/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/geo3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:00:03,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:00:03,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:00:03,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:00:03,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:00:03,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:00:03,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:00:03,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:00:03,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:00:03,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:00:03,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:00:03,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:00:03,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:00:03,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:00:03,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:00:03,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:00:03,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:00:03,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:00:03,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:00:03,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:00:03,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:00:03,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:00:03,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:00:03,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:00:03,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:00:03,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:00:03,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:00:03,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:00:03,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:00:03,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:00:03,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:00:03,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:00:03,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:00:03,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:00:03,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:00:03,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:00:03,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:00:03,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:00:03,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:00:03,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:00:03,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:00:03,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:00:03,635 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:00:03,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-06 03:00:03,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb18ddd9/111352a2fee44c13abe3c61bfc29c220/FLAG8187a177d [2021-05-06 03:00:04,041 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:00:04,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-06 03:00:04,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb18ddd9/111352a2fee44c13abe3c61bfc29c220/FLAG8187a177d [2021-05-06 03:00:04,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb18ddd9/111352a2fee44c13abe3c61bfc29c220 [2021-05-06 03:00:04,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:00:04,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:00:04,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:04,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:00:04,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:00:04,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502d8af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04, skipping insertion in model container [2021-05-06 03:00:04,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:00:04,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:00:04,156 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/geo3-ll_unwindbound5.c[525,538] [2021-05-06 03:00:04,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:04,178 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:00:04,185 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/geo3-ll_unwindbound5.c[525,538] [2021-05-06 03:00:04,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:00:04,240 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:00:04,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04 WrapperNode [2021-05-06 03:00:04,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:00:04,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:00:04,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:00:04,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:00:04,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... [2021-05-06 03:00:04,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:00:04,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:00:04,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:00:04,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:00:04,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:00:04,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:00:04,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:00:04,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:00:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:00:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:00:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:00:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:00:04,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:00:04,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:00:04,462 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 03:00:04,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:04 BoogieIcfgContainer [2021-05-06 03:00:04,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:00:04,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:00:04,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:00:04,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:00:04,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:00:04" (1/3) ... [2021-05-06 03:00:04,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316be5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:04, skipping insertion in model container [2021-05-06 03:00:04,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:00:04" (2/3) ... [2021-05-06 03:00:04,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316be5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:00:04, skipping insertion in model container [2021-05-06 03:00:04,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:00:04" (3/3) ... [2021-05-06 03:00:04,468 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound5.c [2021-05-06 03:00:04,472 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:00:04,474 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:00:04,484 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:00:04,497 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:00:04,497 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:00:04,497 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:00:04,498 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:00:04,498 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:00:04,498 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:00:04,498 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:00:04,498 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:00:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 03:00:04,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:04,511 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:04,511 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 03:00:04,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:04,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788682905] [2021-05-06 03:00:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:04,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:04,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479439606] [2021-05-06 03:00:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:04,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 03:00:04,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:04,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:04,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788682905] [2021-05-06 03:00:04,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:04,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479439606] [2021-05-06 03:00:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479439606] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:04,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:04,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 03:00:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292752536] [2021-05-06 03:00:04,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 03:00:04,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 03:00:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 03:00:04,786 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:04,798 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 03:00:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 03:00:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 03:00:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:04,803 INFO L225 Difference]: With dead ends: 38 [2021-05-06 03:00:04,803 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 03:00:04,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 03:00:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 03:00:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 03:00:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 03:00:04,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 03:00:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:04,826 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 03:00:04,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 03:00:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:00:04,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:04,827 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:05,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 03:00:05,042 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 03:00:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:05,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153095720] [2021-05-06 03:00:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:05,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857943020] [2021-05-06 03:00:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:00:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:05,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:05,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:05,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153095720] [2021-05-06 03:00:05,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:05,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857943020] [2021-05-06 03:00:05,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857943020] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:05,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:05,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:00:05,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353840380] [2021-05-06 03:00:05,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:00:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:00:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:00:05,266 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:05,279 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 03:00:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:00:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:00:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:05,282 INFO L225 Difference]: With dead ends: 26 [2021-05-06 03:00:05,282 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 03:00:05,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:00:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 03:00:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 03:00:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 03:00:05,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 03:00:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:05,286 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 03:00:05,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 03:00:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 03:00:05,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:05,287 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:05,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:05,488 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 03:00:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:05,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212578520] [2021-05-06 03:00:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:05,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:05,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463422472] [2021-05-06 03:00:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:05,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:00:05,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:05,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:05,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:05,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212578520] [2021-05-06 03:00:05,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:05,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463422472] [2021-05-06 03:00:05,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463422472] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:00:05,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:00:05,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:00:05,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176408869] [2021-05-06 03:00:05,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:00:05,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:00:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:00:05,608 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:05,633 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 03:00:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:00:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 03:00:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:05,634 INFO L225 Difference]: With dead ends: 28 [2021-05-06 03:00:05,634 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 03:00:05,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 03:00:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 03:00:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 03:00:05,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 03:00:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:05,639 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 03:00:05,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 03:00:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 03:00:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:00:05,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:05,639 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:05,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:05,859 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 03:00:05,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:05,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999893128] [2021-05-06 03:00:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:05,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:05,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857045049] [2021-05-06 03:00:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:00:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:05,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:06,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999893128] [2021-05-06 03:00:06,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:06,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857045049] [2021-05-06 03:00:06,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857045049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:06,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:06,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:00:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009581025] [2021-05-06 03:00:06,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:00:06,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:00:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:00:06,032 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:06,054 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 03:00:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:00:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:00:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:06,055 INFO L225 Difference]: With dead ends: 34 [2021-05-06 03:00:06,055 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 03:00:06,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:06,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 03:00:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 03:00:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 03:00:06,059 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 03:00:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:06,059 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 03:00:06,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 03:00:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:00:06,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:06,060 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:06,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:06,280 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 03:00:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270464366] [2021-05-06 03:00:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:06,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:06,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444852980] [2021-05-06 03:00:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:00:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:00:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:06,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270464366] [2021-05-06 03:00:06,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:06,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444852980] [2021-05-06 03:00:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444852980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:06,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:06,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:00:06,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038307590] [2021-05-06 03:00:06,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:00:06,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:00:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:06,405 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:06,436 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 03:00:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:00:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:00:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:06,437 INFO L225 Difference]: With dead ends: 36 [2021-05-06 03:00:06,437 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:00:06,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:00:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:00:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:00:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 03:00:06,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 03:00:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:06,441 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 03:00:06,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:00:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 03:00:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:00:06,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:06,442 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:06,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:06,661 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 03:00:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:06,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371354173] [2021-05-06 03:00:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:06,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:06,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427618996] [2021-05-06 03:00:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:06,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:00:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:00:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:06,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:00:06,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:06,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371354173] [2021-05-06 03:00:06,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:06,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427618996] [2021-05-06 03:00:06,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427618996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:00:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267110371] [2021-05-06 03:00:06,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:00:06,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:06,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:00:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:00:06,809 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:06,846 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 03:00:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:00:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 03:00:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:06,848 INFO L225 Difference]: With dead ends: 42 [2021-05-06 03:00:06,848 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 03:00:06,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:00:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 03:00:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 03:00:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 03:00:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 03:00:06,858 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 03:00:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:06,858 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 03:00:06,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 03:00:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:00:06,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:06,859 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:07,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,078 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:07,079 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 03:00:07,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:07,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393696425] [2021-05-06 03:00:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:07,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:07,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138122255] [2021-05-06 03:00:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:00:07,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 03:00:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 03:00:07,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393696425] [2021-05-06 03:00:07,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138122255] [2021-05-06 03:00:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138122255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:07,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:07,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:00:07,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909102765] [2021-05-06 03:00:07,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:00:07,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:00:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:00:07,347 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:07,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:00:07,541 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 03:00:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:00:07,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 03:00:07,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:00:07,542 INFO L225 Difference]: With dead ends: 44 [2021-05-06 03:00:07,542 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:00:07,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:00:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:00:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 03:00:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 03:00:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 03:00:07,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 03:00:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:00:07,546 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 03:00:07,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 03:00:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 03:00:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:00:07,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:00:07,547 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:00:07,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,761 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:00:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:00:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 03:00:07,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:00:07,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214849453] [2021-05-06 03:00:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:00:07,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:00:07,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660735154] [2021-05-06 03:00:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:00:07,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 03:00:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:00:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:00:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:00:07,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:07,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:00:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:00:08,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:00:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214849453] [2021-05-06 03:00:08,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:00:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660735154] [2021-05-06 03:00:08,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660735154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:00:08,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:00:08,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:00:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793619645] [2021-05-06 03:00:08,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:00:08,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:00:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:00:08,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:00:08,166 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)