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:50:24,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:50:24,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:50:24,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:50:24,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:50:24,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:50:24,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:50:24,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:50:24,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:50:24,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:50:24,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:50:24,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:50:24,220 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:50:24,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:50:24,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:50:24,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:50:24,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:50:24,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:50:24,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:50:24,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:50:24,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:50:24,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:50:24,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:50:24,564 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:50:24,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2021-05-02 13:50:24,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0687a260f/683a0885e7a34bf0b528f04a16119c88/FLAGfc2770d31 [2021-05-02 13:50:25,108 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:50:25,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2021-05-02 13:50:25,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0687a260f/683a0885e7a34bf0b528f04a16119c88/FLAGfc2770d31 [2021-05-02 13:50:25,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0687a260f/683a0885e7a34bf0b528f04a16119c88 [2021-05-02 13:50:25,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:50:25,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:50:25,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:50:25,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:50:25,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:50:25,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a63fa13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25, skipping insertion in model container [2021-05-02 13:50:25,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:50:25,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:50:25,669 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/lcm2.c[545,558] [2021-05-02 13:50:25,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:50:25,687 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:50:25,698 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/lcm2.c[545,558] [2021-05-02 13:50:25,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:50:25,713 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:50:25,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25 WrapperNode [2021-05-02 13:50:25,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:50:25,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:50:25,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:50:25,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:50:25,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... [2021-05-02 13:50:25,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:50:25,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:50:25,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:50:25,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:50:25,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:50:25,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:50:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:50:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:50:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:50:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:50:25,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:50:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:50:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:50:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:50:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:50:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 13:50:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:50:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:50:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:50:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:50:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:50:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:50:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:50:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:50:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:50:26,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:50:26,160 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:50:26,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:50:26 BoogieIcfgContainer [2021-05-02 13:50:26,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:50:26,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:50:26,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:50:26,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:50:26,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:50:25" (1/3) ... [2021-05-02 13:50:26,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130fcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:50:26, skipping insertion in model container [2021-05-02 13:50:26,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:50:25" (2/3) ... [2021-05-02 13:50:26,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130fcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:50:26, skipping insertion in model container [2021-05-02 13:50:26,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:50:26" (3/3) ... [2021-05-02 13:50:26,184 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2.c [2021-05-02 13:50:26,198 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:50:26,202 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:50:26,215 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:50:26,247 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:50:26,247 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:50:26,247 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:50:26,247 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:50:26,247 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:50:26,248 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:50:26,248 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:50:26,248 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:50:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:50:26,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:50:26,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:50:26,269 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:50:26,270 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:50:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:50:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 656971502, now seen corresponding path program 1 times [2021-05-02 13:50:26,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:50:26,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643560215] [2021-05-02 13:50:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:50:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:50:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:50:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 13:50:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 13:50:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 13:50:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 13:50:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:50:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643560215] [2021-05-02 13:50:26,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643560215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:50:26,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:50:26,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:50:26,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904319158] [2021-05-02 13:50:26,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:50:26,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:50:26,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:50:26,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:50:26,622 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:50:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:50:26,731 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2021-05-02 13:50:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:50:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 13:50:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:50:26,739 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:50:26,739 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:50:26,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:50:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:50:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 13:50:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:50:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 13:50:26,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 32 [2021-05-02 13:50:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:50:26,775 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 13:50:26,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:50:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 13:50:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:50:26,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:50:26,777 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:50:26,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:50:26,778 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:50:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:50:26,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1510033502, now seen corresponding path program 1 times [2021-05-02 13:50:26,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:50:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115425922] [2021-05-02 13:50:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:50:26,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:50:26,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418485418] [2021-05-02 13:50:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:50:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:50:27,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:50:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:50:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:50:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 13:50:27,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:50:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115425922] [2021-05-02 13:50:27,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:50:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418485418] [2021-05-02 13:50:27,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418485418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:50:27,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:50:27,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:50:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126883622] [2021-05-02 13:50:27,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:50:27,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:50:27,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:50:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:50:27,377 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:50:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:50:27,557 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 13:50:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:50:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 13:50:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:50:27,559 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:50:27,559 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 13:50:27,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:50:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 13:50:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 13:50:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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) [2021-05-02 13:50:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-05-02 13:50:27,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 32 [2021-05-02 13:50:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:50:27,570 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-05-02 13:50:27,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:50:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-05-02 13:50:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 13:50:27,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:50:27,571 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:50:27,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:50:27,775 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:50:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:50:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash 905413410, now seen corresponding path program 1 times [2021-05-02 13:50:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:50:27,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141776848] [2021-05-02 13:50:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:50:27,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:50:27,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738104310] [2021-05-02 13:50:27,787 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