/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/geo2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:45:08,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:45:08,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:45:08,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:45:08,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:45:08,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:45:08,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:45:08,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:45:08,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:45:08,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:45:08,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:45:08,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:45:08,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:45:08,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:45:08,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:45:08,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:45:08,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:45:08,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:45:08,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:45:08,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:45:08,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:45:08,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:45:08,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:45:08,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:45:08,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:45:08,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:45:08,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:45:08,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:45:08,959 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:45:08,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:45:08,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:45:08,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:45:08,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:45:08,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:45:08,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:45:08,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:45:08,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:45:08,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:45:08,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:45:08,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:45:08,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:45:08,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:45:08,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:45:08,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:45:08,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:45:08,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:45:08,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:45:08,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:45:08,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:45:08,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:45:08,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:45:08,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:45:08,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:45:08,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:45:08,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:45:08,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:45:09,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:45:09,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:45:09,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:45:09,258 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:45:09,259 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:45:09,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound5.c [2021-05-06 02:45:09,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166c941c5/4754b03df132407bb7a493d81aee2421/FLAG6501e1020 [2021-05-06 02:45:09,640 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:45:09,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound5.c [2021-05-06 02:45:09,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166c941c5/4754b03df132407bb7a493d81aee2421/FLAG6501e1020 [2021-05-06 02:45:10,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/166c941c5/4754b03df132407bb7a493d81aee2421 [2021-05-06 02:45:10,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:45:10,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:45:10,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:45:10,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:45:10,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:45:10,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f40e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10, skipping insertion in model container [2021-05-06 02:45:10,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:45:10,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:45:10,195 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/geo2-ll_unwindbound5.c[525,538] [2021-05-06 02:45:10,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:45:10,212 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:45:10,219 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/geo2-ll_unwindbound5.c[525,538] [2021-05-06 02:45:10,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:45:10,234 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:45:10,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10 WrapperNode [2021-05-06 02:45:10,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:45:10,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:45:10,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:45:10,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:45:10,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... [2021-05-06 02:45:10,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:45:10,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:45:10,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:45:10,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:45:10,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:45:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:45:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:45:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:45:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:45:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:45:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:45:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:45:10,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:45:10,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:45:10,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:45:10,601 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:45:10,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:45:10 BoogieIcfgContainer [2021-05-06 02:45:10,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:45:10,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:45:10,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:45:10,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:45:10,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:45:10" (1/3) ... [2021-05-06 02:45:10,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eb8ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:45:10, skipping insertion in model container [2021-05-06 02:45:10,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:10" (2/3) ... [2021-05-06 02:45:10,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67eb8ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:45:10, skipping insertion in model container [2021-05-06 02:45:10,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:45:10" (3/3) ... [2021-05-06 02:45:10,606 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound5.c [2021-05-06 02:45:10,622 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:45:10,625 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:45:10,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:45:10,651 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:45:10,652 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:45:10,652 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:45:10,652 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:45:10,652 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:45:10,652 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:45:10,652 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:45:10,652 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:45:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:45:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:45:10,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:10,668 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:10,668 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 02:45:10,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:10,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108705152] [2021-05-06 02:45:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:10,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:45:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:10,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:10,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108705152] [2021-05-06 02:45:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108705152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:10,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:10,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:45:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863072335] [2021-05-06 02:45:10,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:45:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:10,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:45:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:45:10,880 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:10,933 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 02:45:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:45:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 02:45:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:10,940 INFO L225 Difference]: With dead ends: 39 [2021-05-06 02:45:10,940 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 02:45:10,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:45:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 02:45:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 02:45:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 02:45:10,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 02:45:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:10,968 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 02:45:10,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 02:45:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:45:10,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:10,970 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:10,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:45:10,970 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:10,971 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 02:45:10,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:10,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604261403] [2021-05-06 02:45:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:11,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:11,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856055981] [2021-05-06 02:45:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:45:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:11,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:11,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604261403] [2021-05-06 02:45:11,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856055981] [2021-05-06 02:45:11,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856055981] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:11,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:11,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:45:11,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46436164] [2021-05-06 02:45:11,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:45:11,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:45:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:45:11,171 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:11,179 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 02:45:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:45:11,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:45:11,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:11,180 INFO L225 Difference]: With dead ends: 26 [2021-05-06 02:45:11,180 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:45:11,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:45:11,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:45:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 02:45:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 02:45:11,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 02:45:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:11,184 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 02:45:11,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 02:45:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:45:11,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:11,185 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:11,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:45:11,406 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 02:45:11,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:11,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716829352] [2021-05-06 02:45:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:11,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:11,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315850350] [2021-05-06 02:45:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:45:11,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:11,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716829352] [2021-05-06 02:45:11,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315850350] [2021-05-06 02:45:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315850350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:11,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:11,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:45:11,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377367935] [2021-05-06 02:45:11,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:45:11,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:11,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:45:11,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:45:11,542 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:11,565 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 02:45:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:45:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:45:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:11,566 INFO L225 Difference]: With dead ends: 28 [2021-05-06 02:45:11,566 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:45:11,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:45:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:45:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:45:11,571 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 02:45:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:11,571 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:45:11,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:45:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:45:11,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:11,571 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:11,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:11,785 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 02:45:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:11,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317121484] [2021-05-06 02:45:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:11,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:11,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307369960] [2021-05-06 02:45:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:45:11,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:11,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:11,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317121484] [2021-05-06 02:45:11,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:11,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307369960] [2021-05-06 02:45:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307369960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:11,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:45:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709640954] [2021-05-06 02:45:11,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:45:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:45:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:45:11,900 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:11,936 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 02:45:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:45:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:45:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:11,938 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:45:11,938 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:45:11,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:45:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 02:45:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 02:45:11,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 02:45:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:11,942 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 02:45:11,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 02:45:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:45:11,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:11,943 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:12,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:12,156 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:12,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:12,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 02:45:12,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:12,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123139277] [2021-05-06 02:45:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:12,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:12,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423347746] [2021-05-06 02:45:12,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:12,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:45:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:12,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:12,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123139277] [2021-05-06 02:45:12,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:12,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423347746] [2021-05-06 02:45:12,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423347746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:12,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:12,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:45:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663851277] [2021-05-06 02:45:12,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:45:12,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:45:12,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:12,299 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:12,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:12,342 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 02:45:12,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:45:12,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:45:12,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:12,344 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:45:12,344 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 02:45:12,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:45:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 02:45:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 02:45:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:45:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 02:45:12,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 02:45:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:12,350 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 02:45:12,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 02:45:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:45:12,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:12,351 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:12,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:12,561 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 02:45:12,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:12,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186343961] [2021-05-06 02:45:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:12,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:12,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974389828] [2021-05-06 02:45:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:12,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:45:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:45:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:12,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:12,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:12,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186343961] [2021-05-06 02:45:12,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:12,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974389828] [2021-05-06 02:45:12,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974389828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:12,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:12,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:45:12,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481015040] [2021-05-06 02:45:12,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:45:12,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:45:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:12,743 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:12,777 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 02:45:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:45:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:45:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:12,778 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:45:12,779 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:45:12,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:45:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:45:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:45:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:45:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 02:45:12,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 02:45:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:12,783 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 02:45:12,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 02:45:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:45:12,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:12,784 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:13,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:45:13,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 02:45:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:13,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262162223] [2021-05-06 02:45:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:13,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:13,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410919661] [2021-05-06 02:45:13,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:13,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:45:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:13,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:45:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:45:13,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:13,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262162223] [2021-05-06 02:45:13,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:13,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410919661] [2021-05-06 02:45:13,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410919661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:13,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:13,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:45:13,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139298974] [2021-05-06 02:45:13,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:45:13,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:45:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:45:13,808 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:55,804 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 02:45:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:45:55,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:45:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:55,806 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:45:55,806 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:45:55,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 580.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:45:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:45:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 02:45:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:45:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 02:45:55,811 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 02:45:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:55,811 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 02:45:55,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 02:45:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:45:55,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:55,812 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:56,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:56,029 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 02:45:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:56,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149608934] [2021-05-06 02:45:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:56,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:56,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141214805] [2021-05-06 02:45:56,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:56,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:45:56,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:56,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:45:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:56,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:45:56,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149608934] [2021-05-06 02:45:56,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141214805] [2021-05-06 02:45:56,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141214805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:56,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:56,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:45:56,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013085371] [2021-05-06 02:45:56,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:45:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:56,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:45:56,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:45:56,369 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)