/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/hard-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:32,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:32,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:32,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:25:32,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:32,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:32,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:32,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:32,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:32,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:32,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:32,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:32,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:32,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:32,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:32,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:32,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:25:32,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:32,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:32,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:32,732 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 15:25:32,758 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:32,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:32,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:32,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:32,761 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:32,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:32,761 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:32,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:32,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:32,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:32,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:32,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:32,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:32,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:32,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:32,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:33,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:33,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:33,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:33,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:33,075 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:33,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound2.c [2021-05-02 15:25:33,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5b37d8bc/e356259b61b04a9ea4420ef4eca0dc46/FLAG3b7c8d52c [2021-05-02 15:25:33,527 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:33,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound2.c [2021-05-02 15:25:33,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5b37d8bc/e356259b61b04a9ea4420ef4eca0dc46/FLAG3b7c8d52c [2021-05-02 15:25:33,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5b37d8bc/e356259b61b04a9ea4420ef4eca0dc46 [2021-05-02 15:25:33,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:33,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:33,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:33,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:33,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:33,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac80d11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:33, skipping insertion in model container [2021-05-02 15:25:33,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:33" (1/1) ... [2021-05-02 15:25:33,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:33,990 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:34,120 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/hard-ll_unwindbound2.c[546,559] [2021-05-02 15:25:34,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:34,136 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:34,145 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/hard-ll_unwindbound2.c[546,559] [2021-05-02 15:25:34,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:34,158 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:34,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34 WrapperNode [2021-05-02 15:25:34,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:34,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:34,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:34,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:34,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (1/1) ... [2021-05-02 15:25:34,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:34,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:34,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:34,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:34,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (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 15:25:34,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:34,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:34,270 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:25:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:34,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:34,560 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:25:34,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:34 BoogieIcfgContainer [2021-05-02 15:25:34,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:34,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:34,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:34,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:34,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:33" (1/3) ... [2021-05-02 15:25:34,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1a015a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:34, skipping insertion in model container [2021-05-02 15:25:34,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:34" (2/3) ... [2021-05-02 15:25:34,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1a015a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:34, skipping insertion in model container [2021-05-02 15:25:34,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:34" (3/3) ... [2021-05-02 15:25:34,568 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound2.c [2021-05-02 15:25:34,573 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:34,577 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:34,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:34,616 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:34,616 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:34,617 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:34,617 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:34,617 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:34,617 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:34,617 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:34,617 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:25:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:34,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,638 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,638 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:25:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583759343] [2021-05-02 15:25:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:34,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:34,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583759343] [2021-05-02 15:25:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583759343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:34,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432581556] [2021-05-02 15:25:34,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:34,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:34,984 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,172 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:25:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:35,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,180 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:25:35,180 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:35,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:25:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:25:35,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:25:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,211 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:25:35,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:25:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:35,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,212 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:35,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:35,212 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,213 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:25:35,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678363384] [2021-05-02 15:25:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:35,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:35,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678363384] [2021-05-02 15:25:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678363384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:35,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:35,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593863492] [2021-05-02 15:25:35,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:35,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:35,297 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,506 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:25:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,508 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:25:35,508 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:35,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:35,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:25:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:25:35,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:25:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,518 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:25:35,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:25:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:25:35,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,519 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:35,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:25:35,519 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:25:35,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673605870] [2021-05-02 15:25:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:35,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582127586] [2021-05-02 15:25:35,532 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 15:25:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:25:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:35,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:35,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:35,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673605870] [2021-05-02 15:25:35,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:35,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582127586] [2021-05-02 15:25:35,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582127586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:35,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:35,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:25:35,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041660895] [2021-05-02 15:25:35,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:25:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:25:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:35,655 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,666 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:25:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:25:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:25:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,667 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:35,667 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:25:35,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:25:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:25:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:25:35,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:25:35,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,673 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:25:35,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:25:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:25:35,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,674 INFO L523 BasicCegarLoop]: trace histogram [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 15:25:35,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:25:35,891 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:25:35,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577335387] [2021-05-02 15:25:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:35,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:25:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:36,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577335387] [2021-05-02 15:25:36,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577335387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:36,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:36,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757171888] [2021-05-02 15:25:36,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:36,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:36,009 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:36,212 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:25:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:25:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:36,215 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:36,215 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:25:36,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:25:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:25:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:25:36,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:25:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:36,230 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:25:36,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:25:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:25:36,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:36,232 INFO L523 BasicCegarLoop]: trace histogram [3, 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 15:25:36,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:25:36,232 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:36,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:36,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:25:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:36,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020444321] [2021-05-02 15:25:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:36,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:36,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796545098] [2021-05-02 15:25:36,251 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 15:25:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:36,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:25:36,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020444321] [2021-05-02 15:25:36,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:36,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796545098] [2021-05-02 15:25:36,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796545098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:36,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:36,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:36,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21839130] [2021-05-02 15:25:36,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:36,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:36,425 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 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 15:25:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:36,526 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 15:25:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 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 28 [2021-05-02 15:25:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:36,527 INFO L225 Difference]: With dead ends: 75 [2021-05-02 15:25:36,527 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:36,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:25:36,534 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 15:25:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:36,534 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:25:36,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 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 15:25:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:25:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:36,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:36,535 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 15:25:36,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:36,751 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:25:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:36,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857360356] [2021-05-02 15:25:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:36,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:36,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238898673] [2021-05-02 15:25:36,759 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 15:25:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:36,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:36,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857360356] [2021-05-02 15:25:36,974 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:36,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238898673] [2021-05-02 15:25:36,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238898673] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:36,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:36,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:25:36,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534468246] [2021-05-02 15:25:36,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:36,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:36,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:36,976 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:37,062 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:25:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:25:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:25:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:37,063 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:25:37,063 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:25:37,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:25:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:25:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:25:37,071 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:25:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:37,072 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:25:37,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:25:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:37,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:37,073 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 15:25:37,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,274 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:25:37,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:37,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137494269] [2021-05-02 15:25:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:37,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:37,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311189981] [2021-05-02 15:25:37,283 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 15:25:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:37,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137494269] [2021-05-02 15:25:37,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:37,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311189981] [2021-05-02 15:25:37,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311189981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:37,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:37,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:25:37,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747749411] [2021-05-02 15:25:37,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:25:37,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:25:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:37,610 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:37,722 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:25:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:25:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:25:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:37,723 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:37,723 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:25:37,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:25:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:25:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:25:37,730 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:25:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:37,730 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:25:37,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:25:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:25:37,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:37,732 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 15:25:37,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:37,945 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:25:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468313199] [2021-05-02 15:25:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:37,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051839092] [2021-05-02 15:25:37,958 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 15:25:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:38,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:38,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468313199] [2021-05-02 15:25:38,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051839092] [2021-05-02 15:25:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051839092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:38,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:38,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:38,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017689040] [2021-05-02 15:25:38,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:38,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:38,107 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:38,144 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:25:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:38,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:25:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:38,145 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:38,145 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:38,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:25:38,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:25:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:38,151 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:25:38,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:25:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:25:38,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:38,152 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:38,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:38,368 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:38,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:38,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:25:38,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:38,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707420131] [2021-05-02 15:25:38,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:38,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:38,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166997138] [2021-05-02 15:25:38,374 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 15:25:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:25:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:38,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:38,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707420131] [2021-05-02 15:25:38,591 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166997138] [2021-05-02 15:25:38,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166997138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:38,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:38,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:38,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22670166] [2021-05-02 15:25:38,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:38,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:38,592 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:38,834 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2021-05-02 15:25:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 15:25:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:38,835 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:38,835 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:25:38,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:25:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 15:25:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 15:25:38,843 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 15:25:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:38,843 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 15:25:38,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:25:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 15:25:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:38,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:38,844 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-02 15:25:39,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:39,061 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:25:39,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:39,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374061990] [2021-05-02 15:25:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:39,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:39,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864853079] [2021-05-02 15:25:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:25:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:39,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:25:39,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:39,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374061990] [2021-05-02 15:25:39,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:39,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864853079] [2021-05-02 15:25:39,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864853079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:39,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:39,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:25:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563806390] [2021-05-02 15:25:39,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:25:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:25:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:39,356 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:39,618 INFO L93 Difference]: Finished difference Result 112 states and 144 transitions. [2021-05-02 15:25:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:25:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:39,620 INFO L225 Difference]: With dead ends: 112 [2021-05-02 15:25:39,620 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 15:25:39,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:25:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 15:25:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2021-05-02 15:25:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 58 states have internal predecessors, (67), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-05-02 15:25:39,633 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 54 [2021-05-02 15:25:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:39,633 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-05-02 15:25:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-05-02 15:25:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 15:25:39,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:39,635 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-02 15:25:39,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:25:39,849 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 1 times [2021-05-02 15:25:39,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:39,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582168977] [2021-05-02 15:25:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:39,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:39,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386636469] [2021-05-02 15:25:39,858 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 15:25:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:25:39,909 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:25:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:25:39,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:25:39,979 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:25:39,979 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:25:40,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:25:40,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:25:40 BoogieIcfgContainer [2021-05-02 15:25:40,238 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:25:40,239 INFO L168 Benchmark]: Toolchain (without parser) took 6291.05 ms. Allocated memory was 249.6 MB in the beginning and 374.3 MB in the end (delta: 124.8 MB). Free memory was 213.4 MB in the beginning and 203.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 135.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:40,239 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 249.6 MB. Free memory was 230.6 MB in the beginning and 230.5 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:25:40,239 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.90 ms. Allocated memory is still 249.6 MB. Free memory was 213.3 MB in the beginning and 203.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:40,239 INFO L168 Benchmark]: Boogie Preprocessor took 58.49 ms. Allocated memory is still 249.6 MB. Free memory was 203.3 MB in the beginning and 232.5 MB in the end (delta: -29.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:40,239 INFO L168 Benchmark]: RCFGBuilder took 342.90 ms. Allocated memory is still 249.6 MB. Free memory was 232.5 MB in the beginning and 215.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:40,240 INFO L168 Benchmark]: TraceAbstraction took 5675.74 ms. Allocated memory was 249.6 MB in the beginning and 374.3 MB in the end (delta: 124.8 MB). Free memory was 215.2 MB in the beginning and 203.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 136.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:40,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 249.6 MB. Free memory was 230.6 MB in the beginning and 230.5 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 204.90 ms. Allocated memory is still 249.6 MB. Free memory was 213.3 MB in the beginning and 203.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.49 ms. Allocated memory is still 249.6 MB. Free memory was 203.3 MB in the beginning and 232.5 MB in the end (delta: -29.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.90 ms. Allocated memory is still 249.6 MB. Free memory was 232.5 MB in the beginning and 215.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5675.74 ms. Allocated memory was 249.6 MB in the beginning and 374.3 MB in the end (delta: 124.8 MB). Free memory was 215.2 MB in the beginning and 203.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 136.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=-4294967295, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=1, B=-4294967295, counter=0, d=1, p=1, q=0, r=1] [L35] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=2, p=2, q=0, r=1] [L35] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L45] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L45] COND FALSE !(counter++<2) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=-4294967295, counter=3, d=2, p=2, q=0, r=1] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5579.2ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 15.4ms, AutomataDifference: 1509.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 397 SDtfs, 218 SDslu, 1189 SDs, 0 SdLazy, 889 SolverSat, 148 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 759.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 726.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=10, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.9ms AutomataMinimizationTime, 10 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 83.5ms SsaConstructionTime, 228.0ms SatisfiabilityAnalysisTime, 1402.4ms InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1338 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 178/199 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! Received shutdown request...