/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/divbin_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:13:34,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:13:34,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:13:34,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:13:34,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:13:34,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:13:34,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:13:34,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:13:34,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:13:34,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:13:34,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:13:34,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:13:34,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:13:34,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:13:34,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:13:34,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:13:34,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:13:34,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:13:34,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:13:34,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:13:34,176 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 02:13:34,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:13:34,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:13:34,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:13:34,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:13:34,207 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:13:34,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:13:34,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:13:34,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:13:34,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:13:34,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:13:34,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:13:34,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:13:34,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:13:34,209 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:13:34,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:13:34,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:13:34,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:13:34,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:13:34,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:13:34,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:13:34,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:13:34,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:13:34,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:13:34,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:13:34,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:13:34,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:13:34,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:13:34,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:13:34,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:13:34,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2021-05-06 02:13:34,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062699be7/50e3d146b7324b7dabad58ba8f6f3719/FLAGced284210 [2021-05-06 02:13:34,987 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:13:34,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2021-05-06 02:13:34,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062699be7/50e3d146b7324b7dabad58ba8f6f3719/FLAGced284210 [2021-05-06 02:13:35,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062699be7/50e3d146b7324b7dabad58ba8f6f3719 [2021-05-06 02:13:35,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:13:35,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:13:35,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:13:35,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:13:35,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:13:35,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608dc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35, skipping insertion in model container [2021-05-06 02:13:35,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:13:35,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:13:35,176 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/divbin_valuebound10.i[958,971] [2021-05-06 02:13:35,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:13:35,202 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:13:35,214 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/divbin_valuebound10.i[958,971] [2021-05-06 02:13:35,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:13:35,242 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:13:35,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35 WrapperNode [2021-05-06 02:13:35,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:13:35,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:13:35,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:13:35,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:13:35,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (1/1) ... [2021-05-06 02:13:35,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:13:35,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:13:35,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:13:35,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:13:35,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (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 02:13:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:13:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:13:35,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:13:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:13:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:13:35,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:13:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:13:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:13:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:13:35,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:13:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:13:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:13:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:13:35,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:13:35,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:13:35,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:13:35,665 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:13:35,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:13:35 BoogieIcfgContainer [2021-05-06 02:13:35,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:13:35,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:13:35,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:13:35,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:13:35,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:13:35" (1/3) ... [2021-05-06 02:13:35,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4511dd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:13:35, skipping insertion in model container [2021-05-06 02:13:35,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:35" (2/3) ... [2021-05-06 02:13:35,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4511dd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:13:35, skipping insertion in model container [2021-05-06 02:13:35,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:13:35" (3/3) ... [2021-05-06 02:13:35,684 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2021-05-06 02:13:35,688 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:13:35,690 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:13:35,714 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:13:35,741 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:13:35,741 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:13:35,741 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:13:35,741 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:13:35,742 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:13:35,742 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:13:35,742 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:13:35,742 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:13:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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) [2021-05-06 02:13:35,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:13:35,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:35,764 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, 1, 1] [2021-05-06 02:13:35,765 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:35,769 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-06 02:13:35,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:35,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177073482] [2021-05-06 02:13:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:35,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:13:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:35,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:13:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:36,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:13:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:36,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:13:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:13:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:13:36,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:36,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177073482] [2021-05-06 02:13:36,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177073482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:13:36,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:13:36,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:13:36,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800735669] [2021-05-06 02:13:36,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:13:36,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:36,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:13:36,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:36,045 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-05-06 02:13:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:36,162 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-06 02:13:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:13:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 34 [2021-05-06 02:13:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:36,169 INFO L225 Difference]: With dead ends: 61 [2021-05-06 02:13:36,169 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 02:13:36,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 02:13:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 02:13:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-05-06 02:13:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 02:13:36,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 02:13:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:36,209 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 02:13:36,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-05-06 02:13:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 02:13:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:13:36,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:36,212 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, 1, 1, 1] [2021-05-06 02:13:36,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:13:36,212 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-06 02:13:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:36,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124604854] [2021-05-06 02:13:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:36,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:36,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164357334] [2021-05-06 02:13:36,249 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 02:13:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:13:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:13:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:13:36,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:36,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124604854] [2021-05-06 02:13:36,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:13:36,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164357334] [2021-05-06 02:13:36,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164357334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:13:36,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:13:36,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:13:36,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005042715] [2021-05-06 02:13:36,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:13:36,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:36,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:13:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:13:36,608 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-05-06 02:13:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:36,772 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 02:13:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:13:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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 35 [2021-05-06 02:13:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:36,775 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:13:36,775 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:13:36,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:13:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:13:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 02:13:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 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 02:13:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 02:13:36,784 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 02:13:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:36,785 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 02:13:36,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 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) [2021-05-06 02:13:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 02:13:36,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:13:36,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:36,786 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-05-06 02:13:37,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:13:37,012 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-06 02:13:37,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:37,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811917719] [2021-05-06 02:13:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:37,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:37,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847598166] [2021-05-06 02:13:37,027 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 02:13:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:37,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:13:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:13:37,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:13:37,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:37,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811917719] [2021-05-06 02:13:37,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:13:37,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847598166] [2021-05-06 02:13:37,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847598166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:13:37,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:13:37,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:13:37,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615859536] [2021-05-06 02:13:37,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:13:37,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:37,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:13:37,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:13:37,360 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:13:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:39,803 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-06 02:13:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:13:39,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 02:13:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:39,805 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:13:39,805 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 02:13:39,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:13:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 02:13:39,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-06 02:13:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 02:13:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 02:13:39,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-05-06 02:13:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:39,812 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 02:13:39,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:13:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 02:13:39,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:13:39,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:39,813 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, 1, 1, 1] [2021-05-06 02:13:40,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:13:40,016 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:40,016 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-06 02:13:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649576891] [2021-05-06 02:13:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:40,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:40,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386417212] [2021-05-06 02:13:40,027 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 02:13:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 02:13:40,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:13:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:13:40,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649576891] [2021-05-06 02:13:40,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:13:40,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386417212] [2021-05-06 02:13:40,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386417212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:13:40,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:13:40,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:13:40,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067855833] [2021-05-06 02:13:40,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:13:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:13:40,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:40,155 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:13:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:40,178 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-06 02:13:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:13:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 02:13:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:40,180 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:13:40,180 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:13:40,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:13:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:13:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 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 02:13:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 02:13:40,188 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 43 [2021-05-06 02:13:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:40,188 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 02:13:40,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:13:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 02:13:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:13:40,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:40,191 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:13:40,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:13:40,397 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-06 02:13:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:40,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325681713] [2021-05-06 02:13:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:40,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:40,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305200679] [2021-05-06 02:13:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true