/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/fermat1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:03:11,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:03:11,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:03:11,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:03:11,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:03:11,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:03:11,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:03:11,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:03:11,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:03:11,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:03:11,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:03:11,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:03:11,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:03:11,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:03:11,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:03:11,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:03:11,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:03:11,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:03:11,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:03:11,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:03:11,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:03:11,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:03:11,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:03:11,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:03:11,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:03:11,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:03:11,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:03:11,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:03:11,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:03:11,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:03:11,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:03:11,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:03:11,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:03:11,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:03:11,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:03:11,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:03:11,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:03:11,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:03:11,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:03:11,551 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:03:11,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-02 15:03:11,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2579dca9f/434aaa8c325040dda1dc8b0413f00825/FLAG01a1930cc [2021-05-02 15:03:11,942 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:03:11,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound5.c [2021-05-02 15:03:11,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2579dca9f/434aaa8c325040dda1dc8b0413f00825/FLAG01a1930cc [2021-05-02 15:03:11,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2579dca9f/434aaa8c325040dda1dc8b0413f00825 [2021-05-02 15:03:11,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:03:11,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:03:11,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:03:11,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:03:11,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:03:11,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:03:11" (1/1) ... [2021-05-02 15:03:11,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451a8222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:11, skipping insertion in model container [2021-05-02 15:03:11,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:03:11" (1/1) ... [2021-05-02 15:03:11,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:03:11,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:03:12,066 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/fermat1-ll_unwindbound5.c[535,548] [2021-05-02 15:03:12,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:03:12,084 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:03:12,092 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/fermat1-ll_unwindbound5.c[535,548] [2021-05-02 15:03:12,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:03:12,107 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:03:12,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12 WrapperNode [2021-05-02 15:03:12,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:03:12,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:03:12,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:03:12,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:03:12,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... [2021-05-02 15:03:12,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:03:12,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:03:12,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:03:12,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:03:12,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:03:12,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:03:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:03:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:03:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:03:12,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:03:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:03:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:03:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:03:12,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:03:12,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:03:12,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:03:12,500 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:03:12,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:03:12 BoogieIcfgContainer [2021-05-02 15:03:12,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:03:12,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:03:12,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:03:12,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:03:12,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:03:11" (1/3) ... [2021-05-02 15:03:12,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af8f12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:03:12, skipping insertion in model container [2021-05-02 15:03:12,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:03:12" (2/3) ... [2021-05-02 15:03:12,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af8f12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:03:12, skipping insertion in model container [2021-05-02 15:03:12,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:03:12" (3/3) ... [2021-05-02 15:03:12,523 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound5.c [2021-05-02 15:03:12,526 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:03:12,529 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:03:12,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:03:12,571 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:03:12,572 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:03:12,572 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:03:12,572 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:03:12,572 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:03:12,572 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:03:12,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:03:12,572 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:03:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:03:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:03:12,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:12,612 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:03:12,612 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash 928708300, now seen corresponding path program 1 times [2021-05-02 15:03:12,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:12,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973063328] [2021-05-02 15:03:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:12,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:12,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602661005] [2021-05-02 15:03:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:03:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:03:12,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973063328] [2021-05-02 15:03:12,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:12,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602661005] [2021-05-02 15:03:12,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602661005] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:03:12,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:03:12,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:03:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29440512] [2021-05-02 15:03:12,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:03:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:03:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:03:12,905 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:12,924 INFO L93 Difference]: Finished difference Result 67 states and 100 transitions. [2021-05-02 15:03:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:03:12,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:03:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:12,930 INFO L225 Difference]: With dead ends: 67 [2021-05-02 15:03:12,930 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:03:12,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:03:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:03:12,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:03:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:03:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 15:03:12,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-02 15:03:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:12,964 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 15:03:12,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 15:03:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:03:12,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:12,966 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:03:13,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:03:13,181 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:13,182 INFO L82 PathProgramCache]: Analyzing trace with hash -155606603, now seen corresponding path program 1 times [2021-05-02 15:03:13,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:13,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500691266] [2021-05-02 15:03:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:13,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:13,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959074222] [2021-05-02 15:03:13,193 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 [2021-05-02 15:03:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:03:13,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:03:13,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500691266] [2021-05-02 15:03:13,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959074222] [2021-05-02 15:03:13,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959074222] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:03:13,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:03:13,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:03:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571812415] [2021-05-02 15:03:13,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:03:13,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:13,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:03:13,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:03:13,356 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:13,371 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 15:03:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:03:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:03:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:13,373 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:03:13,373 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:03:13,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:03:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:03:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:03:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:03:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 15:03:13,377 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-02 15:03:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:13,378 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 15:03:13,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 15:03:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:03:13,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:13,379 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:03:13,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:13,598 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash -153938307, now seen corresponding path program 1 times [2021-05-02 15:03:13,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:13,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661357154] [2021-05-02 15:03:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:13,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:13,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181635651] [2021-05-02 15:03:13,622 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 [2021-05-02 15:03:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:03:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:13,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:03:13,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:13,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661357154] [2021-05-02 15:03:13,867 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:13,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181635651] [2021-05-02 15:03:13,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181635651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:03:13,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:03:13,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:03:13,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469891011] [2021-05-02 15:03:13,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:03:13,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:03:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:03:13,870 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:20,032 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:03:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:03:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:03:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:20,034 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:03:20,034 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:03:20,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:03:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:03:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:03:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:03:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-02 15:03:20,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-02 15:03:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:20,043 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-02 15:03:20,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:03:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-02 15:03:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:03:20,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:20,044 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:03:20,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:20,259 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1676885497, now seen corresponding path program 1 times [2021-05-02 15:03:20,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:20,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850309936] [2021-05-02 15:03:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:20,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:20,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232965953] [2021-05-02 15:03:20,278 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 [2021-05-02 15:03:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:03:20,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:03:20,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:20,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850309936] [2021-05-02 15:03:20,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:20,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232965953] [2021-05-02 15:03:20,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232965953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:03:20,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:03:20,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:03:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012258698] [2021-05-02 15:03:20,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:03:20,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:20,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:03:20,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:03:20,595 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:03:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:40,568 INFO L93 Difference]: Finished difference Result 82 states and 111 transitions. [2021-05-02 15:03:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:03:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:03:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:40,570 INFO L225 Difference]: With dead ends: 82 [2021-05-02 15:03:40,570 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 15:03:40,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:03:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 15:03:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2021-05-02 15:03:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.38) internal successors, (69), 53 states have internal predecessors, (69), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:03:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 99 transitions. [2021-05-02 15:03:40,581 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 99 transitions. Word has length 29 [2021-05-02 15:03:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:40,581 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 99 transitions. [2021-05-02 15:03:40,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:03:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 99 transitions. [2021-05-02 15:03:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 15:03:40,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:40,582 INFO L523 BasicCegarLoop]: trace histogram [2, 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] [2021-05-02 15:03:40,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:40,797 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:40,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:40,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1154059858, now seen corresponding path program 1 times [2021-05-02 15:03:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:40,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413381788] [2021-05-02 15:03:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:40,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:40,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157773155] [2021-05-02 15:03:40,806 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 [2021-05-02 15:03:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:03:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:03:40,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:40,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413381788] [2021-05-02 15:03:40,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:40,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157773155] [2021-05-02 15:03:40,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157773155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:03:40,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:03:40,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:03:40,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299966795] [2021-05-02 15:03:40,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:03:40,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:03:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:03:40,909 INFO L87 Difference]: Start difference. First operand 72 states and 99 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:03:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:40,938 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2021-05-02 15:03:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:03:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 15:03:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:40,939 INFO L225 Difference]: With dead ends: 137 [2021-05-02 15:03:40,940 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 15:03:40,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:03:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 15:03:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-02 15:03:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 59 states have internal predecessors, (75), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:03:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2021-05-02 15:03:40,949 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 35 [2021-05-02 15:03:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:40,950 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2021-05-02 15:03:40,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:03:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2021-05-02 15:03:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:03:40,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:40,951 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:03:41,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:41,157 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:41,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1810200309, now seen corresponding path program 1 times [2021-05-02 15:03:41,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:41,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427870565] [2021-05-02 15:03:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:41,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:41,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906753784] [2021-05-02 15:03:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 15:03:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:03:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:03:41,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427870565] [2021-05-02 15:03:41,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:41,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906753784] [2021-05-02 15:03:41,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906753784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:03:41,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:03:41,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:03:41,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706790250] [2021-05-02 15:03:41,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:03:41,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:41,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:03:41,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:03:41,582 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:03:47,437 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 15:03:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:56,638 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-05-02 15:03:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:03:56,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-02 15:03:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:56,639 INFO L225 Difference]: With dead ends: 116 [2021-05-02 15:03:56,639 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 15:03:56,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:03:56,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 15:03:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2021-05-02 15:03:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.3428571428571427) internal successors, (94), 74 states have internal predecessors, (94), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:03:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2021-05-02 15:03:56,650 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 39 [2021-05-02 15:03:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:56,650 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2021-05-02 15:03:56,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:03:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2021-05-02 15:03:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:03:56,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:56,652 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1] [2021-05-02 15:03:56,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:56,855 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:56,855 INFO L82 PathProgramCache]: Analyzing trace with hash -174895632, now seen corresponding path program 1 times [2021-05-02 15:03:56,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:56,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113344993] [2021-05-02 15:03:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:56,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:56,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062473301] [2021-05-02 15:03:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 15:03:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:03:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:03:56,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:56,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113344993] [2021-05-02 15:03:56,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:56,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062473301] [2021-05-02 15:03:56,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062473301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:03:56,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:03:56,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:03:56,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342573418] [2021-05-02 15:03:56,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:03:56,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:03:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:03:56,985 INFO L87 Difference]: Start difference. First operand 99 states and 132 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:03:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:57,025 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2021-05-02 15:03:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:03:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 15:03:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:57,026 INFO L225 Difference]: With dead ends: 184 [2021-05-02 15:03:57,026 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 15:03:57,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:03:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 15:03:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 15:03:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 80 states have internal predecessors, (101), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:03:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-05-02 15:03:57,036 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 41 [2021-05-02 15:03:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:57,036 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-05-02 15:03:57,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:03:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2021-05-02 15:03:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:03:57,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:57,038 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1] [2021-05-02 15:03:57,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:57,255 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1292932747, now seen corresponding path program 1 times [2021-05-02 15:03:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:57,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099092387] [2021-05-02 15:03:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:57,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:57,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908489276] [2021-05-02 15:03:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 15:03:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:03:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:57,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:03:57,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:57,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099092387] [2021-05-02 15:03:57,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908489276] [2021-05-02 15:03:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908489276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:03:57,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:03:57,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:03:57,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971269690] [2021-05-02 15:03:57,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:03:57,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:57,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:03:57,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:03:57,422 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:03:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:57,471 INFO L93 Difference]: Finished difference Result 143 states and 193 transitions. [2021-05-02 15:03:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:03:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-05-02 15:03:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:57,472 INFO L225 Difference]: With dead ends: 143 [2021-05-02 15:03:57,472 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 15:03:57,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:03:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 15:03:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 15:03:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 82 states have internal predecessors, (103), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:03:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2021-05-02 15:03:57,496 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 43 [2021-05-02 15:03:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:57,497 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2021-05-02 15:03:57,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:03:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2021-05-02 15:03:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:03:57,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:57,502 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1] [2021-05-02 15:03:57,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:03:57,720 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1407897436, now seen corresponding path program 1 times [2021-05-02 15:03:57,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:57,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847583775] [2021-05-02 15:03:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:57,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:57,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964165247] [2021-05-02 15:03:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:57,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 15:03:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:03:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:03:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847583775] [2021-05-02 15:03:57,839 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:03:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964165247] [2021-05-02 15:03:57,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964165247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:03:57,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:03:57,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:03:57,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808092346] [2021-05-02 15:03:57,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:03:57,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:03:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:03:57,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:03:57,841 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:03:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:03:57,875 INFO L93 Difference]: Finished difference Result 234 states and 339 transitions. [2021-05-02 15:03:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:03:57,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 15:03:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:03:57,877 INFO L225 Difference]: With dead ends: 234 [2021-05-02 15:03:57,877 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 15:03:57,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:03:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 15:03:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-05-02 15:03:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 114 states have internal predecessors, (144), 34 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 26 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:03:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 210 transitions. [2021-05-02 15:03:57,887 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 210 transitions. Word has length 47 [2021-05-02 15:03:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:03:57,887 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 210 transitions. [2021-05-02 15:03:57,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:03:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 210 transitions. [2021-05-02 15:03:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:03:57,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:03:57,888 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 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] [2021-05-02 15:03:58,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:58,099 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:03:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:03:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash -105484190, now seen corresponding path program 1 times [2021-05-02 15:03:58,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:03:58,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348493763] [2021-05-02 15:03:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:03:58,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:03:58,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704878817] [2021-05-02 15:03:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:03:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:03:58,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:03:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:03:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:03:58,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:10,646 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:04:10,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:10,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:24,776 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:04:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:04:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 7 refuted. 3 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:04:24,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:04:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348493763] [2021-05-02 15:04:24,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:04:24,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704878817] [2021-05-02 15:04:24,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704878817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:04:24,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:04:24,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:04:24,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841814603] [2021-05-02 15:04:24,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:04:24,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:04:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:04:24,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 15:04:24,856 INFO L87 Difference]: Start difference. First operand 150 states and 210 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:05:35,656 WARN L205 SmtUtils]: Spent 14.16 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:06:11,235 WARN L205 SmtUtils]: Spent 11.04 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 15:06:49,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:06:49,479 INFO L93 Difference]: Finished difference Result 192 states and 268 transitions. [2021-05-02 15:06:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:06:49,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2021-05-02 15:06:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:06:49,481 INFO L225 Difference]: With dead ends: 192 [2021-05-02 15:06:49,481 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 15:06:49,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70915.4ms TimeCoverageRelationStatistics Valid=52, Invalid=241, Unknown=13, NotChecked=0, Total=306 [2021-05-02 15:06:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 15:06:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-05-02 15:06:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 115 states have (on average 1.3391304347826087) internal successors, (154), 123 states have internal predecessors, (154), 36 states have call successors, (36), 10 states have call predecessors, (36), 9 states have return successors, (34), 27 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 15:06:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2021-05-02 15:06:49,492 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 47 [2021-05-02 15:06:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:06:49,492 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2021-05-02 15:06:49,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:06:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2021-05-02 15:06:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:06:49,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:06:49,493 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:06:49,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:49,703 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:06:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:06:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1335036056, now seen corresponding path program 2 times [2021-05-02 15:06:49,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:06:49,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728916452] [2021-05-02 15:06:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:06:49,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:06:49,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981116119] [2021-05-02 15:06:49,716 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:06:49,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:06:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:06:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:06:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:06:49,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:52,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:06:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:06:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:06:53,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728916452] [2021-05-02 15:06:53,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:06:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981116119] [2021-05-02 15:06:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981116119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:06:53,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:06:53,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:06:53,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465215895] [2021-05-02 15:06:53,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:06:53,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:06:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:06:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2021-05-02 15:06:53,160 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:03,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:03,180 INFO L93 Difference]: Finished difference Result 271 states and 397 transitions. [2021-05-02 15:07:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:07:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2021-05-02 15:07:03,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:03,182 INFO L225 Difference]: With dead ends: 271 [2021-05-02 15:07:03,182 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 15:07:03,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3199.5ms TimeCoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2021-05-02 15:07:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 15:07:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 217. [2021-05-02 15:07:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 157 states have (on average 1.3885350318471337) internal successors, (218), 165 states have internal predecessors, (218), 49 states have call successors, (49), 11 states have call predecessors, (49), 10 states have return successors, (47), 40 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 15:07:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 314 transitions. [2021-05-02 15:07:03,198 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 314 transitions. Word has length 47 [2021-05-02 15:07:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:03,198 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 314 transitions. [2021-05-02 15:07:03,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 314 transitions. [2021-05-02 15:07:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:07:03,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:03,199 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 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, 1, 1, 1, 1] [2021-05-02 15:07:03,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:07:03,415 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1915058849, now seen corresponding path program 1 times [2021-05-02 15:07:03,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:03,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401985263] [2021-05-02 15:07:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:03,420 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:03,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134162974] [2021-05-02 15:07:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:03,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:07:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:03,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:07:03,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:03,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401985263] [2021-05-02 15:07:03,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:03,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134162974] [2021-05-02 15:07:03,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134162974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:03,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:03,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:07:03,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52666932] [2021-05-02 15:07:03,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:07:03,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:03,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:07:03,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:07:03,593 INFO L87 Difference]: Start difference. First operand 217 states and 314 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:03,657 INFO L93 Difference]: Finished difference Result 358 states and 521 transitions. [2021-05-02 15:07:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:07:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-05-02 15:07:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:03,659 INFO L225 Difference]: With dead ends: 358 [2021-05-02 15:07:03,659 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 15:07:03,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:07:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 15:07:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 15:07:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 139 states have (on average 1.3525179856115108) internal successors, (188), 144 states have internal predecessors, (188), 41 states have call successors, (41), 12 states have call predecessors, (41), 11 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 15:07:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 268 transitions. [2021-05-02 15:07:03,670 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 268 transitions. Word has length 49 [2021-05-02 15:07:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:03,670 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 268 transitions. [2021-05-02 15:07:03,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 268 transitions. [2021-05-02 15:07:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 15:07:03,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:03,671 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 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] [2021-05-02 15:07:03,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:03,887 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:03,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:03,887 INFO L82 PathProgramCache]: Analyzing trace with hash -60460648, now seen corresponding path program 2 times [2021-05-02 15:07:03,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:03,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354121609] [2021-05-02 15:07:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:03,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:03,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762140031] [2021-05-02 15:07:03,898 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:03,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:07:03,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:07:03,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:07:03,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:03,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:03,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:07:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354121609] [2021-05-02 15:07:04,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762140031] [2021-05-02 15:07:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762140031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:04,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:04,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:07:04,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259566013] [2021-05-02 15:07:04,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:07:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:07:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:07:04,059 INFO L87 Difference]: Start difference. First operand 192 states and 268 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:04,130 INFO L93 Difference]: Finished difference Result 272 states and 390 transitions. [2021-05-02 15:07:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:07:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-05-02 15:07:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:04,132 INFO L225 Difference]: With dead ends: 272 [2021-05-02 15:07:04,132 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 15:07:04,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:07:04,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 15:07:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-05-02 15:07:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 141 states have (on average 1.3475177304964538) internal successors, (190), 146 states have internal predecessors, (190), 41 states have call successors, (41), 12 states have call predecessors, (41), 11 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 15:07:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 270 transitions. [2021-05-02 15:07:04,147 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 270 transitions. Word has length 51 [2021-05-02 15:07:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:04,148 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 270 transitions. [2021-05-02 15:07:04,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 15:07:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 270 transitions. [2021-05-02 15:07:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:07:04,148 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:04,148 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 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, 1] [2021-05-02 15:07:04,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:07:04,357 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1067781299, now seen corresponding path program 1 times [2021-05-02 15:07:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:04,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814110295] [2021-05-02 15:07:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:04,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:04,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153426720] [2021-05-02 15:07:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:07:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:07:04,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:07:04,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:04,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814110295] [2021-05-02 15:07:04,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:04,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153426720] [2021-05-02 15:07:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153426720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:07:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136853985] [2021-05-02 15:07:04,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:07:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:07:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:07:04,532 INFO L87 Difference]: Start difference. First operand 194 states and 270 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:07:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:07:04,609 INFO L93 Difference]: Finished difference Result 214 states and 292 transitions. [2021-05-02 15:07:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:07:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2021-05-02 15:07:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:07:04,610 INFO L225 Difference]: With dead ends: 214 [2021-05-02 15:07:04,610 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 15:07:04,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:07:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 15:07:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2021-05-02 15:07:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 147 states have (on average 1.3333333333333333) internal successors, (196), 152 states have internal predecessors, (196), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 15:07:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 278 transitions. [2021-05-02 15:07:04,621 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 278 transitions. Word has length 55 [2021-05-02 15:07:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:07:04,621 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 278 transitions. [2021-05-02 15:07:04,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:07:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 278 transitions. [2021-05-02 15:07:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:07:04,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:07:04,622 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 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] [2021-05-02 15:07:04,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:04,837 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:07:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:07:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1713804371, now seen corresponding path program 2 times [2021-05-02 15:07:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:07:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784745188] [2021-05-02 15:07:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:07:04,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:07:04,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463240442] [2021-05-02 15:07:04,842 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:07:04,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:07:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:07:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 15:07:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:07:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:05,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:15,148 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:07:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:15,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:15,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:29,733 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:07:29,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:29,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:58,015 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 15:07:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:07:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 11 refuted. 10 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:07:58,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:07:58,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784745188] [2021-05-02 15:07:58,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:07:58,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463240442] [2021-05-02 15:07:58,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463240442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:07:58,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:07:58,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:07:58,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809476787] [2021-05-02 15:07:58,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:07:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:07:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:07:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=121, Unknown=10, NotChecked=0, Total=156 [2021-05-02 15:07:58,067 INFO L87 Difference]: Start difference. First operand 202 states and 278 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 15:09:01,872 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:09:57,280 WARN L205 SmtUtils]: Spent 6.93 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 15:11:02,361 WARN L205 SmtUtils]: Spent 7.79 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 15:14:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:00,954 INFO L93 Difference]: Finished difference Result 268 states and 374 transitions. [2021-05-02 15:14:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:14:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-05-02 15:14:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:00,956 INFO L225 Difference]: With dead ends: 268 [2021-05-02 15:14:00,956 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 15:14:00,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 120955.9ms TimeCoverageRelationStatistics Valid=58, Invalid=291, Unknown=31, NotChecked=0, Total=380 [2021-05-02 15:14:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 15:14:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2021-05-02 15:14:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 192 states have (on average 1.3489583333333333) internal successors, (259), 200 states have internal predecessors, (259), 56 states have call successors, (56), 15 states have call predecessors, (56), 14 states have return successors, (54), 47 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 15:14:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 369 transitions. [2021-05-02 15:14:00,972 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 369 transitions. Word has length 55 [2021-05-02 15:14:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:00,972 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 369 transitions. [2021-05-02 15:14:00,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 11 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 15:14:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 369 transitions. [2021-05-02 15:14:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:14:00,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:00,973 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 15:14:01,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:14:01,191 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash 181776133, now seen corresponding path program 1 times [2021-05-02 15:14:01,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:01,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738805997] [2021-05-02 15:14:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:01,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:01,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438864850] [2021-05-02 15:14:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:14:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:01,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:14:01,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738805997] [2021-05-02 15:14:01,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438864850] [2021-05-02 15:14:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438864850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:01,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:01,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 15:14:01,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202352916] [2021-05-02 15:14:01,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:14:01,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:01,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:14:01,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:14:01,342 INFO L87 Difference]: Start difference. First operand 263 states and 369 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:14:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:01,413 INFO L93 Difference]: Finished difference Result 490 states and 719 transitions. [2021-05-02 15:14:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:14:01,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2021-05-02 15:14:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:01,415 INFO L225 Difference]: With dead ends: 490 [2021-05-02 15:14:01,415 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 15:14:01,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:14:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 15:14:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-05-02 15:14:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 271 states have (on average 1.3505535055350553) internal successors, (366), 280 states have internal predecessors, (366), 80 states have call successors, (80), 15 states have call predecessors, (80), 14 states have return successors, (77), 70 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 15:14:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 523 transitions. [2021-05-02 15:14:01,440 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 523 transitions. Word has length 55 [2021-05-02 15:14:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:01,440 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 523 transitions. [2021-05-02 15:14:01,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:14:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 523 transitions. [2021-05-02 15:14:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:14:01,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:01,440 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:14:01,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:14:01,656 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1622296379, now seen corresponding path program 3 times [2021-05-02 15:14:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:01,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387070789] [2021-05-02 15:14:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:01,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:01,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816481866] [2021-05-02 15:14:01,663 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:01,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:14:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:14:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:14:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:01,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 15:14:01,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:01,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387070789] [2021-05-02 15:14:01,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:01,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816481866] [2021-05-02 15:14:01,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816481866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:01,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:01,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:14:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027904045] [2021-05-02 15:14:01,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:14:01,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:14:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:14:01,884 INFO L87 Difference]: Start difference. First operand 366 states and 523 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:14:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:06,931 INFO L93 Difference]: Finished difference Result 379 states and 539 transitions. [2021-05-02 15:14:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:14:06,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-05-02 15:14:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:06,933 INFO L225 Difference]: With dead ends: 379 [2021-05-02 15:14:06,933 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 15:14:06,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:14:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 15:14:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 375. [2021-05-02 15:14:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 288 states have internal predecessors, (374), 81 states have call successors, (81), 16 states have call predecessors, (81), 15 states have return successors, (79), 70 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 15:14:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 534 transitions. [2021-05-02 15:14:06,956 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 534 transitions. Word has length 55 [2021-05-02 15:14:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:06,957 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 534 transitions. [2021-05-02 15:14:06,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:14:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 534 transitions. [2021-05-02 15:14:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 15:14:06,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:06,957 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 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] [2021-05-02 15:14:07,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:14:07,160 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2095290798, now seen corresponding path program 2 times [2021-05-02 15:14:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:07,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567297154] [2021-05-02 15:14:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:07,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:07,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548464830] [2021-05-02 15:14:07,167 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:07,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:14:07,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:14:07,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:14:07,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:07,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:14:07,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567297154] [2021-05-02 15:14:07,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:07,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548464830] [2021-05-02 15:14:07,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548464830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:07,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:07,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:14:07,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786218036] [2021-05-02 15:14:07,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:14:07,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:14:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:14:07,369 INFO L87 Difference]: Start difference. First operand 375 states and 534 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:14:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:07,471 INFO L93 Difference]: Finished difference Result 602 states and 873 transitions. [2021-05-02 15:14:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:14:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2021-05-02 15:14:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:07,474 INFO L225 Difference]: With dead ends: 602 [2021-05-02 15:14:07,474 INFO L226 Difference]: Without dead ends: 354 [2021-05-02 15:14:07,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:14:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-02 15:14:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2021-05-02 15:14:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 263 states have (on average 1.3346007604562737) internal successors, (351), 269 states have internal predecessors, (351), 74 states have call successors, (74), 16 states have call predecessors, (74), 15 states have return successors, (72), 67 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 15:14:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 497 transitions. [2021-05-02 15:14:07,497 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 497 transitions. Word has length 57 [2021-05-02 15:14:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:07,497 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 497 transitions. [2021-05-02 15:14:07,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:14:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 497 transitions. [2021-05-02 15:14:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 15:14:07,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:07,498 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-02 15:14:07,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:14:07,716 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash -659642693, now seen corresponding path program 3 times [2021-05-02 15:14:07,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:07,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926280941] [2021-05-02 15:14:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:07,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225419926] [2021-05-02 15:14:07,729 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:07,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 15:14:07,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:14:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 15:14:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:07,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:07,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:14:08,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926280941] [2021-05-02 15:14:08,002 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:08,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225419926] [2021-05-02 15:14:08,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225419926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:08,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:08,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:14:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759681642] [2021-05-02 15:14:08,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:14:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:14:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:14:08,003 INFO L87 Difference]: Start difference. First operand 353 states and 497 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:14:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:08,106 INFO L93 Difference]: Finished difference Result 434 states and 618 transitions. [2021-05-02 15:14:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:14:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 15:14:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:08,108 INFO L225 Difference]: With dead ends: 434 [2021-05-02 15:14:08,108 INFO L226 Difference]: Without dead ends: 355 [2021-05-02 15:14:08,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:14:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-02 15:14:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2021-05-02 15:14:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 265 states have (on average 1.3320754716981131) internal successors, (353), 271 states have internal predecessors, (353), 74 states have call successors, (74), 16 states have call predecessors, (74), 15 states have return successors, (72), 67 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 15:14:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 499 transitions. [2021-05-02 15:14:08,139 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 499 transitions. Word has length 59 [2021-05-02 15:14:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:08,139 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 499 transitions. [2021-05-02 15:14:08,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 15:14:08,139 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 499 transitions. [2021-05-02 15:14:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:14:08,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:08,140 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 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] [2021-05-02 15:14:08,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:08,345 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2045333201, now seen corresponding path program 1 times [2021-05-02 15:14:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:08,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245276594] [2021-05-02 15:14:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:08,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:08,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757675374] [2021-05-02 15:14:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:14:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:14:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:14:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:14:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 15:14:08,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:14:08,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245276594] [2021-05-02 15:14:08,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:14:08,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757675374] [2021-05-02 15:14:08,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757675374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:14:08,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:14:08,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:14:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768376768] [2021-05-02 15:14:08,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:14:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:14:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:14:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:14:08,630 INFO L87 Difference]: Start difference. First operand 355 states and 499 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 15:14:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:09,158 INFO L93 Difference]: Finished difference Result 561 states and 788 transitions. [2021-05-02 15:14:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:14:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2021-05-02 15:14:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:09,162 INFO L225 Difference]: With dead ends: 561 [2021-05-02 15:14:09,163 INFO L226 Difference]: Without dead ends: 376 [2021-05-02 15:14:09,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:14:09,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-02 15:14:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-05-02 15:14:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 207 states have (on average 1.3043478260869565) internal successors, (270), 217 states have internal predecessors, (270), 56 states have call successors, (56), 16 states have call predecessors, (56), 15 states have return successors, (54), 45 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 15:14:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 380 transitions. [2021-05-02 15:14:09,182 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 380 transitions. Word has length 61 [2021-05-02 15:14:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:09,182 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 380 transitions. [2021-05-02 15:14:09,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 15:14:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 380 transitions. [2021-05-02 15:14:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 15:14:09,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:09,183 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 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] [2021-05-02 15:14:09,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:09,399 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1402694082, now seen corresponding path program 2 times [2021-05-02 15:14:09,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:09,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255935310] [2021-05-02 15:14:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:09,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:09,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560781147] [2021-05-02 15:14:09,403 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:09,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:14:09,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 15:14:09,456 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:14:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:14:09,471 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:14:09,513 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:14:09,513 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:14:09,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 15:14:09,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:14:09 BoogieIcfgContainer [2021-05-02 15:14:09,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:14:09,757 INFO L168 Benchmark]: Toolchain (without parser) took 657793.56 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 165.2 MB in the beginning and 150.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 56.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:09,757 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 181.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:14:09,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.06 ms. Allocated memory is still 200.3 MB. Free memory was 165.0 MB in the beginning and 155.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:09,757 INFO L168 Benchmark]: Boogie Preprocessor took 49.17 ms. Allocated memory is still 200.3 MB. Free memory was 154.8 MB in the beginning and 182.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:09,757 INFO L168 Benchmark]: RCFGBuilder took 335.23 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 165.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:09,757 INFO L168 Benchmark]: TraceAbstraction took 657254.95 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 165.1 MB in the beginning and 150.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:09,758 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 200.3 MB. Free memory is still 181.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 143.06 ms. Allocated memory is still 200.3 MB. Free memory was 165.0 MB in the beginning and 155.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.17 ms. Allocated memory is still 200.3 MB. Free memory was 154.8 MB in the beginning and 182.4 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 335.23 ms. Allocated memory is still 200.3 MB. Free memory was 182.4 MB in the beginning and 165.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 657254.95 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 165.1 MB in the beginning and 150.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=8, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=5, counter=0, R=1] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=5, counter=0, R=1] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=5, counter=0, r=-4, R=1, u=3, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=1, counter++=0, r=-4, R=1, u=3, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=1, r=-4, R=1, u=3, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=5, counter=1, r=-4, R=1, u=3, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=5, counter=2, counter++=1, r=-4, R=1, u=3, v=1] [L39] COND TRUE counter++<5 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=2, r=-4, R=1, u=3, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=5, counter=2, r=-4, R=1, u=3, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=3, counter++=2, r=-4, R=1, u=3, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=3, r=-4, R=1, u=3, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=5, counter=3, R=1, r=-1, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=4, counter++=3, R=1, r=-1, u=5, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=4, r=-1, R=1, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=5, counter=4, r=4, R=1, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=5, counter=5, counter++=4, R=1, r=4, u=7, v=1] [L47] COND TRUE counter++<5 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=5, counter=5, r=4, R=1, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=5, counter=5, R=1, r=4, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=5, counter=6, counter++=5, r=4, R=1, u=7, v=1] [L34] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 657159.3ms, OverallIterations: 21, TraceHistogramMax: 6, EmptinessCheckTime: 30.1ms, AutomataDifference: 565053.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 904 SDtfs, 661 SDslu, 3310 SDs, 0 SdLazy, 2199 SolverSat, 300 SolverUnsat, 157 SolverUnknown, 0 SolverNotchecked, 449453.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 922 GetRequests, 754 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 196460.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=375occurred in iteration=17, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 296.0ms AutomataMinimizationTime, 20 MinimizatonAttempts, 224 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 173.9ms SsaConstructionTime, 763.2ms SatisfiabilityAnalysisTime, 85497.4ms InterpolantComputationTime, 956 NumberOfCodeBlocks, 940 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 873 ConstructedInterpolants, 35 QuantifiedInterpolants, 5728 SizeOfPredicates, 65 NumberOfNonLiveVariables, 3417 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 334/562 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...